diff --git a/src/main/java/org/kohsuke/github/GHIssue.java b/src/main/java/org/kohsuke/github/GHIssue.java
index 372f5c1020..2e9d2b597f 100644
--- a/src/main/java/org/kohsuke/github/GHIssue.java
+++ b/src/main/java/org/kohsuke/github/GHIssue.java
@@ -312,7 +312,7 @@ public void assignTo(GHUser user) throws IOException {
     }
 
     /**
-     * Sets labels.
+     * Sets labels on the target to a specific list.
      *
      * @param labels
      *            the labels
@@ -326,6 +326,8 @@ public void setLabels(String... labels) throws IOException {
     /**
      * Adds labels to the issue.
      *
+     * Labels that are already present on the target are ignored.
+     *
      * @param names
      *            Names of the label
      * @throws IOException
@@ -338,6 +340,8 @@ public void addLabels(String... names) throws IOException {
     /**
      * Add labels.
      *
+     * Labels that are already present on the target are ignored.
+     *
      * @param labels
      *            the labels
      * @throws IOException
@@ -350,6 +354,8 @@ public void addLabels(GHLabel... labels) throws IOException {
     /**
      * Add labels.
      *
+     * Labels that are already present on the target are ignored.
+     *
      * @param labels
      *            the labels
      * @throws IOException
@@ -360,21 +366,27 @@ public void addLabels(Collection<GHLabel> labels) throws IOException {
     }
 
     private void _addLabels(Collection<String> names) throws IOException {
-        List<String> newLabels = new ArrayList<String>();
+        root.createRequest().with("labels", names).method("POST").withUrlPath(getIssuesApiRoute() + "/labels").send();
+    }
 
-        for (GHLabel label : getLabels()) {
-            newLabels.add(label.getName());
-        }
-        for (String name : names) {
-            if (!newLabels.contains(name)) {
-                newLabels.add(name);
-            }
-        }
-        setLabels(newLabels.toArray(new String[0]));
+    /**
+     * Remove a single label.
+     *
+     * Attempting to remove a label that is not present throws {@link GHFileNotFoundException}.
+     *
+     * @param name
+     *            the name
+     * @throws IOException
+     *             the io exception, throws {@link GHFileNotFoundException} if label was not present.
+     */
+    public void removeLabel(String name) throws IOException {
+        root.createRequest().method("DELETE").withUrlPath(getIssuesApiRoute() + "/labels", name).send();
     }
 
     /**
-     * Remove a given label by name from this issue.
+     * Remove a collection of labels.
+     *
+     * Attempting to remove labels that are not present on the target are ignored.
      *
      * @param names
      *            the names
@@ -386,7 +398,9 @@ public void removeLabels(String... names) throws IOException {
     }
 
     /**
-     * Remove labels.
+     * Remove a collection of labels.
+     *
+     * Attempting to remove labels that are not present on the target are ignored.
      *
      * @param labels
      *            the labels
@@ -399,7 +413,9 @@ public void removeLabels(GHLabel... labels) throws IOException {
     }
 
     /**
-     * Remove labels.
+     * Remove a collection of labels.
+     *
+     * Attempting to remove labels that are not present on the target are ignored.
      *
      * @param labels
      *            the labels
@@ -411,15 +427,13 @@ public void removeLabels(Collection<GHLabel> labels) throws IOException {
     }
 
     private void _removeLabels(Collection<String> names) throws IOException {
-        List<String> newLabels = new ArrayList<String>();
-
-        for (GHLabel l : getLabels()) {
-            if (!names.contains(l.getName())) {
-                newLabels.add(l.getName());
+        for (String name : names) {
+            try {
+                removeLabel(name);
+            } catch (GHFileNotFoundException e) {
+                // when trying to remove multiple labels, we ignore already removed
             }
         }
-
-        setLabels(newLabels.toArray(new String[0]));
     }
 
     /**
diff --git a/src/test/java/org/kohsuke/github/GHIssueEventTest.java b/src/test/java/org/kohsuke/github/GHIssueEventTest.java
index a0779c10f3..eae6d0b3ba 100644
--- a/src/test/java/org/kohsuke/github/GHIssueEventTest.java
+++ b/src/test/java/org/kohsuke/github/GHIssueEventTest.java
@@ -18,7 +18,7 @@ public void testEventsForSingleIssue() throws Exception {
         GHIssue issue = builder.create();
 
         // Generate some events.
-        issue.addLabels("test-label");
+        issue.setLabels("test-label");
 
         // Test that the events are present.
         List<GHIssueEvent> list = issue.listEvents().toList();
diff --git a/src/test/java/org/kohsuke/github/GHPullRequestTest.java b/src/test/java/org/kohsuke/github/GHPullRequestTest.java
index 5e80e769fe..70f339327a 100644
--- a/src/test/java/org/kohsuke/github/GHPullRequestTest.java
+++ b/src/test/java/org/kohsuke/github/GHPullRequestTest.java
@@ -9,7 +9,7 @@
 import java.util.Collections;
 import java.util.List;
 
-import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.Matchers.*;
 
 /**
  * @author Kohsuke Kawaguchi
@@ -421,6 +421,88 @@ public void setLabels() throws Exception {
         assertEquals(label, labels.iterator().next().getName());
     }
 
+    @Test
+    // Requires push access to the test repo to pass
+    public void addLabels() throws Exception {
+        GHPullRequest p = getRepository().createPullRequest("addLabels", "test/stable", "master", "## test");
+        String addedLabel1 = "addLabels_label_name_1";
+        String addedLabel2 = "addLabels_label_name_2";
+        String addedLabel3 = "addLabels_label_name_3";
+
+        p.addLabels(addedLabel1);
+
+        int requestCount = mockGitHub.getRequestCount();
+        p.addLabels(addedLabel2, addedLabel3);
+        // multiple labels can be added with one api call
+        assertThat(mockGitHub.getRequestCount(), equalTo(requestCount + 1));
+
+        Collection<GHLabel> labels = getRepository().getPullRequest(p.getNumber()).getLabels();
+        assertEquals(3, labels.size());
+        assertThat(labels,
+                containsInAnyOrder(hasProperty("name", equalTo(addedLabel1)),
+                        hasProperty("name", equalTo(addedLabel2)),
+                        hasProperty("name", equalTo(addedLabel3))));
+
+        // Adding a label which is already present does not throw an error
+        p.addLabels(addedLabel1);
+    }
+
+    @Test
+    // Requires push access to the test repo to pass
+    public void addLabelsConcurrencyIssue() throws Exception {
+        String addedLabel1 = "addLabelsConcurrencyIssue_label_name_1";
+        String addedLabel2 = "addLabelsConcurrencyIssue_label_name_2";
+
+        GHPullRequest p1 = getRepository()
+                .createPullRequest("addLabelsConcurrencyIssue", "test/stable", "master", "## test");
+        p1.getLabels();
+
+        GHPullRequest p2 = getRepository().getPullRequest(p1.getNumber());
+        p2.addLabels(addedLabel2);
+
+        p1.addLabels(addedLabel1);
+
+        Collection<GHLabel> labels = getRepository().getPullRequest(p1.getNumber()).getLabels();
+        assertEquals(2, labels.size());
+        assertThat(labels,
+                containsInAnyOrder(hasProperty("name", equalTo(addedLabel1)),
+                        hasProperty("name", equalTo(addedLabel2))));
+    }
+
+    @Test
+    // Requires push access to the test repo to pass
+    public void removeLabels() throws Exception {
+        GHPullRequest p = getRepository().createPullRequest("removeLabels", "test/stable", "master", "## test");
+        String label1 = "removeLabels_label_name_1";
+        String label2 = "removeLabels_label_name_2";
+        String label3 = "removeLabels_label_name_3";
+        p.setLabels(label1, label2, label3);
+
+        Collection<GHLabel> labels = getRepository().getPullRequest(p.getNumber()).getLabels();
+        assertEquals(3, labels.size());
+
+        int requestCount = mockGitHub.getRequestCount();
+        p.removeLabels(label2, label3);
+        // each label deleted is a separate api call
+        assertThat(mockGitHub.getRequestCount(), equalTo(requestCount + 2));
+
+        labels = getRepository().getPullRequest(p.getNumber()).getLabels();
+        assertEquals(1, labels.size());
+        assertEquals(label1, labels.iterator().next().getName());
+
+        // Removing some labels that are not present does not throw
+        // This is consistent with earlier behavior and with addLabels()
+        p.removeLabels(label3);
+
+        // Calling removeLabel() on label that is not present will throw
+        try {
+            p.removeLabel(label3);
+            fail("Expected GHFileNotFoundException");
+        } catch (GHFileNotFoundException e) {
+            assertThat(e.getMessage(), containsString("Label does not exist"));
+        }
+    }
+
     @Test
     // Requires push access to the test repo to pass
     public void setAssignee() throws Exception {
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/orgs_hub4j-test-org-2.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/orgs_hub4j-test-org-2.json
new file mode 100644
index 0000000000..22e315897d
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/orgs_hub4j-test-org-2.json
@@ -0,0 +1,50 @@
+{
+  "login": "hub4j-test-org",
+  "id": 7544739,
+  "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+  "url": "https://api.github.com/orgs/hub4j-test-org",
+  "repos_url": "https://api.github.com/orgs/hub4j-test-org/repos",
+  "events_url": "https://api.github.com/orgs/hub4j-test-org/events",
+  "hooks_url": "https://api.github.com/orgs/hub4j-test-org/hooks",
+  "issues_url": "https://api.github.com/orgs/hub4j-test-org/issues",
+  "members_url": "https://api.github.com/orgs/hub4j-test-org/members{/member}",
+  "public_members_url": "https://api.github.com/orgs/hub4j-test-org/public_members{/member}",
+  "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+  "description": "Hub4j Test Org Description (this could be null or blank too)",
+  "name": "Hub4j Test Org Name (this could be null or blank too)",
+  "company": null,
+  "blog": "https://hub4j.url.io/could/be/null",
+  "location": "Hub4j Test Org Location (this could be null or blank too)",
+  "email": "hub4jtestorgemail@could.be.null.com",
+  "twitter_username": null,
+  "is_verified": false,
+  "has_organization_projects": true,
+  "has_repository_projects": true,
+  "public_repos": 12,
+  "public_gists": 0,
+  "followers": 0,
+  "following": 0,
+  "html_url": "https://github.com/hub4j-test-org",
+  "created_at": "2014-05-10T19:39:11Z",
+  "updated_at": "2020-06-04T05:56:10Z",
+  "type": "Organization",
+  "total_private_repos": 2,
+  "owned_private_repos": 2,
+  "private_gists": 0,
+  "disk_usage": 154,
+  "collaborators": 0,
+  "billing_email": "kk@kohsuke.org",
+  "default_repository_permission": "none",
+  "members_can_create_repositories": false,
+  "two_factor_requirement_enabled": false,
+  "members_can_create_pages": true,
+  "members_can_create_public_pages": true,
+  "members_can_create_private_pages": true,
+  "plan": {
+    "name": "free",
+    "space": 976562499,
+    "private_repos": 10000,
+    "filled_seats": 22,
+    "seats": 3
+  }
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api-3.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api-3.json
new file mode 100644
index 0000000000..6989a7b7c3
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api-3.json
@@ -0,0 +1,332 @@
+{
+  "id": 206888201,
+  "node_id": "MDEwOlJlcG9zaXRvcnkyMDY4ODgyMDE=",
+  "name": "github-api",
+  "full_name": "hub4j-test-org/github-api",
+  "private": false,
+  "owner": {
+    "login": "hub4j-test-org",
+    "id": 7544739,
+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Resetting",
+  "fork": true,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+  "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
+  "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
+  "blobs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/blobs{/sha}",
+  "git_tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/tags{/sha}",
+  "git_refs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/refs{/sha}",
+  "trees_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/trees{/sha}",
+  "statuses_url": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/{sha}",
+  "languages_url": "https://api.github.com/repos/hub4j-test-org/github-api/languages",
+  "stargazers_url": "https://api.github.com/repos/hub4j-test-org/github-api/stargazers",
+  "contributors_url": "https://api.github.com/repos/hub4j-test-org/github-api/contributors",
+  "subscribers_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscribers",
+  "subscription_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscription",
+  "commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/commits{/sha}",
+  "git_commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/commits{/sha}",
+  "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/comments{/number}",
+  "issue_comment_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/comments{/number}",
+  "contents_url": "https://api.github.com/repos/hub4j-test-org/github-api/contents/{+path}",
+  "compare_url": "https://api.github.com/repos/hub4j-test-org/github-api/compare/{base}...{head}",
+  "merges_url": "https://api.github.com/repos/hub4j-test-org/github-api/merges",
+  "archive_url": "https://api.github.com/repos/hub4j-test-org/github-api/{archive_format}{/ref}",
+  "downloads_url": "https://api.github.com/repos/hub4j-test-org/github-api/downloads",
+  "issues_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues{/number}",
+  "pulls_url": "https://api.github.com/repos/hub4j-test-org/github-api/pulls{/number}",
+  "milestones_url": "https://api.github.com/repos/hub4j-test-org/github-api/milestones{/number}",
+  "notifications_url": "https://api.github.com/repos/hub4j-test-org/github-api/notifications{?since,all,participating}",
+  "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/labels{/name}",
+  "releases_url": "https://api.github.com/repos/hub4j-test-org/github-api/releases{/id}",
+  "deployments_url": "https://api.github.com/repos/hub4j-test-org/github-api/deployments",
+  "created_at": "2019-09-06T23:26:04Z",
+  "updated_at": "2021-01-22T03:50:37Z",
+  "pushed_at": "2021-03-13T01:53:25Z",
+  "git_url": "git://github.com/hub4j-test-org/github-api.git",
+  "ssh_url": "git@github.com:hub4j-test-org/github-api.git",
+  "clone_url": "https://github.com/hub4j-test-org/github-api.git",
+  "svn_url": "https://github.com/hub4j-test-org/github-api",
+  "homepage": "http://github-api.kohsuke.org/",
+  "size": 19052,
+  "stargazers_count": 0,
+  "watchers_count": 0,
+  "language": "Java",
+  "has_issues": true,
+  "has_projects": true,
+  "has_downloads": true,
+  "has_wiki": true,
+  "has_pages": false,
+  "forks_count": 0,
+  "mirror_url": null,
+  "archived": false,
+  "disabled": false,
+  "open_issues_count": 5,
+  "license": {
+    "key": "mit",
