diff --git a/test/built-ins/RegExp/match-indices/indices-groups-object.js b/test/built-ins/RegExp/match-indices/indices-groups-object.js
index 80c16c8b41..e40412daf7 100644
--- a/test/built-ins/RegExp/match-indices/indices-groups-object.js
+++ b/test/built-ins/RegExp/match-indices/indices-groups-object.js
@@ -3,7 +3,7 @@
 
 /*---
 description: The groups object of indices is created with CreateDataProperty
-includes: [compareArray.js]
+includes: [propertyHelper.js, compareArray.js]
 esid: sec-makeindicesarray
 features: [regexp-named-groups, regexp-match-indices]
 info: |
@@ -15,6 +15,23 @@ info: |
     10. Perform ! CreateDataProperty(_A_, `"groups"`, _groups_).
 ---*/
 
+// `groups` is created with Define, not Set.
+let counter = 0;
+Object.defineProperty(Array.prototype, "groups", {
+  set() { counter++; }
+});
+
+let indices = /(?<x>.)/.exec("a").indices;
+assert.sameValue(counter, 0);
+
+// `groups` is writable, enumerable and configurable
+// (from CreateDataProperty).
+verifyProperty(indices, 'groups', {
+    writable: true,
+    enumerable: true,
+    configurable: true
+});
+
 // The `__proto__` property on the groups object is not special,
 // and does not affect the [[Prototype]] of the resulting groups object.
 let {groups} = /(?<__proto__>.)/.exec("a").indices;
diff --git a/test/built-ins/RegExp/named-groups/groups-object.js b/test/built-ins/RegExp/named-groups/groups-object.js
index 80eb0cd27f..32a85bf759 100644
--- a/test/built-ins/RegExp/named-groups/groups-object.js
+++ b/test/built-ins/RegExp/named-groups/groups-object.js
@@ -3,6 +3,7 @@
 
 /*---
 description: Properties of the groups object are created with CreateDataProperty
+includes: [propertyHelper.js]
 esid: sec-regexpbuiltinexec
 features: [regexp-named-groups]
 info: |
@@ -14,6 +15,23 @@ info: |
     26. Perform ! CreateDataProperty(_A_, `"groups"`, _groups_).
 ---*/
 
+// `groups` is created with Define, not Set.
+let counter = 0;
+Object.defineProperty(Array.prototype, "groups", {
+  set() { counter++; }
+});
+
+let match = /(?<x>.)/.exec("a");
+assert.sameValue(counter, 0);
+
+// `groups` is writable, enumerable and configurable
+// (from CreateDataProperty).
+verifyProperty(match, "groups", {
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
 // The `__proto__` property on the groups object is not special,
 // and does not affect the [[Prototype]] of the resulting groups object.
 let {groups} = /(?<__proto__>.)/.exec("a");