diff --git a/tests/unit/test_snap.py b/tests/unit/test_snap.py
index ef5a6f03..94875a1c 100644
--- a/tests/unit/test_snap.py
+++ b/tests/unit/test_snap.py
@@ -558,7 +558,7 @@ def test_revision_doesnt_refresh(self, mock_check_output):
         )
 
         mock_check_output.reset_mock()
-        # ensure that calling refresh with the same revision doesn't subprocess out
+        # Ensure that calling refresh with the same revision doesn't subprocess out.
         snap.ensure("curl", "latest", classic=True, revision="233", cohort="+")
         mock_check_output.assert_not_called()