+    "name": "MIT License",
+    "spdx_id": "MIT",
+    "url": "https://api.github.com/licenses/mit",
+    "node_id": "MDc6TGljZW5zZTEz"
+  },
+  "forks": 0,
+  "open_issues": 5,
+  "watchers": 0,
+  "default_branch": "master",
+  "permissions": {
+    "admin": true,
+    "push": true,
+    "pull": true
+  },
+  "temp_clone_token": "",
+  "allow_squash_merge": true,
+  "allow_merge_commit": true,
+  "allow_rebase_merge": true,
+  "delete_branch_on_merge": false,
+  "organization": {
+    "login": "hub4j-test-org",
+    "id": 7544739,
+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "parent": {
+    "id": 617210,
+    "node_id": "MDEwOlJlcG9zaXRvcnk2MTcyMTA=",
+    "name": "github-api",
+    "full_name": "hub4j/github-api",
+    "private": false,
+    "owner": {
+      "login": "hub4j",
+      "id": 54909825,
+      "node_id": "MDEyOk9yZ2FuaXphdGlvbjU0OTA5ODI1",
+      "avatar_url": "https://avatars.githubusercontent.com/u/54909825?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
+      "followers_url": "https://api.github.com/users/hub4j/followers",
+      "following_url": "https://api.github.com/users/hub4j/following{/other_user}",
+      "gists_url": "https://api.github.com/users/hub4j/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/hub4j/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/hub4j/github-api",
+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
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+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
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+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
+    "subscription_url": "https://api.github.com/repos/hub4j/github-api/subscription",
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+    "git_commits_url": "https://api.github.com/repos/hub4j/github-api/git/commits{/sha}",
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+    "issue_comment_url": "https://api.github.com/repos/hub4j/github-api/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
+    "archive_url": "https://api.github.com/repos/hub4j/github-api/{archive_format}{/ref}",
+    "downloads_url": "https://api.github.com/repos/hub4j/github-api/downloads",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/hub4j/github-api/labels{/name}",
+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
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+    "license": {
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+      "spdx_id": "MIT",
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+      "node_id": "MDc6TGljZW5zZTEz"
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+    "default_branch": "master"
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+}
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api-7.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api-7.json
new file mode 100644
index 0000000000..a4cc0911ba
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api-7.json
@@ -0,0 +1,332 @@
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+  "node_id": "MDEwOlJlcG9zaXRvcnkyMDY4ODgyMDE=",
+  "name": "github-api",
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+  "owner": {
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+    "id": 7544739,
+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Resetting",
+  "fork": true,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+  "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
+  "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
+  "blobs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/blobs{/sha}",
+  "git_tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/tags{/sha}",
+  "git_refs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/refs{/sha}",
+  "trees_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/trees{/sha}",
+  "statuses_url": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/{sha}",
+  "languages_url": "https://api.github.com/repos/hub4j-test-org/github-api/languages",
+  "stargazers_url": "https://api.github.com/repos/hub4j-test-org/github-api/stargazers",
+  "contributors_url": "https://api.github.com/repos/hub4j-test-org/github-api/contributors",
+  "subscribers_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscribers",
+  "subscription_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscription",
+  "commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/commits{/sha}",
+  "git_commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/commits{/sha}",
+  "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/comments{/number}",
+  "issue_comment_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/comments{/number}",
+  "contents_url": "https://api.github.com/repos/hub4j-test-org/github-api/contents/{+path}",
+  "compare_url": "https://api.github.com/repos/hub4j-test-org/github-api/compare/{base}...{head}",
+  "merges_url": "https://api.github.com/repos/hub4j-test-org/github-api/merges",
+  "archive_url": "https://api.github.com/repos/hub4j-test-org/github-api/{archive_format}{/ref}",
+  "downloads_url": "https://api.github.com/repos/hub4j-test-org/github-api/downloads",
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+  "pulls_url": "https://api.github.com/repos/hub4j-test-org/github-api/pulls{/number}",
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+  "notifications_url": "https://api.github.com/repos/hub4j-test-org/github-api/notifications{?since,all,participating}",
+  "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/labels{/name}",
+  "releases_url": "https://api.github.com/repos/hub4j-test-org/github-api/releases{/id}",
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+  "license": {
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+  "default_branch": "master",
+  "permissions": {
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+    "push": true,
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+  "allow_squash_merge": true,
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+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
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+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
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+  "parent": {
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+    "node_id": "MDEwOlJlcG9zaXRvcnk2MTcyMTA=",
+    "name": "github-api",
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+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
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+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api_issues_427_labels-6.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api_issues_427_labels-6.json
new file mode 100644
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api_issues_427_labels-9.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api_issues_427_labels-9.json
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index 0000000000..52880bb420
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api_pulls-4.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api_pulls-4.json
new file mode 100644
index 0000000000..67a1fcff8f
--- /dev/null
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api_pulls_427-8.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/repos_hub4j-test-org_github-api_pulls_427-8.json
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/user-1.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/user-1.json
new file mode 100644
index 0000000000..f09a0cbb5b
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/__files/user-1.json
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/orgs_hub4j-test-org-2.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/orgs_hub4j-test-org-2.json
new file mode 100644
index 0000000000..28b5816b7d
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/orgs_hub4j-test-org-2.json
@@ -0,0 +1,46 @@
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+    "method": "GET",
+    "headers": {
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+    "bodyFileName": "orgs_hub4j-test-org-2.json",
+    "headers": {
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+      "Content-Type": "application/json; charset=utf-8",
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+      "Vary": [
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+        "Accept-Encoding, Accept, X-Requested-With"
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+      "ETag": "W/\"8d03272a59bcf3983cb9122b62f919c03829bc402e1306b087a70015b94507ea\"",
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api-3.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api-3.json
new file mode 100644
index 0000000000..a74479f755
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+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api-3.json
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+{
+  "id": "b321121e-5eec-460d-8717-6aedbcaf963c",
+  "name": "repos_hub4j-test-org_github-api",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api-3.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:53:58 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
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+      "ETag": "W/\"e19e79c782692697a1cf15934643f557a23ab57e363a5d7efef4a98b0cd28b6f\"",
+      "Last-Modified": "Fri, 22 Jan 2021 03:50:37 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "repo",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4977",
+      "X-RateLimit-Reset": "1615604003",
+      "X-RateLimit-Used": "23",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C596:3EFB:4DAB15:533092:604C1B36"
+    }
+  },
+  "uuid": "b321121e-5eec-460d-8717-6aedbcaf963c",
+  "persistent": true,
+  "scenarioName": "scenario-1-repos-hub4j-test-org-github-api",
+  "requiredScenarioState": "Started",
+  "newScenarioState": "scenario-1-repos-hub4j-test-org-github-api-2",
+  "insertionIndex": 3
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api-7.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api-7.json
new file mode 100644
index 0000000000..48ead9e3b8
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api-7.json
@@ -0,0 +1,48 @@
+{
+  "id": "c637ff98-e38a-4057-97ae-461884dbeea9",
+  "name": "repos_hub4j-test-org_github-api",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api-7.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:54:00 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"a88c949ca88518c6341476ee1f6f47f86bb86fd0a3216696c67af4ceb28afcc7\"",
+      "Last-Modified": "Fri, 22 Jan 2021 03:50:37 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "repo",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4973",
+      "X-RateLimit-Reset": "1615604003",
+      "X-RateLimit-Used": "27",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C596:3EFB:4DABB1:533144:604C1B37"
+    }
+  },
+  "uuid": "c637ff98-e38a-4057-97ae-461884dbeea9",
+  "persistent": true,
+  "scenarioName": "scenario-1-repos-hub4j-test-org-github-api",
+  "requiredScenarioState": "scenario-1-repos-hub4j-test-org-github-api-2",
+  "insertionIndex": 7
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-5.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-5.json
new file mode 100644
index 0000000000..8348df73be
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-5.json
@@ -0,0 +1,55 @@
+{
+  "id": "3eb12555-549d-40a4-a2a2-768a52f19f45",
+  "name": "repos_hub4j-test-org_github-api_issues_427_labels",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/427/labels",
+    "method": "POST",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"labels\":[\"addLabels_label_name_1\"]}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 200,
+    "body": "[{\"id\":2806272360,\"node_id\":\"MDU6TGFiZWwyODA2MjcyMzYw\",\"url\":\"https://api.github.com/repos/hub4j-test-org/github-api/labels/addLabels_label_name_1\",\"name\":\"addLabels_label_name_1\",\"color\":\"ededed\",\"default\":false,\"description\":null}]",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:53:59 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"5ee589724d8bcbfb03a8177190eb68d2ad8592678e9f6960177ae5a8fb8015c7\"",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4975",
+      "X-RateLimit-Reset": "1615604003",
+      "X-RateLimit-Used": "25",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C596:3EFB:4DAB68:5330F0:604C1B37"
+    }
+  },
+  "uuid": "3eb12555-549d-40a4-a2a2-768a52f19f45",
+  "persistent": true,
+  "scenarioName": "scenario-2-repos-hub4j-test-org-github-api-issues-427-labels",
+  "requiredScenarioState": "Started",
+  "newScenarioState": "scenario-2-repos-hub4j-test-org-github-api-issues-427-labels-2",
+  "insertionIndex": 5
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-6.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-6.json
new file mode 100644
index 0000000000..36a202a74f
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-6.json
@@ -0,0 +1,52 @@
+{
+  "id": "9bd9b0f1-d876-45dd-98c7-c551a4115633",
+  "name": "repos_hub4j-test-org_github-api_issues_427_labels",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/427/labels",
+    "method": "POST",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"labels\":[\"addLabels_label_name_2\",\"addLabels_label_name_3\"]}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_issues_427_labels-6.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:53:59 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"2f80c320a0edd8f013bcc0faf5052d1c2b2ec1b738c44a1bbe92bb1edb5ac93f\"",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4974",
+      "X-RateLimit-Reset": "1615604003",
+      "X-RateLimit-Used": "26",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C596:3EFB:4DAB90:533119:604C1B37"
+    }
+  },
+  "uuid": "9bd9b0f1-d876-45dd-98c7-c551a4115633",
+  "persistent": true,
+  "insertionIndex": 6
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-9.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-9.json
new file mode 100644
index 0000000000..d6a76747fb
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_issues_427_labels-9.json
@@ -0,0 +1,54 @@
+{
+  "id": "3d7c7ea1-fe75-4a59-a2c0-73bc38a3d299",
+  "name": "repos_hub4j-test-org_github-api_issues_427_labels",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/427/labels",
+    "method": "POST",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"labels\":[\"addLabels_label_name_1\"]}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_issues_427_labels-9.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:54:00 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"2f80c320a0edd8f013bcc0faf5052d1c2b2ec1b738c44a1bbe92bb1edb5ac93f\"",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4971",
+      "X-RateLimit-Reset": "1615604003",
+      "X-RateLimit-Used": "29",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C596:3EFB:4DABED:533190:604C1B38"
+    }
+  },
+  "uuid": "3d7c7ea1-fe75-4a59-a2c0-73bc38a3d299",
+  "persistent": true,
+  "scenarioName": "scenario-2-repos-hub4j-test-org-github-api-issues-427-labels",
+  "requiredScenarioState": "scenario-2-repos-hub4j-test-org-github-api-issues-427-labels-2",
+  "insertionIndex": 9
