diff --git a/scripts/visual-diff-capture.ts b/scripts/visual-diff-capture.ts
index 75c0127c1d..a0341705b8 100644
--- a/scripts/visual-diff-capture.ts
+++ b/scripts/visual-diff-capture.ts
@@ -159,7 +159,7 @@ class BrowserAuto {
       'visit: %s, onlyViewport: %s, openTriggerClassName: %s',
       pageUrl,
       onlyViewport,
-      options.openTriggerClassName,
+      options.openTriggerClassName || false,
     );
     if (!onlyViewport) {
       // Get scroll height of the rendered page and set viewport