diff --git a/source/client-side-encryption/tests/legacy/keyCache.yml b/source/client-side-encryption/tests/legacy/keyCache.yml
index 41ce81fbfe..ea3ebdc578 100644
--- a/source/client-side-encryption/tests/legacy/keyCache.yml
+++ b/source/client-side-encryption/tests/legacy/keyCache.yml
@@ -54,6 +54,7 @@ tests:
             find: *collection_name
             filter: { _id: 1 }
           command_name: find
+      # The cache has expired and the key must be fetched again
       - command_started_event:
           command:
             find: datakeys