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_pulls-4.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_pulls-4.json
new file mode 100644
index 0000000000..4eda36780d
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_pulls-4.json
@@ -0,0 +1,53 @@
+{
+  "id": "78c26535-9327-4419-9814-a773eb7edf0c",
+  "name": "repos_hub4j-test-org_github-api_pulls",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/pulls",
+    "method": "POST",
+    "headers": {
+      "Accept": {
+        "equalTo": "application/vnd.github.shadow-cat-preview+json"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"head\":\"test/stable\",\"draft\":false,\"maintainer_can_modify\":true,\"title\":\"addLabels\",\"body\":\"## test\",\"base\":\"master\"}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 201,
+    "bodyFileName": "repos_hub4j-test-org_github-api_pulls-4.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:53:59 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "\"a6bd1620ffa3d594641e7768679b1b8f66671eba8931acf4774e8efe0f4f2b03\"",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "github.v3; param=shadow-cat-preview; format=json",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4976",
+      "X-RateLimit-Reset": "1615604003",
+      "X-RateLimit-Used": "24",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C596:3EFB:4DAB21:5330A6:604C1B36",
+      "Location": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/427"
+    }
+  },
+  "uuid": "78c26535-9327-4419-9814-a773eb7edf0c",
+  "persistent": true,
+  "insertionIndex": 4
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_pulls_427-8.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_pulls_427-8.json
new file mode 100644
index 0000000000..737d8fa603
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/repos_hub4j-test-org_github-api_pulls_427-8.json
@@ -0,0 +1,46 @@
+{
+  "id": "9294cf92-f4df-471f-98f8-a213ed51b636",
+  "name": "repos_hub4j-test-org_github-api_pulls_427",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/pulls/427",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "application/vnd.github.shadow-cat-preview+json"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_pulls_427-8.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:54:00 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"a62e3640060d49dba631652313501f39e107aea3ae5eff85462b5d55965132b5\"",
+      "Last-Modified": "Sat, 13 Mar 2021 01:53:59 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "github.v3; param=shadow-cat-preview; format=json",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4972",
+      "X-RateLimit-Reset": "1615604003",
+      "X-RateLimit-Used": "28",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C596:3EFB:4DABCD:533161:604C1B38"
+    }
+  },
+  "uuid": "9294cf92-f4df-471f-98f8-a213ed51b636",
+  "persistent": true,
+  "insertionIndex": 8
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/user-1.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/user-1.json
new file mode 100644
index 0000000000..19e303f80b
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabels/mappings/user-1.json
@@ -0,0 +1,46 @@
+{
+  "id": "f0177d94-b6bb-44ee-939a-6a5acff831b8",
+  "name": "user",
+  "request": {
+    "url": "/user",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "user-1.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:53:57 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"2822a9e2f360a7908be6027a75d37eebff6e63fc94c67aceefb1e25113b3240e\"",
+      "Last-Modified": "Sat, 13 Mar 2021 00:53:04 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4983",
+      "X-RateLimit-Reset": "1615604003",
+      "X-RateLimit-Used": "17",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C596:3EFB:4DAAB7:533032:604C1B35"
+    }
+  },
+  "uuid": "f0177d94-b6bb-44ee-939a-6a5acff831b8",
+  "persistent": true,
+  "insertionIndex": 1
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/orgs_hub4j-test-org-2.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/orgs_hub4j-test-org-2.json
new file mode 100644
index 0000000000..22e315897d
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/orgs_hub4j-test-org-2.json
@@ -0,0 +1,50 @@
+{
+  "login": "hub4j-test-org",
+  "id": 7544739,
+  "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+  "url": "https://api.github.com/orgs/hub4j-test-org",
+  "repos_url": "https://api.github.com/orgs/hub4j-test-org/repos",
+  "events_url": "https://api.github.com/orgs/hub4j-test-org/events",
+  "hooks_url": "https://api.github.com/orgs/hub4j-test-org/hooks",
+  "issues_url": "https://api.github.com/orgs/hub4j-test-org/issues",
+  "members_url": "https://api.github.com/orgs/hub4j-test-org/members{/member}",
+  "public_members_url": "https://api.github.com/orgs/hub4j-test-org/public_members{/member}",
+  "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+  "description": "Hub4j Test Org Description (this could be null or blank too)",
+  "name": "Hub4j Test Org Name (this could be null or blank too)",
+  "company": null,
+  "blog": "https://hub4j.url.io/could/be/null",
+  "location": "Hub4j Test Org Location (this could be null or blank too)",
+  "email": "hub4jtestorgemail@could.be.null.com",
+  "twitter_username": null,
+  "is_verified": false,
+  "has_organization_projects": true,
+  "has_repository_projects": true,
+  "public_repos": 12,
+  "public_gists": 0,
+  "followers": 0,
+  "following": 0,
+  "html_url": "https://github.com/hub4j-test-org",
+  "created_at": "2014-05-10T19:39:11Z",
+  "updated_at": "2020-06-04T05:56:10Z",
+  "type": "Organization",
+  "total_private_repos": 2,
+  "owned_private_repos": 2,
+  "private_gists": 0,
+  "disk_usage": 154,
+  "collaborators": 0,
+  "billing_email": "kk@kohsuke.org",
+  "default_repository_permission": "none",
+  "members_can_create_repositories": false,
+  "two_factor_requirement_enabled": false,
+  "members_can_create_pages": true,
+  "members_can_create_public_pages": true,
+  "members_can_create_private_pages": true,
+  "plan": {
+    "name": "free",
+    "space": 976562499,
+    "private_repos": 10000,
+    "filled_seats": 22,
+    "seats": 3
+  }
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-3.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-3.json
new file mode 100644
index 0000000000..72a9864575
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-3.json
@@ -0,0 +1,332 @@
+{
+  "id": 206888201,
+  "node_id": "MDEwOlJlcG9zaXRvcnkyMDY4ODgyMDE=",
+  "name": "github-api",
+  "full_name": "hub4j-test-org/github-api",
+  "private": false,
+  "owner": {
+    "login": "hub4j-test-org",
+    "id": 7544739,
+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Resetting",
+  "fork": true,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+  "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
+  "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
+  "blobs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/blobs{/sha}",
+  "git_tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/tags{/sha}",
+  "git_refs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/refs{/sha}",
+  "trees_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/trees{/sha}",
+  "statuses_url": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/{sha}",
+  "languages_url": "https://api.github.com/repos/hub4j-test-org/github-api/languages",
+  "stargazers_url": "https://api.github.com/repos/hub4j-test-org/github-api/stargazers",
+  "contributors_url": "https://api.github.com/repos/hub4j-test-org/github-api/contributors",
+  "subscribers_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscribers",
+  "subscription_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscription",
+  "commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/commits{/sha}",
+  "git_commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/commits{/sha}",
+  "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/comments{/number}",
+  "issue_comment_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/comments{/number}",
+  "contents_url": "https://api.github.com/repos/hub4j-test-org/github-api/contents/{+path}",
+  "compare_url": "https://api.github.com/repos/hub4j-test-org/github-api/compare/{base}...{head}",
+  "merges_url": "https://api.github.com/repos/hub4j-test-org/github-api/merges",
+  "archive_url": "https://api.github.com/repos/hub4j-test-org/github-api/{archive_format}{/ref}",
+  "downloads_url": "https://api.github.com/repos/hub4j-test-org/github-api/downloads",
+  "issues_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues{/number}",
+  "pulls_url": "https://api.github.com/repos/hub4j-test-org/github-api/pulls{/number}",
+  "milestones_url": "https://api.github.com/repos/hub4j-test-org/github-api/milestones{/number}",
+  "notifications_url": "https://api.github.com/repos/hub4j-test-org/github-api/notifications{?since,all,participating}",
+  "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/labels{/name}",
+  "releases_url": "https://api.github.com/repos/hub4j-test-org/github-api/releases{/id}",
+  "deployments_url": "https://api.github.com/repos/hub4j-test-org/github-api/deployments",
+  "created_at": "2019-09-06T23:26:04Z",
+  "updated_at": "2021-01-22T03:50:37Z",
+  "pushed_at": "2021-03-10T12:52:16Z",
+  "git_url": "git://github.com/hub4j-test-org/github-api.git",
+  "ssh_url": "git@github.com:hub4j-test-org/github-api.git",
+  "clone_url": "https://github.com/hub4j-test-org/github-api.git",
+  "svn_url": "https://github.com/hub4j-test-org/github-api",
+  "homepage": "http://github-api.kohsuke.org/",
+  "size": 19052,
+  "stargazers_count": 0,
+  "watchers_count": 0,
+  "language": "Java",
+  "has_issues": true,
+  "has_projects": true,
+  "has_downloads": true,
+  "has_wiki": true,
+  "has_pages": false,
+  "forks_count": 0,
+  "mirror_url": null,
+  "archived": false,
+  "disabled": false,
+  "open_issues_count": 5,
+  "license": {
+    "key": "mit",
+    "name": "MIT License",
+    "spdx_id": "MIT",
+    "url": "https://api.github.com/licenses/mit",
+    "node_id": "MDc6TGljZW5zZTEz"
+  },
+  "forks": 0,
+  "open_issues": 5,
+  "watchers": 0,
+  "default_branch": "master",
+  "permissions": {
+    "admin": true,
+    "push": true,
+    "pull": true
+  },
+  "temp_clone_token": "",
+  "allow_squash_merge": true,
+  "allow_merge_commit": true,
+  "allow_rebase_merge": true,
+  "delete_branch_on_merge": false,
+  "organization": {
+    "login": "hub4j-test-org",
+    "id": 7544739,
+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "parent": {
+    "id": 617210,
+    "node_id": "MDEwOlJlcG9zaXRvcnk2MTcyMTA=",
+    "name": "github-api",
+    "full_name": "hub4j/github-api",
+    "private": false,
+    "owner": {
+      "login": "hub4j",
+      "id": 54909825,
+      "node_id": "MDEyOk9yZ2FuaXphdGlvbjU0OTA5ODI1",
+      "avatar_url": "https://avatars.githubusercontent.com/u/54909825?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
+      "followers_url": "https://api.github.com/users/hub4j/followers",
+      "following_url": "https://api.github.com/users/hub4j/following{/other_user}",
+      "gists_url": "https://api.github.com/users/hub4j/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/hub4j/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/hub4j/github-api",
+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
+    "git_refs_url": "https://api.github.com/repos/hub4j/github-api/git/refs{/sha}",
+    "trees_url": "https://api.github.com/repos/hub4j/github-api/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
+    "subscription_url": "https://api.github.com/repos/hub4j/github-api/subscription",
+    "commits_url": "https://api.github.com/repos/hub4j/github-api/commits{/sha}",
+    "git_commits_url": "https://api.github.com/repos/hub4j/github-api/git/commits{/sha}",
+    "comments_url": "https://api.github.com/repos/hub4j/github-api/comments{/number}",
+    "issue_comment_url": "https://api.github.com/repos/hub4j/github-api/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
+    "archive_url": "https://api.github.com/repos/hub4j/github-api/{archive_format}{/ref}",
+    "downloads_url": "https://api.github.com/repos/hub4j/github-api/downloads",
+    "issues_url": "https://api.github.com/repos/hub4j/github-api/issues{/number}",
+    "pulls_url": "https://api.github.com/repos/hub4j/github-api/pulls{/number}",
+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/hub4j/github-api/labels{/name}",
+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
+    "deployments_url": "https://api.github.com/repos/hub4j/github-api/deployments",
+    "created_at": "2010-04-19T04:13:03Z",
+    "updated_at": "2021-03-10T10:27:30Z",
+    "pushed_at": "2021-03-10T02:45:39Z",
+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
+    "svn_url": "https://github.com/hub4j/github-api",
+    "homepage": "https://github-api.kohsuke.org/",
+    "size": 27778,
+    "stargazers_count": 740,
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+    "language": "Java",
+    "has_issues": true,
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+    "archived": false,
+    "disabled": false,
+    "open_issues_count": 77,
+    "license": {
+      "key": "mit",
+      "name": "MIT License",
+      "spdx_id": "MIT",
+      "url": "https://api.github.com/licenses/mit",
+      "node_id": "MDc6TGljZW5zZTEz"
+    },
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+    "open_issues": 77,
+    "watchers": 740,
+    "default_branch": "master"
+  },
+  "source": {
+    "id": 617210,
+    "node_id": "MDEwOlJlcG9zaXRvcnk2MTcyMTA=",
+    "name": "github-api",
+    "full_name": "hub4j/github-api",
+    "private": false,
+    "owner": {
+      "login": "hub4j",
+      "id": 54909825,
+      "node_id": "MDEyOk9yZ2FuaXphdGlvbjU0OTA5ODI1",
+      "avatar_url": "https://avatars.githubusercontent.com/u/54909825?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
+      "followers_url": "https://api.github.com/users/hub4j/followers",
+      "following_url": "https://api.github.com/users/hub4j/following{/other_user}",
+      "gists_url": "https://api.github.com/users/hub4j/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/hub4j/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/hub4j/github-api",
+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
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+    "trees_url": "https://api.github.com/repos/hub4j/github-api/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
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+    "commits_url": "https://api.github.com/repos/hub4j/github-api/commits{/sha}",
+    "git_commits_url": "https://api.github.com/repos/hub4j/github-api/git/commits{/sha}",
+    "comments_url": "https://api.github.com/repos/hub4j/github-api/comments{/number}",
+    "issue_comment_url": "https://api.github.com/repos/hub4j/github-api/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
+    "archive_url": "https://api.github.com/repos/hub4j/github-api/{archive_format}{/ref}",
+    "downloads_url": "https://api.github.com/repos/hub4j/github-api/downloads",
+    "issues_url": "https://api.github.com/repos/hub4j/github-api/issues{/number}",
