diff --git a/tests/flate2/test_gzip.py b/tests/flate2/test_gzip.py
index f18784c2..4deeaae3 100644
--- a/tests/flate2/test_gzip.py
+++ b/tests/flate2/test_gzip.py
@@ -103,3 +103,4 @@ def test_gzip_quality_value_error() -> None:
     with pytest.raises(ValueError) as e:
         ry.gzip(b"test", quality=10)
     s = str(e.value)
+    assert "Quality must be between 0 and 9 - got: 10" in s