diff --git a/tests/app/aws/test_s3.py b/tests/app/aws/test_s3.py
index 4e5e8a847..e15f9541b 100644
--- a/tests/app/aws/test_s3.py
+++ b/tests/app/aws/test_s3.py
@@ -612,7 +612,7 @@ def test_get_s3_client_default_credentials():
             assert client is not None
             assert mock_session.called
             assert mock_session.return_value.client.called
-            mock_session.return_value_client.assert_called_once_with(
+            mock_session.return_value.client.assert_called_once_with(
                 "s3",
                 aws_access_id=None,
                 aws_secret_access_key=None,  # pragma: allowlist secret