+    "pulls_url": "https://api.github.com/repos/hub4j/github-api/pulls{/number}",
+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/hub4j/github-api/labels{/name}",
+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
+    "deployments_url": "https://api.github.com/repos/hub4j/github-api/deployments",
+    "created_at": "2010-04-19T04:13:03Z",
+    "updated_at": "2021-03-10T10:27:30Z",
+    "pushed_at": "2021-03-10T02:45:39Z",
+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
+    "svn_url": "https://github.com/hub4j/github-api",
+    "homepage": "https://github-api.kohsuke.org/",
+    "size": 27778,
+    "stargazers_count": 740,
+    "watchers_count": 740,
+    "language": "Java",
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+    "has_projects": true,
+    "has_downloads": true,
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+    "mirror_url": null,
+    "archived": false,
+    "disabled": false,
+    "open_issues_count": 77,
+    "license": {
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+      "name": "MIT License",
+      "spdx_id": "MIT",
+      "url": "https://api.github.com/licenses/mit",
+      "node_id": "MDc6TGljZW5zZTEz"
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+    "open_issues": 77,
+    "watchers": 740,
+    "default_branch": "master"
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+  "subscribers_count": 0
+}
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-5.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-5.json
new file mode 100644
index 0000000000..73c8007a0a
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-5.json
@@ -0,0 +1,332 @@
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+  "node_id": "MDEwOlJlcG9zaXRvcnkyMDY4ODgyMDE=",
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+  "private": false,
+  "owner": {
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+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
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+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Resetting",
+  "fork": true,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+  "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
+  "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
+  "blobs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/blobs{/sha}",
+  "git_tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/tags{/sha}",
+  "git_refs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/refs{/sha}",
+  "trees_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/trees{/sha}",
+  "statuses_url": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/{sha}",
+  "languages_url": "https://api.github.com/repos/hub4j-test-org/github-api/languages",
+  "stargazers_url": "https://api.github.com/repos/hub4j-test-org/github-api/stargazers",
+  "contributors_url": "https://api.github.com/repos/hub4j-test-org/github-api/contributors",
+  "subscribers_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscribers",
+  "subscription_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscription",
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+  "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/comments{/number}",
+  "issue_comment_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/comments{/number}",
+  "contents_url": "https://api.github.com/repos/hub4j-test-org/github-api/contents/{+path}",
+  "compare_url": "https://api.github.com/repos/hub4j-test-org/github-api/compare/{base}...{head}",
+  "merges_url": "https://api.github.com/repos/hub4j-test-org/github-api/merges",
+  "archive_url": "https://api.github.com/repos/hub4j-test-org/github-api/{archive_format}{/ref}",
+  "downloads_url": "https://api.github.com/repos/hub4j-test-org/github-api/downloads",
+  "issues_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues{/number}",
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+  "notifications_url": "https://api.github.com/repos/hub4j-test-org/github-api/notifications{?since,all,participating}",
+  "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/labels{/name}",
+  "releases_url": "https://api.github.com/repos/hub4j-test-org/github-api/releases{/id}",
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+  "allow_merge_commit": true,
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+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
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+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
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+  "parent": {
+    "id": 617210,
+    "node_id": "MDEwOlJlcG9zaXRvcnk2MTcyMTA=",
+    "name": "github-api",
+    "full_name": "hub4j/github-api",
+    "private": false,
+    "owner": {
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+      "id": 54909825,
+      "node_id": "MDEyOk9yZ2FuaXphdGlvbjU0OTA5ODI1",
+      "avatar_url": "https://avatars.githubusercontent.com/u/54909825?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
+      "followers_url": "https://api.github.com/users/hub4j/followers",
+      "following_url": "https://api.github.com/users/hub4j/following{/other_user}",
+      "gists_url": "https://api.github.com/users/hub4j/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/hub4j/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/hub4j/github-api",
+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
+    "git_refs_url": "https://api.github.com/repos/hub4j/github-api/git/refs{/sha}",
+    "trees_url": "https://api.github.com/repos/hub4j/github-api/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
+    "subscription_url": "https://api.github.com/repos/hub4j/github-api/subscription",
+    "commits_url": "https://api.github.com/repos/hub4j/github-api/commits{/sha}",
+    "git_commits_url": "https://api.github.com/repos/hub4j/github-api/git/commits{/sha}",
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+    "issue_comment_url": "https://api.github.com/repos/hub4j/github-api/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
+    "archive_url": "https://api.github.com/repos/hub4j/github-api/{archive_format}{/ref}",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
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+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "ssh_url": "git@github.com:hub4j/github-api.git",
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+      "html_url": "https://github.com/hub4j",
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+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
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+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
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+    "trees_url": "https://api.github.com/repos/hub4j/github-api/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
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+    "commits_url": "https://api.github.com/repos/hub4j/github-api/commits{/sha}",
+    "git_commits_url": "https://api.github.com/repos/hub4j/github-api/git/commits{/sha}",
+    "comments_url": "https://api.github.com/repos/hub4j/github-api/comments{/number}",
+    "issue_comment_url": "https://api.github.com/repos/hub4j/github-api/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
+    "archive_url": "https://api.github.com/repos/hub4j/github-api/{archive_format}{/ref}",
+    "downloads_url": "https://api.github.com/repos/hub4j/github-api/downloads",
+    "issues_url": "https://api.github.com/repos/hub4j/github-api/issues{/number}",
+    "pulls_url": "https://api.github.com/repos/hub4j/github-api/pulls{/number}",
+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/hub4j/github-api/labels{/name}",
+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
+    "deployments_url": "https://api.github.com/repos/hub4j/github-api/deployments",
+    "created_at": "2010-04-19T04:13:03Z",
+    "updated_at": "2021-03-10T10:27:30Z",
+    "pushed_at": "2021-03-10T02:45:39Z",
+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
+    "svn_url": "https://github.com/hub4j/github-api",
+    "homepage": "https://github-api.kohsuke.org/",
+    "size": 27778,
+    "stargazers_count": 740,
+    "watchers_count": 740,
+    "language": "Java",
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+    "has_projects": true,
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+    "mirror_url": null,
+    "archived": false,
+    "disabled": false,
+    "open_issues_count": 77,
+    "license": {
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+      "name": "MIT License",
+      "spdx_id": "MIT",
+      "url": "https://api.github.com/licenses/mit",
+      "node_id": "MDc6TGljZW5zZTEz"
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+    "open_issues": 77,
+    "watchers": 740,
+    "default_branch": "master"
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+  "subscribers_count": 0
+}
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-9.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-9.json
new file mode 100644
index 0000000000..73c8007a0a
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api-9.json
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+  "private": false,
+  "owner": {
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+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
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+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Resetting",
+  "fork": true,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+  "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
+  "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
+  "blobs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/blobs{/sha}",
+  "git_tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/tags{/sha}",
+  "git_refs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/refs{/sha}",
+  "trees_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/trees{/sha}",
+  "statuses_url": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/{sha}",
+  "languages_url": "https://api.github.com/repos/hub4j-test-org/github-api/languages",
+  "stargazers_url": "https://api.github.com/repos/hub4j-test-org/github-api/stargazers",
+  "contributors_url": "https://api.github.com/repos/hub4j-test-org/github-api/contributors",
+  "subscribers_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscribers",
+  "subscription_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscription",
+  "commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/commits{/sha}",
+  "git_commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/commits{/sha}",
+  "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/comments{/number}",
+  "issue_comment_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/comments{/number}",
+  "contents_url": "https://api.github.com/repos/hub4j-test-org/github-api/contents/{+path}",
+  "compare_url": "https://api.github.com/repos/hub4j-test-org/github-api/compare/{base}...{head}",
+  "merges_url": "https://api.github.com/repos/hub4j-test-org/github-api/merges",
+  "archive_url": "https://api.github.com/repos/hub4j-test-org/github-api/{archive_format}{/ref}",
+  "downloads_url": "https://api.github.com/repos/hub4j-test-org/github-api/downloads",
+  "issues_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues{/number}",
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+  "notifications_url": "https://api.github.com/repos/hub4j-test-org/github-api/notifications{?since,all,participating}",
+  "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/labels{/name}",
+  "releases_url": "https://api.github.com/repos/hub4j-test-org/github-api/releases{/id}",
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+  "allow_merge_commit": true,
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+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
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+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "parent": {
+    "id": 617210,
+    "node_id": "MDEwOlJlcG9zaXRvcnk2MTcyMTA=",
+    "name": "github-api",
+    "full_name": "hub4j/github-api",
+    "private": false,
+    "owner": {
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+      "id": 54909825,
+      "node_id": "MDEyOk9yZ2FuaXphdGlvbjU0OTA5ODI1",
+      "avatar_url": "https://avatars.githubusercontent.com/u/54909825?v=4",
+      "gravatar_id": "",
+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
+      "followers_url": "https://api.github.com/users/hub4j/followers",
+      "following_url": "https://api.github.com/users/hub4j/following{/other_user}",
+      "gists_url": "https://api.github.com/users/hub4j/gists{/gist_id}",
+      "starred_url": "https://api.github.com/users/hub4j/starred{/owner}{/repo}",
+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/hub4j/github-api",
+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
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+    "trees_url": "https://api.github.com/repos/hub4j/github-api/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
+    "subscription_url": "https://api.github.com/repos/hub4j/github-api/subscription",
+    "commits_url": "https://api.github.com/repos/hub4j/github-api/commits{/sha}",
+    "git_commits_url": "https://api.github.com/repos/hub4j/github-api/git/commits{/sha}",
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+    "issue_comment_url": "https://api.github.com/repos/hub4j/github-api/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
+    "archive_url": "https://api.github.com/repos/hub4j/github-api/{archive_format}{/ref}",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/hub4j/github-api/labels{/name}",
+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "ssh_url": "git@github.com:hub4j/github-api.git",
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+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
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+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
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+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
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+    "trees_url": "https://api.github.com/repos/hub4j/github-api/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_issues_417_labels-7.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_issues_417_labels-7.json
new file mode 100644
index 0000000000..0844ae68b7
--- /dev/null
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_issues_417_labels-8.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_issues_417_labels-8.json
new file mode 100644
index 0000000000..1bca9d7e8f
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+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_issues_417_labels-8.json
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_pulls-4.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_pulls-4.json
new file mode 100644
index 0000000000..04beec61d8
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_pulls_417-10.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_pulls_417-10.json
new file mode 100644
