diff --git a/zerver/tests/test_gitter_importer.py b/zerver/tests/test_gitter_importer.py
index 8233f87e80..061e46eea2 100644
--- a/zerver/tests/test_gitter_importer.py
+++ b/zerver/tests/test_gitter_importer.py
@@ -107,7 +107,7 @@ class GitterImporter(ZulipTestCase):
             messages["zerver_usermessage"], "user_profile"
         )
         self.assertEqual(
-            set([user_should_not_be_long_term_idle["id"]]), exported_usermessage_userprofile
+            {user_should_not_be_long_term_idle["id"]}, exported_usermessage_userprofile
         )
         exported_usermessage_message = self.get_set(messages["zerver_usermessage"], "message")
         self.assertEqual(exported_usermessage_message, exported_messages_id)
diff --git a/zerver/tests/test_import_export.py b/zerver/tests/test_import_export.py
index 61ac2eb6ed..14274c33d0 100644
--- a/zerver/tests/test_import_export.py
+++ b/zerver/tests/test_import_export.py
@@ -678,13 +678,13 @@ class RealmImportExportTest(ExportFile):
             .values_list("id", flat=True)
         )
 
-        exported_msg_ids = (
-            set(public_stream_message_ids)
-            | set(private_stream_message_ids)
-            | set([stream_b_second_message_id])
-            | set(exported_pm_ids)
-            | set(exported_huddle_ids)
-        )
+        exported_msg_ids = {
+            *public_stream_message_ids,
+            *private_stream_message_ids,
+            stream_b_second_message_id,
+            *exported_pm_ids,
+            *exported_huddle_ids,
+        }
         self.assertEqual(self.get_set(data["zerver_message"], "id"), exported_msg_ids)
 
         self.assertNotIn(stream_b_first_message_id, exported_msg_ids)