diff --git a/.travis.yml b/.travis.yml
index 36f2961d2..b631f21d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,7 +23,7 @@ jobs:
       dist: bionic
       python: 3.7
       script:
-        - pip3 install black
+        - pip3 install -U --pre black
         - black --check .
     - stage: test
       name: cli_func_v4
diff --git a/gitlab/__init__.py b/gitlab/__init__.py
index 883bb445f..3605b80b3 100644
--- a/gitlab/__init__.py
+++ b/gitlab/__init__.py
@@ -630,7 +630,7 @@ def http_list(self, path, query_data=None, as_list=None, **kwargs):
         get_all = kwargs.pop("all", False)
         url = self._build_url(path)
 
-        if get_all is True:
+        if get_all is True and as_list is True:
             return list(GitlabList(self, url, query_data, **kwargs))
 
         if "page" in kwargs or as_list is True:
diff --git a/gitlab/tests/test_gitlab.py b/gitlab/tests/test_gitlab.py
index f9d4cc82e..7449b3a66 100644
--- a/gitlab/tests/test_gitlab.py
+++ b/gitlab/tests/test_gitlab.py
@@ -119,6 +119,24 @@ def resp_2(url, request):
                 self.assertEqual(l[0]["a"], "b")
                 self.assertEqual(l[1]["c"], "d")
 
+    def test_all_omitted_when_as_list(self):
+        @urlmatch(scheme="http", netloc="localhost", path="/api/v4/tests", method="get")
+        def resp(url, request):
+            headers = {
+                "content-type": "application/json",
+                "X-Page": 2,
+                "X-Next-Page": 2,
+                "X-Per-Page": 1,
+                "X-Total-Pages": 2,
+                "X-Total": 2,
+            }
+            content = '[{"c": "d"}]'
+            return response(200, content, headers, None, 5, request)
+
+        with HTTMock(resp):
+            result = self.gl.http_list("/tests", as_list=False, all=True)
+            self.assertIsInstance(result, GitlabList)
+
 
 class TestGitlabHttpMethods(unittest.TestCase):
     def setUp(self):
diff --git a/gitlab/v4/objects.py b/gitlab/v4/objects.py
index 5125ff47f..89e3259b0 100644
--- a/gitlab/v4/objects.py
+++ b/gitlab/v4/objects.py
@@ -762,8 +762,8 @@ class GroupClusterManager(CRUDMixin, RESTManager):
     _obj_cls = GroupCluster
     _from_parent_attrs = {"group_id": "id"}
     _create_attrs = (
-        ("name", "platform_kubernetes_attributes",),
-        ("domain", "enabled", "managed", "environment_scope",),
+        ("name", "platform_kubernetes_attributes"),
+        ("domain", "enabled", "managed", "environment_scope"),
     )
     _update_attrs = (
         tuple(),
@@ -1664,8 +1664,8 @@ class ProjectClusterManager(CRUDMixin, RESTManager):
     _obj_cls = ProjectCluster
     _from_parent_attrs = {"project_id": "id"}
     _create_attrs = (
-        ("name", "platform_kubernetes_attributes",),
-        ("domain", "enabled", "managed", "environment_scope",),
+        ("name", "platform_kubernetes_attributes"),
+        ("domain", "enabled", "managed", "environment_scope"),
     )
     _update_attrs = (
         tuple(),