diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 649a14846..aa40035a0 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -91,6 +91,11 @@ jobs:
       name: nilness
       run: go run golang.org/x/tools/go/analysis/passes/nilness/cmd/nilness@latest ./...
 
+    - if: runner.os == 'Linux'
+      name: Check for superfluous trailing whitespace
+      run: |
+        ! grep -IErn '\s$' --exclude-dir={.git,target,pgdata}
+
     - if: runner.os == 'Linux'
       name: Missing specification object link to definition
       run: |
diff --git a/openapi3/testdata/link-example.yaml b/openapi3/testdata/link-example.yaml
index 5837d705e..735e7dbb7 100644
--- a/openapi3/testdata/link-example.yaml
+++ b/openapi3/testdata/link-example.yaml
@@ -1,23 +1,23 @@
 openapi: 3.0.0
-info: 
+info:
   title: Link Example
   version: 1.0.0
-paths: 
-  /2.0/users/{username}: 
-    get: 
+paths:
+  /2.0/users/{username}:
+    get:
       operationId: getUserByName
-      parameters: 
+      parameters:
       - name: username
         in: path
         required: true
         schema:
           type: string
-      responses: 
+      responses:
         '200':
           description: The User
           content:
             application/json:
-              schema: 
+              schema:
                 $ref: '#/components/schemas/user'
           links:
             userRepositories:
@@ -34,7 +34,7 @@ paths:
       responses:
         '200':
           description: repositories owned by the supplied user
-          content: 
+          content:
             application/json:
               schema:
                 type: array
@@ -43,10 +43,10 @@ paths:
           links:
             userRepository:
               $ref: '#/components/links/UserRepository'
-  /2.0/repositories/{username}/{slug}: 
-    get: 
+  /2.0/repositories/{username}/{slug}:
+    get:
       operationId: getRepository
-      parameters: 
+      parameters:
         - name: username
           in: path
           required: true
@@ -57,20 +57,20 @@ paths:
           required: true
           schema:
             type: string
-      responses: 
+      responses:
         '200':
           description: The repository
           content:
-              application/json: 
-                schema: 
+              application/json:
+                schema:
                   $ref: '#/components/schemas/repository'
           links:
             repositoryPullRequests:
               $ref: '#/components/links/RepositoryPullRequests'
-  /2.0/repositories/{username}/{slug}/pullrequests: 
-    get: 
+  /2.0/repositories/{username}/{slug}/pullrequests:
+    get:
       operationId: getPullRequestsByRepository
-      parameters: 
+      parameters:
       - name: username
         in: path
         required: true
@@ -85,23 +85,23 @@ paths:
         in: query
         schema:
           type: string
-          enum: 
+          enum:
             - open
             - merged
             - declined
-      responses: 
+      responses:
         '200':
           description: an array of pull request objects
           content:
-            application/json: 
-              schema: 
+            application/json:
+              schema:
                 type: array
-                items: 
+                items:
                   $ref: '#/components/schemas/pullrequest'
-  /2.0/repositories/{username}/{slug}/pullrequests/{pid}: 
-    get: 
+  /2.0/repositories/{username}/{slug}/pullrequests/{pid}:
+    get:
       operationId: getPullRequestsById
-      parameters: 
+      parameters:
       - name: username
         in: path
         required: true
@@ -117,20 +117,20 @@ paths:
         required: true
         schema:
           type: string
-      responses: 
+      responses:
         '200':
           description: a pull request object
           content:
-            application/json: 
-              schema: 
+            application/json:
+              schema:
                 $ref: '#/components/schemas/pullrequest'
           links:
             pullRequestMerge:
               $ref: '#/components/links/PullRequestMerge'
-  /2.0/repositories/{username}/{slug}/pullrequests/{pid}/merge: 
-    post: 
+  /2.0/repositories/{username}/{slug}/pullrequests/{pid}/merge:
+    post:
       operationId: mergePullRequest
-      parameters: 
+      parameters:
       - name: username
         in: path
         required: true
@@ -146,7 +146,7 @@ paths:
         required: true
         schema:
           type: string
-      responses: 
+      responses:
         '204':
           description: the PR was successfully merged
 components:
@@ -165,7 +165,7 @@ components:
     RepositoryPullRequests:
       # returns '#/components/schemas/pullrequest'
       operationId: getPullRequestsByRepository
-      parameters: 
+      parameters:
           username: $response.body#/owner/username
           slug: $response.body#/slug
     PullRequestMerge:
@@ -175,29 +175,29 @@ components:
         username: $response.body#/author/username
         slug: $response.body#/repository/slug
         pid: $response.body#/id
-  schemas: 
-    user: 
+  schemas:
+    user:
       type: object
-      properties: 
-        username: 
+      properties:
+        username:
           type: string
-        uuid: 
+        uuid:
           type: string
-    repository: 
+    repository:
       type: object
-      properties: 
-        slug: 
+      properties:
+        slug:
           type: string
-        owner: 
+        owner:
           $ref: '#/components/schemas/user'
-    pullrequest: 
+    pullrequest:
       type: object
-      properties: 
-        id: 
+      properties:
+        id:
           type: integer
-        title: 
+        title:
           type: string
-        repository: 
+        repository:
           $ref: '#/components/schemas/repository'
-        author: 
+        author:
           $ref: '#/components/schemas/user'
diff --git a/openapi3/testdata/lxkns.yaml b/openapi3/testdata/lxkns.yaml
index e8400592c..6e1bee5d6 100644
--- a/openapi3/testdata/lxkns.yaml
+++ b/openapi3/testdata/lxkns.yaml
@@ -1,6 +1,6 @@
 # https://raw.githubusercontent.com/thediveo/lxkns/71e8fb5e40c612ecc89d972d211221137e92d5f0/api/openapi-spec/lxkns.yaml
 openapi: 3.0.2
-security: 
+security:
     -  {}
 info:
     title: lxkns
diff --git a/openapi3filter/testdata/petstore.yaml b/openapi3filter/testdata/petstore.yaml
index 4a554488e..026c37e27 100644
--- a/openapi3filter/testdata/petstore.yaml
+++ b/openapi3filter/testdata/petstore.yaml
@@ -38,7 +38,7 @@ paths:
           minimum: 1
       requestBody:
         required: true
-        content: 
+        content:
           'application/json':
             schema:
               $ref: '#/components/schemas/Pet'