index 0000000000..751b12b7e2
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_pulls_417-10.json
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_pulls_417-6.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_pulls_417-6.json
new file mode 100644
index 0000000000..ed59ef80e3
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/repos_hub4j-test-org_github-api_pulls_417-6.json
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+      "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+      "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+      "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+      "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+      "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+      "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+      "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+      "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+      "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
+      "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
+      "blobs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/blobs{/sha}",
+      "git_tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/tags{/sha}",
+      "git_refs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/refs{/sha}",
+      "trees_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/trees{/sha}",
+      "statuses_url": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/{sha}",
+      "languages_url": "https://api.github.com/repos/hub4j-test-org/github-api/languages",
+      "stargazers_url": "https://api.github.com/repos/hub4j-test-org/github-api/stargazers",
+      "contributors_url": "https://api.github.com/repos/hub4j-test-org/github-api/contributors",
+      "subscribers_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscribers",
+      "subscription_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscription",
+      "commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/commits{/sha}",
+      "git_commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/commits{/sha}",
+      "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/comments{/number}",
+      "issue_comment_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/comments{/number}",
+      "contents_url": "https://api.github.com/repos/hub4j-test-org/github-api/contents/{+path}",
+      "compare_url": "https://api.github.com/repos/hub4j-test-org/github-api/compare/{base}...{head}",
+      "merges_url": "https://api.github.com/repos/hub4j-test-org/github-api/merges",
+      "archive_url": "https://api.github.com/repos/hub4j-test-org/github-api/{archive_format}{/ref}",
+      "downloads_url": "https://api.github.com/repos/hub4j-test-org/github-api/downloads",
+      "issues_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues{/number}",
+      "pulls_url": "https://api.github.com/repos/hub4j-test-org/github-api/pulls{/number}",
+      "milestones_url": "https://api.github.com/repos/hub4j-test-org/github-api/milestones{/number}",
+      "notifications_url": "https://api.github.com/repos/hub4j-test-org/github-api/notifications{?since,all,participating}",
+      "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/labels{/name}",
+      "releases_url": "https://api.github.com/repos/hub4j-test-org/github-api/releases{/id}",
+      "deployments_url": "https://api.github.com/repos/hub4j-test-org/github-api/deployments",
+      "created_at": "2019-09-06T23:26:04Z",
+      "updated_at": "2021-01-22T03:50:37Z",
+      "pushed_at": "2021-03-10T12:52:52Z",
+      "git_url": "git://github.com/hub4j-test-org/github-api.git",
+      "ssh_url": "git@github.com:hub4j-test-org/github-api.git",
+      "clone_url": "https://github.com/hub4j-test-org/github-api.git",
+      "svn_url": "https://github.com/hub4j-test-org/github-api",
+      "homepage": "http://github-api.kohsuke.org/",
+      "size": 19052,
+      "stargazers_count": 0,
+      "watchers_count": 0,
+      "language": "Java",
+      "has_issues": true,
+      "has_projects": true,
+      "has_downloads": true,
+      "has_wiki": true,
+      "has_pages": false,
+      "forks_count": 0,
+      "mirror_url": null,
+      "archived": false,
+      "disabled": false,
+      "open_issues_count": 6,
+      "license": {
+        "key": "mit",
+        "name": "MIT License",
+        "spdx_id": "MIT",
+        "url": "https://api.github.com/licenses/mit",
+        "node_id": "MDc6TGljZW5zZTEz"
+      },
+      "forks": 0,
+      "open_issues": 6,
+      "watchers": 0,
+      "default_branch": "master"
+    }
+  },
+  "_links": {
+    "self": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/417"
+    },
+    "html": {
+      "href": "https://github.com/hub4j-test-org/github-api/pull/417"
+    },
+    "issue": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/issues/417"
+    },
+    "comments": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/issues/417/comments"
+    },
+    "review_comments": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/417/comments"
+    },
+    "review_comment": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/comments{/number}"
+    },
+    "commits": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/417/commits"
+    },
+    "statuses": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/1f40fdf4acf1adb246c109c21a22f617e4bd1ca8"
+    }
+  },
+  "author_association": "MEMBER",
+  "auto_merge": null,
+  "active_lock_reason": null,
+  "merged": false,
+  "mergeable": true,
+  "rebaseable": true,
+  "mergeable_state": "unstable",
+  "merged_by": null,
+  "comments": 0,
+  "review_comments": 0,
+  "maintainer_can_modify": false,
+  "commits": 2,
+  "additions": 2,
+  "deletions": 1,
+  "changed_files": 1
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/user-1.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/user-1.json
new file mode 100644
index 0000000000..94efe151bc
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/__files/user-1.json
@@ -0,0 +1,46 @@
+{
+  "login": "gsmet",
+  "id": 1279749,
+  "node_id": "MDQ6VXNlcjEyNzk3NDk=",
+  "avatar_url": "https://avatars.githubusercontent.com/u/1279749?v=4",
+  "gravatar_id": "",
+  "url": "https://api.github.com/users/gsmet",
+  "html_url": "https://github.com/gsmet",
+  "followers_url": "https://api.github.com/users/gsmet/followers",
+  "following_url": "https://api.github.com/users/gsmet/following{/other_user}",
+  "gists_url": "https://api.github.com/users/gsmet/gists{/gist_id}",
+  "starred_url": "https://api.github.com/users/gsmet/starred{/owner}{/repo}",
+  "subscriptions_url": "https://api.github.com/users/gsmet/subscriptions",
+  "organizations_url": "https://api.github.com/users/gsmet/orgs",
+  "repos_url": "https://api.github.com/users/gsmet/repos",
+  "events_url": "https://api.github.com/users/gsmet/events{/privacy}",
+  "received_events_url": "https://api.github.com/users/gsmet/received_events",
+  "type": "User",
+  "site_admin": false,
+  "name": "Guillaume Smet",
+  "company": "Red Hat",
+  "blog": "https://www.redhat.com/",
+  "location": "Lyon, France",
+  "email": "guillaume.smet@gmail.com",
+  "hireable": null,
+  "bio": "Happy camper at Red Hat, working on Quarkus and the Hibernate portfolio.",
+  "twitter_username": "gsmet_",
+  "public_repos": 98,
+  "public_gists": 14,
+  "followers": 126,
+  "following": 3,
+  "created_at": "2011-12-22T11:03:22Z",
+  "updated_at": "2021-03-09T14:33:13Z",
+  "private_gists": 14,
+  "total_private_repos": 5,
+  "owned_private_repos": 2,
+  "disk_usage": 68251,
+  "collaborators": 1,
+  "two_factor_authentication": true,
+  "plan": {
+    "name": "free",
+    "space": 976562499,
+    "collaborators": 0,
+    "private_repos": 10000
+  }
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/orgs_hub4j-test-org-2.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/orgs_hub4j-test-org-2.json
new file mode 100644
index 0000000000..95e2c0dfb8
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/orgs_hub4j-test-org-2.json
@@ -0,0 +1,46 @@
+{
+  "id": "12203044-e152-4b24-ba08-283244ee3201",
+  "name": "orgs_hub4j-test-org",
+  "request": {
+    "url": "/orgs/hub4j-test-org",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "orgs_hub4j-test-org-2.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:51 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"d6f1aee416a47d2dfaf1035d78565b329beaee365900d5a707e780abcb30f9ce\"",
+      "Last-Modified": "Thu, 04 Jun 2020 05:56:10 GMT",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "admin:org, read:org, repo, user, write:org",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4330",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "670",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60D02:710F108:6048C123"
+    }
+  },
+  "uuid": "12203044-e152-4b24-ba08-283244ee3201",
+  "persistent": true,
+  "insertionIndex": 2
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-3.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-3.json
new file mode 100644
index 0000000000..72a679f9e6
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-3.json
@@ -0,0 +1,49 @@
+{
+  "id": "2b1f0d60-f472-44d8-85fc-7734c51fdd03",
+  "name": "repos_hub4j-test-org_github-api",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api-3.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:51 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"d88992dc692d2d4a385c4ae0ef3decd31d4f0b91ff2ea8d5e0d8d64bbcf9ebdb\"",
+      "Last-Modified": "Fri, 22 Jan 2021 03:50:37 GMT",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "repo",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4329",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "671",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60D44:710F146:6048C123"
+    }
+  },
+  "uuid": "2b1f0d60-f472-44d8-85fc-7734c51fdd03",
+  "persistent": true,
+  "scenarioName": "scenario-1-repos-hub4j-test-org-github-api",
+  "requiredScenarioState": "Started",
+  "newScenarioState": "scenario-1-repos-hub4j-test-org-github-api-2",
+  "insertionIndex": 3
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-5.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-5.json
new file mode 100644
index 0000000000..f4f01e9319
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-5.json
@@ -0,0 +1,49 @@
+{
+  "id": "1908c79f-1cb6-4a26-9880-d33702eb2e21",
+  "name": "repos_hub4j-test-org_github-api",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api-5.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:52 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"266548090a77430b351e28ee6d40da67f7549f61e48a76f1a66973f09da49688\"",
+      "Last-Modified": "Fri, 22 Jan 2021 03:50:37 GMT",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "repo",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4327",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "673",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60E55:710F26A:6048C124"
+    }
+  },
+  "uuid": "1908c79f-1cb6-4a26-9880-d33702eb2e21",
+  "persistent": true,
+  "scenarioName": "scenario-1-repos-hub4j-test-org-github-api",
+  "requiredScenarioState": "scenario-1-repos-hub4j-test-org-github-api-2",
+  "newScenarioState": "scenario-1-repos-hub4j-test-org-github-api-3",
+  "insertionIndex": 5
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-9.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-9.json
new file mode 100644
index 0000000000..565991b599
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api-9.json
@@ -0,0 +1,48 @@
+{
+  "id": "c4722154-e4b8-4691-b5ed-f3b8e427b659",
+  "name": "repos_hub4j-test-org_github-api",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api-9.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:54 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"266548090a77430b351e28ee6d40da67f7549f61e48a76f1a66973f09da49688\"",
+      "Last-Modified": "Fri, 22 Jan 2021 03:50:37 GMT",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "repo",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4323",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "677",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60FEE:710F3FA:6048C126"
+    }
+  },
+  "uuid": "c4722154-e4b8-4691-b5ed-f3b8e427b659",
+  "persistent": true,
+  "scenarioName": "scenario-1-repos-hub4j-test-org-github-api",
+  "requiredScenarioState": "scenario-1-repos-hub4j-test-org-github-api-3",
+  "insertionIndex": 9
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_issues_417_labels-7.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_issues_417_labels-7.json
new file mode 100644
index 0000000000..f3007af063
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_issues_417_labels-7.json
@@ -0,0 +1,52 @@
+{
+  "id": "61601b80-6585-4923-be67-1e96131bab55",
+  "name": "repos_hub4j-test-org_github-api_issues_417_labels",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/417/labels",
+    "method": "POST",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"labels\":[\"addLabelsConcurrencyIssue_label_name_2\"]}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_issues_417_labels-7.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:53 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"0c75d3feb716318d91aa51bca59518562949c8a40137e3e3aa02ca09f3a0cf8c\"",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4325",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "675",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60F20:710F321:6048C125"
+    }
+  },
+  "uuid": "61601b80-6585-4923-be67-1e96131bab55",
+  "persistent": true,
+  "insertionIndex": 7
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_issues_417_labels-8.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_issues_417_labels-8.json
new file mode 100644
index 0000000000..5e954a0971
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_issues_417_labels-8.json
@@ -0,0 +1,52 @@
+{
+  "id": "9d170773-0d03-4615-ae4b-890c9c83f542",
+  "name": "repos_hub4j-test-org_github-api_issues_417_labels",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/417/labels",
+    "method": "POST",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"labels\":[\"addLabelsConcurrencyIssue_label_name_1\"]}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_issues_417_labels-8.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:54 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"c2d6175ca2da5eea5ac5a1182ba3aa18d82f1369eb57be18cb8321d814fe3a4a\"",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4324",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "676",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60F86:710F38B:6048C125"
+    }
+  },
+  "uuid": "9d170773-0d03-4615-ae4b-890c9c83f542",
+  "persistent": true,
+  "insertionIndex": 8
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls-4.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls-4.json
new file mode 100644
index 0000000000..0e981fad65
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls-4.json
@@ -0,0 +1,53 @@
+{
+  "id": "58d22be5-a76c-4570-a7e7-f724ddb30ee8",
