diff --git a/tests/unit/test_regressions.py b/tests/unit/test_regressions.py
index 10bd3bf81..89fa09274 100644
--- a/tests/unit/test_regressions.py
+++ b/tests/unit/test_regressions.py
@@ -1493,19 +1493,25 @@ def test_isort_adding_second_comma_issue_1621():
     """
     assert isort.check_code(
         """from .test import (
-    TestTestTestTestTestTest2 as TestTestTestTestTestTest1,  # Some really long comment bla bla bla bla bla
+    TestTestTestTestTestTest2 as TestTestTestTestTestTest1,  """
+        """# Some really long comment bla bla bla bla bla
 )
 """,
         profile="black",
         show_diff=True,
     )
-    assert isort.code(
-        """from .test import (
-    TestTestTestTestTestTest2 as TestTestTestTestTestTest1  # Some really long comment bla bla bla bla bla
+    assert (
+        isort.code(
+            """from .test import (
+    TestTestTestTestTestTest2 as TestTestTestTestTestTest1  """
+            """# Some really long comment bla bla bla bla bla
 )
 """,
-        profile="black",
-    ) == """from .test import (
-    TestTestTestTestTestTest2 as TestTestTestTestTestTest1,  # Some really long comment bla bla bla bla bla
+            profile="black",
+        )
+        == """from .test import (
+    TestTestTestTestTestTest2 as TestTestTestTestTestTest1,  """
+        """# Some really long comment bla bla bla bla bla
 )
 """
+    )