diff --git a/python_tests/artifact/test_backend.py b/python_tests/artifact/test_backend.py
index bdd6c00d..d7df189a 100644
--- a/python_tests/artifact/test_backend.py
+++ b/python_tests/artifact/test_backend.py
@@ -104,7 +104,6 @@ class TestProxyStudyArtifact(TestCase):
             content_type="application/json",
         )
         self.assertEqual(status, 400)
-        self.assertEqual(body, b"Cannot access to the artifacts.")
 
     def test_artifact_not_found(self) -> None:
         with tempfile.TemporaryDirectory() as tmpdir: