diff --git a/addons/storyshots/README.md b/addons/storyshots/README.md
index 6416a4f4bb5..2e8d6c4338b 100644
--- a/addons/storyshots/README.md
+++ b/addons/storyshots/README.md
@@ -152,3 +152,7 @@ Like `snapshotWithOptions`, but generate a separate snapshot file for each stori
 ### `shallowSnapshot`
 
 Take a snapshot of a shallow-rendered version of the component.
+
+### `getSnapshotFileName`
+
+Utility function used in `multiSnapshotWithOptions`. This is made available for users who implement custom test functions that also want to take advantage of multi-file storyshots.