Verify that it worked before

pyfakefs/fake_filesystem_unittest.py

@@ -1094,12 +1094,12 @@ def cleanup(self) -> None:
         # Reload all modules loaded and patched during the test, ensuring that
         # no faked modules are referenced after the test.
         for name in self._loaded_module_names:
-            # if name in sys.modules and name not in reloaded_module_names:
-            if name not in reloaded_module_names:
+            if name in sys.modules and name not in reloaded_module_names:
                 # in the unlikely case that the cache is turned off,
                 # we have to reload all modules
                 if not self._patcher.use_cache or name in Patcher.CACHED_MODULES:
-                    reload(sys.modules[name])
+                    # reload(sys.modules[name])
+                    del sys.modules[name]
 
     def needs_patch(self, name: str) -> bool:
         """Check if the module with the given name shall be replaced."""