old_contents: import unittest
  
  import websockets
  import websockets.client
  import websockets.exceptions
  import websockets.legacy.auth
  import websockets.legacy.client
  import websockets.legacy.protocol
  import websockets.legacy.server
  import websockets.server
  import websockets.typing
  import websockets.uri
  
  
  combined_exports = (
      websockets.legacy.auth.__all__
      + websockets.legacy.client.__all__
      + websockets.legacy.protocol.__all__
      + websockets.legacy.server.__all__
      + websockets.client.__all__
      + websockets.exceptions.__all__
      + websockets.server.__all__
      + websockets.typing.__all__
      + websockets.uri.__all__
  )
  
  
  class TestExportsAllSubmodules(unittest.TestCase):
      def test_top_level_module_reexports_all_submodule_exports(self):
          self.assertEqual(set(combined_exports), set(websockets.__all__))
  
      def test_submodule_exports_are_globally_unique(self):
          self.assertEqual(len(set(combined_exports)), len(combined_exports))
  
new_contents: import unittest
  
  import websockets
  import websockets.client
  import websockets.exceptions
  import websockets.legacy.auth
  import websockets.legacy.client
  import websockets.legacy.protocol
  import websockets.legacy.server
  import websockets.server
  import websockets.typing
  import websockets.uri
  
  
  combined_exports = (
      websockets.legacy.auth.__all__
      + websockets.legacy.client.__all__
      + websockets.legacy.protocol.__all__
      + websockets.legacy.server.__all__
      + websockets.client.__all__
      + websockets.exceptions.__all__
      + websockets.server.__all__
      + websockets.typing.__all__
      + websockets.uri.__all__
  )
  
  
  class ExportsTests(unittest.TestCase):
      def test_top_level_module_reexports_all_submodule_exports(self):
          self.assertEqual(set(combined_exports), set(websockets.__all__))
  
      def test_submodule_exports_are_globally_unique(self):
          self.assertEqual(len(set(combined_exports)), len(combined_exports))
  
subject: Rename test class consistently with others.