diff --git a/tests/test_train.py b/tests/test_train.py
index 7c4bc48..a03cf6e 100644
--- a/tests/test_train.py
+++ b/tests/test_train.py
@@ -101,6 +101,7 @@ def test_train():
             '-p', 'useless_config.json',
             '-d', path
         ])
+        raise IOError(result.stdout)
         assert result.exit_code == 0
         # assert that model checkpoint was created.
         assert os.path.exists(join(path, 'model', 'model.ckpt-10.index'))