+  "name": "repos_hub4j-test-org_github-api_pulls",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/pulls",
+    "method": "POST",
+    "headers": {
+      "Accept": {
+        "equalTo": "application/vnd.github.shadow-cat-preview+json"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"head\":\"test/stable\",\"draft\":false,\"maintainer_can_modify\":true,\"title\":\"addLabelsConcurrencyIssue\",\"body\":\"## test\",\"base\":\"master\"}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 201,
+    "bodyFileName": "repos_hub4j-test-org_github-api_pulls-4.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:52 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "\"bbc6a75873c2c83ebd72177752090360a3729f7d12ac578be72196361a736211\"",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "github.v3; param=shadow-cat-preview; format=json",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4328",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "672",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60D8C:710F18E:6048C123",
+      "Location": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/417"
+    }
+  },
+  "uuid": "58d22be5-a76c-4570-a7e7-f724ddb30ee8",
+  "persistent": true,
+  "insertionIndex": 4
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls_417-10.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls_417-10.json
new file mode 100644
index 0000000000..4b3de74609
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls_417-10.json
@@ -0,0 +1,48 @@
+{
+  "id": "e151f6e4-7e5b-4376-9c90-ea1260d3a4ea",
+  "name": "repos_hub4j-test-org_github-api_pulls_417",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/pulls/417",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "application/vnd.github.shadow-cat-preview+json"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_pulls_417-10.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:54 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"71dc423fe27c908d3d9df4de67576cf92ba5e4afd596036d8ea1eec88f6a825f\"",
+      "Last-Modified": "Wed, 10 Mar 2021 12:52:54 GMT",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "github.v3; param=shadow-cat-preview; format=json",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4322",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "678",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E61038:710F448:6048C126"
+    }
+  },
+  "uuid": "e151f6e4-7e5b-4376-9c90-ea1260d3a4ea",
+  "persistent": true,
+  "scenarioName": "scenario-2-repos-hub4j-test-org-github-api-pulls-417",
+  "requiredScenarioState": "scenario-2-repos-hub4j-test-org-github-api-pulls-417-2",
+  "insertionIndex": 10
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls_417-6.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls_417-6.json
new file mode 100644
index 0000000000..c47fac866a
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/repos_hub4j-test-org_github-api_pulls_417-6.json
@@ -0,0 +1,49 @@
+{
+  "id": "549ba01c-bee7-4094-b47a-be951b6fab5d",
+  "name": "repos_hub4j-test-org_github-api_pulls_417",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/pulls/417",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "application/vnd.github.shadow-cat-preview+json"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_pulls_417-6.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:53 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"6e97fcee0bff3c6ed16fe8089f46430ab5d82e5bcd5b6be391e7115f13380775\"",
+      "Last-Modified": "Wed, 10 Mar 2021 12:52:52 GMT",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "github.v3; param=shadow-cat-preview; format=json",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4326",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "674",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60EB3:710F2B2:6048C124"
+    }
+  },
+  "uuid": "549ba01c-bee7-4094-b47a-be951b6fab5d",
+  "persistent": true,
+  "scenarioName": "scenario-2-repos-hub4j-test-org-github-api-pulls-417",
+  "requiredScenarioState": "Started",
+  "newScenarioState": "scenario-2-repos-hub4j-test-org-github-api-pulls-417-2",
+  "insertionIndex": 6
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/user-1.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/user-1.json
new file mode 100644
index 0000000000..7f0bf692f8
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/addLabelsConcurrencyIssue/mappings/user-1.json
@@ -0,0 +1,46 @@
+{
+  "id": "e84ef91c-2bdb-44d6-b340-b6ae6c4b62ed",
+  "name": "user",
+  "request": {
+    "url": "/user",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "user-1.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Wed, 10 Mar 2021 12:52:50 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"ae9f81b98579088c92fa7db16f009a42ddbc9ba377a0fd2f76ebe38bcee68a2f\"",
+      "Last-Modified": "Tue, 09 Mar 2021 14:33:13 GMT",
+      "X-OAuth-Scopes": "repo, user",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4335",
+      "X-RateLimit-Reset": "1615382444",
+      "X-RateLimit-Used": "665",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "B740:EEFC:6E60BE4:710EFE4:6048C122"
+    }
+  },
+  "uuid": "e84ef91c-2bdb-44d6-b340-b6ae6c4b62ed",
+  "persistent": true,
+  "insertionIndex": 1
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/orgs_hub4j-test-org-2.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/orgs_hub4j-test-org-2.json
new file mode 100644
index 0000000000..22e315897d
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/orgs_hub4j-test-org-2.json
@@ -0,0 +1,50 @@
+{
+  "login": "hub4j-test-org",
+  "id": 7544739,
+  "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+  "url": "https://api.github.com/orgs/hub4j-test-org",
+  "repos_url": "https://api.github.com/orgs/hub4j-test-org/repos",
+  "events_url": "https://api.github.com/orgs/hub4j-test-org/events",
+  "hooks_url": "https://api.github.com/orgs/hub4j-test-org/hooks",
+  "issues_url": "https://api.github.com/orgs/hub4j-test-org/issues",
+  "members_url": "https://api.github.com/orgs/hub4j-test-org/members{/member}",
+  "public_members_url": "https://api.github.com/orgs/hub4j-test-org/public_members{/member}",
+  "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+  "description": "Hub4j Test Org Description (this could be null or blank too)",
+  "name": "Hub4j Test Org Name (this could be null or blank too)",
+  "company": null,
+  "blog": "https://hub4j.url.io/could/be/null",
+  "location": "Hub4j Test Org Location (this could be null or blank too)",
+  "email": "hub4jtestorgemail@could.be.null.com",
+  "twitter_username": null,
+  "is_verified": false,
+  "has_organization_projects": true,
+  "has_repository_projects": true,
+  "public_repos": 12,
+  "public_gists": 0,
+  "followers": 0,
+  "following": 0,
+  "html_url": "https://github.com/hub4j-test-org",
+  "created_at": "2014-05-10T19:39:11Z",
+  "updated_at": "2020-06-04T05:56:10Z",
+  "type": "Organization",
+  "total_private_repos": 2,
+  "owned_private_repos": 2,
+  "private_gists": 0,
+  "disk_usage": 154,
+  "collaborators": 0,
+  "billing_email": "kk@kohsuke.org",
+  "default_repository_permission": "none",
+  "members_can_create_repositories": false,
+  "two_factor_requirement_enabled": false,
+  "members_can_create_pages": true,
+  "members_can_create_public_pages": true,
+  "members_can_create_private_pages": true,
+  "plan": {
+    "name": "free",
+    "space": 976562499,
+    "private_repos": 10000,
+    "filled_seats": 22,
+    "seats": 3
+  }
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-10.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-10.json
new file mode 100644
index 0000000000..e0b104f70e
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-10.json
@@ -0,0 +1,332 @@
+{
+  "id": 206888201,
+  "node_id": "MDEwOlJlcG9zaXRvcnkyMDY4ODgyMDE=",
+  "name": "github-api",
+  "full_name": "hub4j-test-org/github-api",
+  "private": false,
+  "owner": {
+    "login": "hub4j-test-org",
+    "id": 7544739,
+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Resetting",
+  "fork": true,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+  "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
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+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
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+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
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+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
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+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
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+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/hub4j/github-api/labels{/name}",
+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
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+    "watchers": 740,
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+    "owner": {
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+      "gravatar_id": "",
+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
+      "followers_url": "https://api.github.com/users/hub4j/followers",
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+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/hub4j/github-api",
+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
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+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
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+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
+    "subscription_url": "https://api.github.com/repos/hub4j/github-api/subscription",
+    "commits_url": "https://api.github.com/repos/hub4j/github-api/commits{/sha}",
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+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
+    "archive_url": "https://api.github.com/repos/hub4j/github-api/{archive_format}{/ref}",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
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+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
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+    "homepage": "https://github-api.kohsuke.org/",
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+    "license": {
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+      "spdx_id": "MIT",
+      "url": "https://api.github.com/licenses/mit",
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+    "default_branch": "master"
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+}
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-3.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-3.json
new file mode 100644
index 0000000000..21a3f4c7a4
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-3.json
@@ -0,0 +1,332 @@
+{
+  "id": 206888201,
+  "node_id": "MDEwOlJlcG9zaXRvcnkyMDY4ODgyMDE=",
+  "name": "github-api",
+  "full_name": "hub4j-test-org/github-api",
+  "private": false,
+  "owner": {
+    "login": "hub4j-test-org",
+    "id": 7544739,
+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Resetting",
+  "fork": true,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
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+  "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
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+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
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+      "type": "Organization",
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+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
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+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
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+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
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+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
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+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/hub4j/github-api/labels{/name}",
+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
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+    "watchers": 740,
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+    "owner": {
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+      "node_id": "MDEyOk9yZ2FuaXphdGlvbjU0OTA5ODI1",
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+      "gravatar_id": "",
+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
+      "followers_url": "https://api.github.com/users/hub4j/followers",
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+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
+    },
+    "html_url": "https://github.com/hub4j/github-api",
+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
+    "keys_url": "https://api.github.com/repos/hub4j/github-api/keys{/key_id}",
+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
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+    "trees_url": "https://api.github.com/repos/hub4j/github-api/git/trees{/sha}",
+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
+    "subscription_url": "https://api.github.com/repos/hub4j/github-api/subscription",
+    "commits_url": "https://api.github.com/repos/hub4j/github-api/commits{/sha}",
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+    "issue_comment_url": "https://api.github.com/repos/hub4j/github-api/issues/comments{/number}",
+    "contents_url": "https://api.github.com/repos/hub4j/github-api/contents/{+path}",
+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
+    "merges_url": "https://api.github.com/repos/hub4j/github-api/merges",
+    "archive_url": "https://api.github.com/repos/hub4j/github-api/{archive_format}{/ref}",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
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+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
+    "svn_url": "https://github.com/hub4j/github-api",
+    "homepage": "https://github-api.kohsuke.org/",
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+    "license": {
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+      "spdx_id": "MIT",
+      "url": "https://api.github.com/licenses/mit",
+      "node_id": "MDc6TGljZW5zZTEz"
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+    "default_branch": "master"
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+}
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-6.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-6.json
new file mode 100644
index 0000000000..e0b104f70e
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api-6.json
@@ -0,0 +1,332 @@
+{
+  "id": 206888201,
+  "node_id": "MDEwOlJlcG9zaXRvcnkyMDY4ODgyMDE=",
+  "name": "github-api",
+  "full_name": "hub4j-test-org/github-api",
+  "private": false,
+  "owner": {
+    "login": "hub4j-test-org",
+    "id": 7544739,
+    "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "Organization",
+    "site_admin": false
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Resetting",
+  "fork": true,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+  "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
+  "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
