diff --git a/tests/objects/test_label_structure.py b/tests/objects/test_label_structure.py
index f2b37e07..1a823d68 100644
--- a/tests/objects/test_label_structure.py
+++ b/tests/objects/test_label_structure.py
@@ -1134,7 +1134,7 @@ def test_audio_classification_exceed_max_frames(ontology, empty_audio_label_row:
     with pytest.raises(LabelRowError) as e:
         classification_instance.set_for_frames(frames=5000)
 
-    assert e.value.message == 'The supplied frame of `5000` is not within the acceptable bounds of `0` to `1`.'
+    assert e.value.message == "The supplied frame of `5000` is not within the acceptable bounds of `0` to `1`."
 
     range_list = classification_instance.range_list
     assert len(range_list) == 1