Update test_progress_bar.py

Author: justusschock

tests/callbacks/test_progress_bar.py

@@ -485,9 +485,11 @@ def test_progress_bar_print_disabled(tqdm_write, mock_print, tmpdir):
 
 def test_progbar_pickle():
     bar = ProgressBar()
-    trainer = Trainer(fast_dev_run=True, callbacks=[bar, limit_train_batches=1,
-        limit_val_batches=1,
-        limit_test_batches=1, max_steps=1)
+    trainer = Trainer(fast_dev_run=True, callbacks=[bar], 
+                      limit_train_batches=1,
+                      limit_val_batches=1,
+                      limit_test_batches=1, 
+                      max_steps=1)
     model = BoringModel()
     pickle.dumps(bar)
     trainer.fit(model)