+  "blobs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/blobs{/sha}",
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+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
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+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
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+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
+    "labels_url": "https://api.github.com/repos/hub4j/github-api/labels{/name}",
+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
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+      "gravatar_id": "",
+      "url": "https://api.github.com/users/hub4j",
+      "html_url": "https://github.com/hub4j",
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+      "subscriptions_url": "https://api.github.com/users/hub4j/subscriptions",
+      "organizations_url": "https://api.github.com/users/hub4j/orgs",
+      "repos_url": "https://api.github.com/users/hub4j/repos",
+      "events_url": "https://api.github.com/users/hub4j/events{/privacy}",
+      "received_events_url": "https://api.github.com/users/hub4j/received_events",
+      "type": "Organization",
+      "site_admin": false
+    },
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+    "description": "Java API for GitHub",
+    "fork": false,
+    "url": "https://api.github.com/repos/hub4j/github-api",
+    "forks_url": "https://api.github.com/repos/hub4j/github-api/forks",
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+    "collaborators_url": "https://api.github.com/repos/hub4j/github-api/collaborators{/collaborator}",
+    "teams_url": "https://api.github.com/repos/hub4j/github-api/teams",
+    "hooks_url": "https://api.github.com/repos/hub4j/github-api/hooks",
+    "issue_events_url": "https://api.github.com/repos/hub4j/github-api/issues/events{/number}",
+    "events_url": "https://api.github.com/repos/hub4j/github-api/events",
+    "assignees_url": "https://api.github.com/repos/hub4j/github-api/assignees{/user}",
+    "branches_url": "https://api.github.com/repos/hub4j/github-api/branches{/branch}",
+    "tags_url": "https://api.github.com/repos/hub4j/github-api/tags",
+    "blobs_url": "https://api.github.com/repos/hub4j/github-api/git/blobs{/sha}",
+    "git_tags_url": "https://api.github.com/repos/hub4j/github-api/git/tags{/sha}",
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+    "statuses_url": "https://api.github.com/repos/hub4j/github-api/statuses/{sha}",
+    "languages_url": "https://api.github.com/repos/hub4j/github-api/languages",
+    "stargazers_url": "https://api.github.com/repos/hub4j/github-api/stargazers",
+    "contributors_url": "https://api.github.com/repos/hub4j/github-api/contributors",
+    "subscribers_url": "https://api.github.com/repos/hub4j/github-api/subscribers",
+    "subscription_url": "https://api.github.com/repos/hub4j/github-api/subscription",
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+    "compare_url": "https://api.github.com/repos/hub4j/github-api/compare/{base}...{head}",
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+    "milestones_url": "https://api.github.com/repos/hub4j/github-api/milestones{/number}",
+    "notifications_url": "https://api.github.com/repos/hub4j/github-api/notifications{?since,all,participating}",
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+    "releases_url": "https://api.github.com/repos/hub4j/github-api/releases{/id}",
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+    "git_url": "git://github.com/hub4j/github-api.git",
+    "ssh_url": "git@github.com:hub4j/github-api.git",
+    "clone_url": "https://github.com/hub4j/github-api.git",
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+    "license": {
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+}
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_issues_425-5.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_issues_425-5.json
new file mode 100644
index 0000000000..bbf2ea5cad
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_issues_425-5.json
@@ -0,0 +1,81 @@
+{
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/425",
+  "repository_url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/425/labels{/name}",
+  "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/425/comments",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/425/events",
+  "html_url": "https://github.com/hub4j-test-org/github-api/pull/425",
+  "id": 830772511,
+  "node_id": "MDExOlB1bGxSZXF1ZXN0NTkyMjY0Mjkx",
+  "number": 425,
+  "title": "removeLabels",
+  "user": {
+    "login": "bitwiseman",
+    "id": 1958953,
+    "node_id": "MDQ6VXNlcjE5NTg5NTM=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/1958953?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/bitwiseman",
+    "html_url": "https://github.com/bitwiseman",
+    "followers_url": "https://api.github.com/users/bitwiseman/followers",
+    "following_url": "https://api.github.com/users/bitwiseman/following{/other_user}",
+    "gists_url": "https://api.github.com/users/bitwiseman/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/bitwiseman/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/bitwiseman/subscriptions",
+    "organizations_url": "https://api.github.com/users/bitwiseman/orgs",
+    "repos_url": "https://api.github.com/users/bitwiseman/repos",
+    "events_url": "https://api.github.com/users/bitwiseman/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/bitwiseman/received_events",
+    "type": "User",
+    "site_admin": false
+  },
+  "labels": [
+    {
+      "id": 2806271705,
+      "node_id": "MDU6TGFiZWwyODA2MjcxNzA1",
+      "url": "https://api.github.com/repos/hub4j-test-org/github-api/labels/removeLabels_label_name_1",
+      "name": "removeLabels_label_name_1",
+      "color": "ededed",
+      "default": false,
+      "description": null
+    },
+    {
+      "id": 2806271708,
+      "node_id": "MDU6TGFiZWwyODA2MjcxNzA4",
+      "url": "https://api.github.com/repos/hub4j-test-org/github-api/labels/removeLabels_label_name_2",
+      "name": "removeLabels_label_name_2",
+      "color": "ededed",
+      "default": false,
+      "description": null
+    },
+    {
+      "id": 2806271711,
+      "node_id": "MDU6TGFiZWwyODA2MjcxNzEx",
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_2-8.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_2-8.json
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_pulls-4.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_pulls-4.json
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_pulls_425-11.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_pulls_425-11.json
new file mode 100644
index 0000000000..dca8e7aa16
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_pulls_425-7.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/repos_hub4j-test-org_github-api_pulls_425-7.json
new file mode 100644
index 0000000000..6caa1503d3
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+      "git_commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/commits{/sha}",
+      "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/comments{/number}",
+      "issue_comment_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/comments{/number}",
+      "contents_url": "https://api.github.com/repos/hub4j-test-org/github-api/contents/{+path}",
+      "compare_url": "https://api.github.com/repos/hub4j-test-org/github-api/compare/{base}...{head}",
+      "merges_url": "https://api.github.com/repos/hub4j-test-org/github-api/merges",
+      "archive_url": "https://api.github.com/repos/hub4j-test-org/github-api/{archive_format}{/ref}",
+      "downloads_url": "https://api.github.com/repos/hub4j-test-org/github-api/downloads",
+      "issues_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues{/number}",
+      "pulls_url": "https://api.github.com/repos/hub4j-test-org/github-api/pulls{/number}",
+      "milestones_url": "https://api.github.com/repos/hub4j-test-org/github-api/milestones{/number}",
+      "notifications_url": "https://api.github.com/repos/hub4j-test-org/github-api/notifications{?since,all,participating}",
+      "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/labels{/name}",
+      "releases_url": "https://api.github.com/repos/hub4j-test-org/github-api/releases{/id}",
+      "deployments_url": "https://api.github.com/repos/hub4j-test-org/github-api/deployments",
+      "created_at": "2019-09-06T23:26:04Z",
+      "updated_at": "2021-01-22T03:50:37Z",
+      "pushed_at": "2021-03-13T01:48:43Z",
+      "git_url": "git://github.com/hub4j-test-org/github-api.git",
+      "ssh_url": "git@github.com:hub4j-test-org/github-api.git",
+      "clone_url": "https://github.com/hub4j-test-org/github-api.git",
+      "svn_url": "https://github.com/hub4j-test-org/github-api",
+      "homepage": "http://github-api.kohsuke.org/",
+      "size": 19052,
+      "stargazers_count": 0,
+      "watchers_count": 0,
+      "language": "Java",
+      "has_issues": true,
+      "has_projects": true,
+      "has_downloads": true,
+      "has_wiki": true,
+      "has_pages": false,
+      "forks_count": 0,
+      "mirror_url": null,
+      "archived": false,
+      "disabled": false,
+      "open_issues_count": 6,
+      "license": {
+        "key": "mit",
+        "name": "MIT License",
+        "spdx_id": "MIT",
+        "url": "https://api.github.com/licenses/mit",
+        "node_id": "MDc6TGljZW5zZTEz"
+      },
+      "forks": 0,
+      "open_issues": 6,
+      "watchers": 0,
+      "default_branch": "master"
+    }
+  },
+  "_links": {
+    "self": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/425"
+    },
+    "html": {
+      "href": "https://github.com/hub4j-test-org/github-api/pull/425"
+    },
+    "issue": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/issues/425"
+    },
+    "comments": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/issues/425/comments"
+    },
+    "review_comments": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/425/comments"
+    },
+    "review_comment": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/comments{/number}"
+    },
+    "commits": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/425/commits"
+    },
+    "statuses": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/1f40fdf4acf1adb246c109c21a22f617e4bd1ca8"
+    }
+  },
+  "author_association": "MEMBER",
+  "auto_merge": null,
+  "active_lock_reason": null,
+  "merged": false,
+  "mergeable": true,
+  "rebaseable": true,
+  "mergeable_state": "unstable",
+  "merged_by": null,
+  "comments": 0,
+  "review_comments": 0,
+  "maintainer_can_modify": false,
+  "commits": 2,
+  "additions": 2,
+  "deletions": 1,
+  "changed_files": 1
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/user-1.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/user-1.json
new file mode 100644
index 0000000000..f09a0cbb5b
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/__files/user-1.json
@@ -0,0 +1,46 @@
+{
+  "login": "bitwiseman",
+  "id": 1958953,
+  "node_id": "MDQ6VXNlcjE5NTg5NTM=",
+  "avatar_url": "https://avatars.githubusercontent.com/u/1958953?v=4",
+  "gravatar_id": "",
+  "url": "https://api.github.com/users/bitwiseman",
+  "html_url": "https://github.com/bitwiseman",
+  "followers_url": "https://api.github.com/users/bitwiseman/followers",
+  "following_url": "https://api.github.com/users/bitwiseman/following{/other_user}",
+  "gists_url": "https://api.github.com/users/bitwiseman/gists{/gist_id}",
+  "starred_url": "https://api.github.com/users/bitwiseman/starred{/owner}{/repo}",
+  "subscriptions_url": "https://api.github.com/users/bitwiseman/subscriptions",
+  "organizations_url": "https://api.github.com/users/bitwiseman/orgs",
+  "repos_url": "https://api.github.com/users/bitwiseman/repos",
+  "events_url": "https://api.github.com/users/bitwiseman/events{/privacy}",
+  "received_events_url": "https://api.github.com/users/bitwiseman/received_events",
+  "type": "User",
+  "site_admin": false,
+  "name": "Liam Newman",
+  "company": "Cloudbees, Inc.",
+  "blog": "",
+  "location": "Seattle, WA, USA",
+  "email": "bitwiseman@gmail.com",
+  "hireable": null,
+  "bio": null,
+  "twitter_username": "bitwiseman",
+  "public_repos": 204,
+  "public_gists": 8,
+  "followers": 181,
+  "following": 11,
+  "created_at": "2012-07-11T20:38:33Z",
+  "updated_at": "2021-03-13T00:53:04Z",
+  "private_gists": 19,
+  "total_private_repos": 19,
+  "owned_private_repos": 0,
+  "disk_usage": 33700,
+  "collaborators": 0,
+  "two_factor_authentication": true,
+  "plan": {
+    "name": "free",
+    "space": 976562499,
+    "collaborators": 0,
+    "private_repos": 10000
+  }
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/orgs_hub4j-test-org-2.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/orgs_hub4j-test-org-2.json
new file mode 100644
index 0000000000..9e3c850788
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/orgs_hub4j-test-org-2.json
@@ -0,0 +1,46 @@
+{
+  "id": "3ce2389d-d142-4c45-ab97-eab643694244",
+  "name": "orgs_hub4j-test-org",
+  "request": {
+    "url": "/orgs/hub4j-test-org",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "orgs_hub4j-test-org-2.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:43 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"8d03272a59bcf3983cb9122b62f919c03829bc402e1306b087a70015b94507ea\"",
+      "Last-Modified": "Thu, 04 Jun 2020 05:56:10 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "admin:org, read:org, repo, user, write:org",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4899",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "101",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:543706:59CCFD:604C19FB"
+    }
+  },
+  "uuid": "3ce2389d-d142-4c45-ab97-eab643694244",
+  "persistent": true,
+  "insertionIndex": 2
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-10.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-10.json
new file mode 100644
index 0000000000..5ebd2ad660
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-10.json
@@ -0,0 +1,48 @@
+{
+  "id": "5bea3e49-2268-4236-97d1-ea173040d7db",
+  "name": "repos_hub4j-test-org_github-api",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api-10.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:45 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"5b5c2af161f09bfe2b6c58170c7a5733df09789eac630b72b07c03226599bbed\"",
+      "Last-Modified": "Fri, 22 Jan 2021 03:50:37 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "repo",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4891",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "109",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:54387B:59CE8B:604C19FD"
+    }
+  },
+  "uuid": "5bea3e49-2268-4236-97d1-ea173040d7db",
+  "persistent": true,
+  "scenarioName": "scenario-1-repos-hub4j-test-org-github-api",
+  "requiredScenarioState": "scenario-1-repos-hub4j-test-org-github-api-3",
+  "insertionIndex": 10
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-3.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-3.json
new file mode 100644
