diff --git a/src/highlight/src/extension.ts b/src/highlight/src/extension.ts
index a5723e6c2..2bec219e2 100755
--- a/src/highlight/src/extension.ts
+++ b/src/highlight/src/extension.ts
@@ -416,6 +416,7 @@ function updateRainbowBrackets() {
     }
   }
   activeEditor.setDecorations(misplacedType, misplaced);
+  mirrorDoc["highlightFoundMisplacedBrackets"] = misplaced.length; // help tests 'see' that misplaced brackets are highlighted
   activeEditor.setDecorations(commentFormType, comment_forms);
   activeEditor.setDecorations(ignoredFormType, ignores);
   activeEditor.setDecorations(ignoredTopLevelFormType, topLevelIgnores);