diff --git a/testing/web-platform/tests/cookie-store/cookieStoreManager_getSubscriptions_multiple.tentative.https.any.js b/testing/web-platform/tests/cookie-store/cookieStoreManager_getSubscriptions_multiple.tentative.https.any.js
index d8c233e2e5f5e..89b90d91e2ed2 100644
--- a/testing/web-platform/tests/cookie-store/cookieStoreManager_getSubscriptions_multiple.tentative.https.any.js
+++ b/testing/web-platform/tests/cookie-store/cookieStoreManager_getSubscriptions_multiple.tentative.https.any.js
@@ -355,6 +355,38 @@ add_cleanup
 )
 =
 >
+{
+/
+/
+For
+non
+-
+ServiceWorker
+environments
+registration
+.
+unregister
+(
+)
+cleans
+up
+/
+/
+cookie
+subscriptions
+.
+if
+(
+self
+.
+GLOBAL
+.
+isWorker
+(
+)
+)
+{
+return
 registration
 .
 cookies
@@ -363,6 +395,9 @@ unsubscribe
 (
 subscriptions
 )
+;
+}
+}
 )
 ;
 }
@@ -419,6 +454,38 @@ add_cleanup
 )
 =
 >
+{
+/
+/
+For
+non
+-
+ServiceWorker
+environments
+registration
+.
+unregister
+(
+)
+cleans
+up
+/
+/
+cookie
+subscriptions
+.
+if
+(
+self
+.
+GLOBAL
+.
+isWorker
+(
+)
+)
+{
+return
 registration
 .
 cookies
@@ -427,6 +494,9 @@ unsubscribe
 (
 subscriptions
 )
+;
+}
+}
 )
 ;
 }