index 0000000000..d91059843a
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-3.json
@@ -0,0 +1,49 @@
+{
+  "id": "4435a524-4fd7-4d46-948b-389a3dfe22c8",
+  "name": "repos_hub4j-test-org_github-api",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api-3.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:43 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"d8b9096c0e44548392bf42177ea1535043ca8d4aa4ba05401299d3219da7fd49\"",
+      "Last-Modified": "Fri, 22 Jan 2021 03:50:37 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "repo",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4898",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "102",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:54371C:59CD11:604C19FB"
+    }
+  },
+  "uuid": "4435a524-4fd7-4d46-948b-389a3dfe22c8",
+  "persistent": true,
+  "scenarioName": "scenario-1-repos-hub4j-test-org-github-api",
+  "requiredScenarioState": "Started",
+  "newScenarioState": "scenario-1-repos-hub4j-test-org-github-api-2",
+  "insertionIndex": 3
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-6.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-6.json
new file mode 100644
index 0000000000..f544cfc37e
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api-6.json
@@ -0,0 +1,49 @@
+{
+  "id": "82b829dd-2632-4d74-b721-46352ee24e11",
+  "name": "repos_hub4j-test-org_github-api",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api-6.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:44 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"5b5c2af161f09bfe2b6c58170c7a5733df09789eac630b72b07c03226599bbed\"",
+      "Last-Modified": "Fri, 22 Jan 2021 03:50:37 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "repo",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4895",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "105",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:5437DF:59CDE4:604C19FC"
+    }
+  },
+  "uuid": "82b829dd-2632-4d74-b721-46352ee24e11",
+  "persistent": true,
+  "scenarioName": "scenario-1-repos-hub4j-test-org-github-api",
+  "requiredScenarioState": "scenario-1-repos-hub4j-test-org-github-api-2",
+  "newScenarioState": "scenario-1-repos-hub4j-test-org-github-api-3",
+  "insertionIndex": 6
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425-5.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425-5.json
new file mode 100644
index 0000000000..e4d2d16ec9
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425-5.json
@@ -0,0 +1,52 @@
+{
+  "id": "a9ff34df-2cb5-4986-9669-7c2c8c914a88",
+  "name": "repos_hub4j-test-org_github-api_issues_425",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/425",
+    "method": "PATCH",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"labels\":[\"removeLabels_label_name_1\",\"removeLabels_label_name_2\",\"removeLabels_label_name_3\"]}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_issues_425-5.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:44 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"eeaa05be2d256a89cfda9686c0e354cb6b400ebce40c9be564a3945055f1c806\"",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4896",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "104",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:543794:59CD96:604C19FC"
+    }
+  },
+  "uuid": "a9ff34df-2cb5-4986-9669-7c2c8c914a88",
+  "persistent": true,
+  "insertionIndex": 5
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_2-8.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_2-8.json
new file mode 100644
index 0000000000..3dd323f77c
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_2-8.json
@@ -0,0 +1,45 @@
+{
+  "id": "a74f2000-0338-43ea-8ceb-0a02e3843fea",
+  "name": "repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_2",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/425/labels/removeLabels_label_name_2",
+    "method": "DELETE",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_2-8.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:45 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"6c3013b8a1b13185049ef20643388988dd1aaf2d2afe2dbb46d74d63ee1288b3\"",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4893",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "107",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:543823:59CE2B:604C19FD"
+    }
+  },
+  "uuid": "a74f2000-0338-43ea-8ceb-0a02e3843fea",
+  "persistent": true,
+  "insertionIndex": 8
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-12.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-12.json
new file mode 100644
index 0000000000..35a02652dc
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-12.json
@@ -0,0 +1,43 @@
+{
+  "id": "f77bce1f-1a8c-415d-a3a5-d0002f6ad610",
+  "name": "repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/425/labels/removeLabels_label_name_3",
+    "method": "DELETE",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 404,
+    "body": "{\"message\":\"Label does not exist\",\"documentation_url\":\"https://docs.github.com/rest/reference/issues#remove-a-label-from-an-issue\"}",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:46 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4889",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "111",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "Vary": "Accept-Encoding, Accept, X-Requested-With",
+      "X-GitHub-Request-Id": "C5EC:7528:5438C3:59CEDB:604C19FE"
+    }
+  },
+  "uuid": "f77bce1f-1a8c-415d-a3a5-d0002f6ad610",
+  "persistent": true,
+  "scenarioName": "scenario-3-repos-hub4j-test-org-github-api-issues-425-labels-removeLabels_label_name_3",
+  "requiredScenarioState": "scenario-3-repos-hub4j-test-org-github-api-issues-425-labels-removeLabels_label_name_3-2",
+  "newScenarioState": "scenario-3-repos-hub4j-test-org-github-api-issues-425-labels-removeLabels_label_name_3-3",
+  "insertionIndex": 12
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-13.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-13.json
new file mode 100644
index 0000000000..53b581a7ea
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-13.json
@@ -0,0 +1,42 @@
+{
+  "id": "1a450956-c535-4b7b-b1a5-db01c05b21fc",
+  "name": "repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/425/labels/removeLabels_label_name_3",
+    "method": "DELETE",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 404,
+    "body": "{\"message\":\"Label does not exist\",\"documentation_url\":\"https://docs.github.com/rest/reference/issues#remove-a-label-from-an-issue\"}",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:46 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4888",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "112",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "Vary": "Accept-Encoding, Accept, X-Requested-With",
+      "X-GitHub-Request-Id": "C5EC:7528:5438D7:59CEEF:604C19FE"
+    }
+  },
+  "uuid": "1a450956-c535-4b7b-b1a5-db01c05b21fc",
+  "persistent": true,
+  "scenarioName": "scenario-3-repos-hub4j-test-org-github-api-issues-425-labels-removeLabels_label_name_3",
+  "requiredScenarioState": "scenario-3-repos-hub4j-test-org-github-api-issues-425-labels-removeLabels_label_name_3-3",
+  "insertionIndex": 13
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-9.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-9.json
new file mode 100644
index 0000000000..8ee85b7bae
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3-9.json
@@ -0,0 +1,48 @@
+{
+  "id": "012ac6d2-86f8-44ca-8b90-0da759aff1e3",
+  "name": "repos_hub4j-test-org_github-api_issues_425_labels_removelabels_label_name_3",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/issues/425/labels/removeLabels_label_name_3",
+    "method": "DELETE",
+    "headers": {
+      "Accept": {
+        "equalTo": "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "body": "[{\"id\":2806271705,\"node_id\":\"MDU6TGFiZWwyODA2MjcxNzA1\",\"url\":\"https://api.github.com/repos/hub4j-test-org/github-api/labels/removeLabels_label_name_1\",\"name\":\"removeLabels_label_name_1\",\"color\":\"ededed\",\"default\":false,\"description\":null}]",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:45 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"8d1cf7481d1cefda84f98b72dd1c61789d18328e0f371000c4bd4f40b432e3d9\"",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "unknown, github.v3",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4892",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "108",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:543852:59CE5E:604C19FD"
+    }
+  },
+  "uuid": "012ac6d2-86f8-44ca-8b90-0da759aff1e3",
+  "persistent": true,
+  "scenarioName": "scenario-3-repos-hub4j-test-org-github-api-issues-425-labels-removeLabels_label_name_3",
+  "requiredScenarioState": "Started",
+  "newScenarioState": "scenario-3-repos-hub4j-test-org-github-api-issues-425-labels-removeLabels_label_name_3-2",
+  "insertionIndex": 9
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls-4.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls-4.json
new file mode 100644
index 0000000000..7d4dbe07de
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls-4.json
@@ -0,0 +1,53 @@
+{
+  "id": "8dc10c85-a109-4d62-8868-0c5381feeafe",
+  "name": "repos_hub4j-test-org_github-api_pulls",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/pulls",
+    "method": "POST",
+    "headers": {
+      "Accept": {
+        "equalTo": "application/vnd.github.shadow-cat-preview+json"
+      }
+    },
+    "bodyPatterns": [
+      {
+        "equalToJson": "{\"head\":\"test/stable\",\"draft\":false,\"maintainer_can_modify\":true,\"title\":\"removeLabels\",\"body\":\"## test\",\"base\":\"master\"}",
+        "ignoreArrayOrder": true,
+        "ignoreExtraElements": false
+      }
+    ]
+  },
+  "response": {
+    "status": 201,
+    "bodyFileName": "repos_hub4j-test-org_github-api_pulls-4.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:44 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "\"aa4372631c90c3abb24c153b73d81fbad6d73fd445b9a017f473d83141a31c5c\"",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "github.v3; param=shadow-cat-preview; format=json",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4897",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "103",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:543736:59CD2E:604C19FB",
+      "Location": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/425"
+    }
+  },
+  "uuid": "8dc10c85-a109-4d62-8868-0c5381feeafe",
+  "persistent": true,
+  "insertionIndex": 4
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls_425-11.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls_425-11.json
new file mode 100644
index 0000000000..e65ed868c6
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls_425-11.json
@@ -0,0 +1,48 @@
+{
+  "id": "a6a60436-759e-4c02-b64e-4a05284ede5e",
+  "name": "repos_hub4j-test-org_github-api_pulls_425",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/pulls/425",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "application/vnd.github.shadow-cat-preview+json"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_pulls_425-11.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:46 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"94c0dee8b8e847e586361cd23d0f32c872ee4dc2617e32c68cf932b46c568a39\"",
+      "Last-Modified": "Sat, 13 Mar 2021 01:48:45 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "github.v3; param=shadow-cat-preview; format=json",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4890",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "110",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:543896:59CEA9:604C19FD"
+    }
+  },
+  "uuid": "a6a60436-759e-4c02-b64e-4a05284ede5e",
+  "persistent": true,
+  "scenarioName": "scenario-2-repos-hub4j-test-org-github-api-pulls-425",
+  "requiredScenarioState": "scenario-2-repos-hub4j-test-org-github-api-pulls-425-2",
+  "insertionIndex": 11
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls_425-7.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls_425-7.json
new file mode 100644
index 0000000000..d90263ce19
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/repos_hub4j-test-org_github-api_pulls_425-7.json
@@ -0,0 +1,49 @@
+{
+  "id": "d0dd2a7a-0ba8-4db9-80cb-5d43b1f54325",
+  "name": "repos_hub4j-test-org_github-api_pulls_425",
+  "request": {
+    "url": "/repos/hub4j-test-org/github-api/pulls/425",
+    "method": "GET",
+    "headers": {
+      "Accept": {
+        "equalTo": "application/vnd.github.shadow-cat-preview+json"
+      }
+    }
+  },
+  "response": {
+    "status": 200,
+    "bodyFileName": "repos_hub4j-test-org_github-api_pulls_425-7.json",
+    "headers": {
+      "Server": "GitHub.com",
+      "Date": "Sat, 13 Mar 2021 01:48:44 GMT",
+      "Content-Type": "application/json; charset=utf-8",
+      "Cache-Control": "private, max-age=60, s-maxage=60",
+      "Vary": [
+        "Accept, Authorization, Cookie, X-GitHub-OTP",
+        "Accept-Encoding, Accept, X-Requested-With"
+      ],
+      "ETag": "W/\"d1585315df40d30496a0b4a272609d63c768fbedb70804a7bdbacb63c68f94a8\"",
+      "Last-Modified": "Sat, 13 Mar 2021 01:48:44 GMT",
+      "X-OAuth-Scopes": "admin:org, admin:org_hook, admin:public_key, admin:repo_hook, delete_repo, gist, notifications, repo, user, workflow, write:discussion",
+      "X-Accepted-OAuth-Scopes": "",
+      "X-GitHub-Media-Type": "github.v3; param=shadow-cat-preview; format=json",
+      "X-RateLimit-Limit": "5000",
+      "X-RateLimit-Remaining": "4894",
+      "X-RateLimit-Reset": "1615600351",
+      "X-RateLimit-Used": "106",
+      "Strict-Transport-Security": "max-age=31536000; includeSubdomains; preload",
+      "X-Frame-Options": "deny",
+      "X-Content-Type-Options": "nosniff",
+      "X-XSS-Protection": "1; mode=block",
+      "Referrer-Policy": "origin-when-cross-origin, strict-origin-when-cross-origin",
+      "Content-Security-Policy": "default-src 'none'",
+      "X-GitHub-Request-Id": "C5EC:7528:5437FD:59CE00:604C19FC"
+    }
+  },
+  "uuid": "d0dd2a7a-0ba8-4db9-80cb-5d43b1f54325",
+  "persistent": true,
+  "scenarioName": "scenario-2-repos-hub4j-test-org-github-api-pulls-425",
+  "requiredScenarioState": "Started",
+  "newScenarioState": "scenario-2-repos-hub4j-test-org-github-api-pulls-425-2",
+  "insertionIndex": 7
+}
\ No newline at end of file
diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/user-1.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/user-1.json
new file mode 100644
index 0000000000..f154db2186
--- /dev/null
+++ b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/removeLabels/mappings/user-1.json
@@ -0,0 +1,46 @@
+{
+  "id": "98f3b23c-8b10-486f-83cd-7d1b4c2622ad",
+  "name": "user",
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diff --git a/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/updateOutdatedBranches/__files/user-10.json b/src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/updateOutdatedBranches/__files/user-10.json
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+}
\ No newline at end of file