Add print to confirm that the failed_test_stories.yml has been saved

rasa/cli/test.py

@@ -17,6 +17,7 @@
 )
 import rasa.shared.utils.validation as validation_utils
 import rasa.cli.utils
+from rasa.shared.utils.cli import print_info
 
 logger = logging.getLogger(__name__)
 
@@ -101,6 +102,7 @@ def run_core_test(args: argparse.Namespace) -> None:
     else:
         test_core_models(args.model, stories, output)
 
+    print_info("Failed stories written to " + output + "/failed_test_stories.yml")
 
 def run_nlu_test(args: argparse.Namespace) -> None:
     """Run NLU tests."""