[Deepspeed] zero3 tests band aid (huggingface#11235)

* temp band-aid

* style

tests/deepspeed/test_deepspeed.py

@@ -115,6 +115,12 @@ def setUp(self):
         with io.open(self.ds_config_file[ZERO3], "r", encoding="utf-8") as f:
             self.ds_config_dict[ZERO3] = json.load(f)
 
+    def tearDown(self):
+        # XXX: Fixme - this is a temporary band-aid since this global variable impacts other tests
+        import transformers
+
+        transformers.integrations._is_deepspeed_zero3_enabled = None
+
     def get_config_dict(self, stage):
         """ As the tests modify the dict, always make a copy """
         config = deepcopy(self.ds_config_dict[stage])