diff --git a/testing/web-platform/tests/dom/observable/tentative/observable-constructor.any.js b/testing/web-platform/tests/dom/observable/tentative/observable-constructor.any.js
index 73bf946872ea..ced820fb244e 100644
--- a/testing/web-platform/tests/dom/observable/tentative/observable-constructor.any.js
+++ b/testing/web-platform/tests/dom/observable/tentative/observable-constructor.any.js
@@ -1165,6 +1165,8 @@ source
 subscribe
 (
 {
+}
+{
 signal
 :
 AbortSignal
@@ -1255,6 +1257,8 @@ source
 subscribe
 (
 {
+}
+{
 signal
 :
 controller
@@ -3791,6 +3795,8 @@ complete
 )
 '
 )
+}
+{
 signal
 :
 ac
@@ -4058,6 +4064,8 @@ push
 complete
 '
 )
+}
+{
 signal
 :
 ac
@@ -4534,6 +4542,8 @@ source
 subscribe
 (
 {
+}
+{
 signal
 :
 ac
@@ -5487,6 +5497,8 @@ push
 complete
 '
 )
+}
+{
 signal
 :
 ac