diff --git a/zerver/tests/test_slack_importer.py b/zerver/tests/test_slack_importer.py
index a056bc1dce..fa85c051f1 100644
--- a/zerver/tests/test_slack_importer.py
+++ b/zerver/tests/test_slack_importer.py
@@ -63,16 +63,16 @@ def remove_folder(path: str) -> None:
     if os.path.exists(path):
         shutil.rmtree(path)
 
+class MockResponse:
+    def __init__(self, json_data: Dict[str, Any], status_code: int) -> None:
+        self.json_data = json_data
+        self.status_code = status_code
+
+    def json(self) -> Dict[str, Any]:
+        return self.json_data
+
 # This method will be used by the mock to replace requests.get
-def mocked_requests_get(*args: List[str], **kwargs: List[str]) -> mock.Mock:
-    class MockResponse:
-        def __init__(self, json_data: Dict[str, Any], status_code: int) -> None:
-            self.json_data = json_data
-            self.status_code = status_code
-
-        def json(self) -> Dict[str, Any]:
-            return self.json_data
-
+def mocked_requests_get(*args: List[str], **kwargs: List[str]) -> MockResponse:
     if args[0] == 'https://slack.com/api/users.list?token=xoxp-valid-token':
         return MockResponse({"ok": True, "members": "user_data"}, 200)
     elif args[0] == 'https://slack.com/api/users.list?token=xoxp-invalid-token':