diff --git a/test/built-ins/Iterator/prototype/Symbol.toStringTag/prop-desc.js b/test/built-ins/Iterator/prototype/Symbol.toStringTag/prop-desc.js
index 424a15b79f..ec91a6234b 100644
--- a/test/built-ins/Iterator/prototype/Symbol.toStringTag/prop-desc.js
+++ b/test/built-ins/Iterator/prototype/Symbol.toStringTag/prop-desc.js
@@ -6,13 +6,11 @@ description: Property descriptor
 info: |
   `Iterator.prototype[@@toStringTag]` is an accessor property with attributes { [[Enumerable]]: *false*, [[Configurable]]: *true* }
 features: [iterator-helpers]
-includes: [propertyHelper.js]
 ---*/
-verifyConfigurable(Iterator.prototype, Symbol.toStringTag);
-verifyNotEnumerable(Iterator.prototype, Symbol.toStringTag);
-
 let desc = Object.getOwnPropertyDescriptor(Iterator.prototype, Symbol.toStringTag);
 assert.sameValue(typeof desc.get, 'function');
 assert.sameValue(typeof desc.set, 'function');
+assert.sameValue(desc.configurable, true);
+assert.sameValue(desc.enumerable, false);
 assert.sameValue(desc.value, undefined);
 assert.sameValue(desc.writable, undefined);
diff --git a/test/built-ins/Iterator/prototype/Symbol.toStringTag/weird-setter.js b/test/built-ins/Iterator/prototype/Symbol.toStringTag/weird-setter.js
index 281be75595..e731b1af5e 100644
--- a/test/built-ins/Iterator/prototype/Symbol.toStringTag/weird-setter.js
+++ b/test/built-ins/Iterator/prototype/Symbol.toStringTag/weird-setter.js
@@ -24,15 +24,15 @@ assert.sameValue(get.call(), 'Iterator');
 
 // 1. If _this_ is not an Object, then
 //   1. Throw a *TypeError* exception.
-assert.throws(() => set.call(undefined, ''));
-assert.throws(() => set.call(null, ''));
-assert.throws(() => set.call(true, ''));
+assert.throws(TypeError, () => set.call(undefined, ''));
+assert.throws(TypeError, () => set.call(null, ''));
+assert.throws(TypeError, () => set.call(true, ''));
 
 // 1. If _this_ is _home_, then
 //   1. NOTE: Throwing here emulates assignment to a non-writable data property on the _home_ object in strict mode code.
 //   1. Throw a *TypeError* exception.
-assert.throws(() => set.call(IteratorPrototype, ''));
-assert.throws(() => IteratorPrototype[Symbol.toStringTag] = '');
+assert.throws(TypeError, () => set.call(IteratorPrototype, ''));
+assert.throws(TypeError, () => IteratorPrototype[Symbol.toStringTag] = '');
 
 assert.sameValue(Iterator.prototype[Symbol.toStringTag], 'Iterator');
 assert.sameValue(get.call(), 'Iterator');
diff --git a/test/built-ins/Iterator/prototype/constructor/prop-desc.js b/test/built-ins/Iterator/prototype/constructor/prop-desc.js
index c67968fb64..1a5a411196 100644
--- a/test/built-ins/Iterator/prototype/constructor/prop-desc.js
+++ b/test/built-ins/Iterator/prototype/constructor/prop-desc.js
@@ -6,13 +6,11 @@ description: Property descriptor
 info: |
   `Iterator.prototype.constructor` is an accessor property with attributes { [[Enumerable]]: *false*, [[Configurable]]: *true* }
 features: [iterator-helpers]
-includes: [propertyHelper.js]
 ---*/
-verifyConfigurable(Iterator.prototype, 'constructor');
-verifyNotEnumerable(Iterator.prototype, 'constructor');
-
 let desc = Object.getOwnPropertyDescriptor(Iterator.prototype, 'constructor');
 assert.sameValue(typeof desc.get, 'function');
 assert.sameValue(typeof desc.set, 'function');
+assert.sameValue(desc.configurable, true);
+assert.sameValue(desc.enumerable, false);
 assert.sameValue(desc.value, undefined);
 assert.sameValue(desc.writable, undefined);
diff --git a/test/built-ins/Iterator/prototype/constructor/weird-setter.js b/test/built-ins/Iterator/prototype/constructor/weird-setter.js
index 67d4b601e3..319a657625 100644
--- a/test/built-ins/Iterator/prototype/constructor/weird-setter.js
+++ b/test/built-ins/Iterator/prototype/constructor/weird-setter.js
@@ -24,15 +24,15 @@ assert.sameValue(get.call(), Iterator);
 
 // 1. If _this_ is not an Object, then
 //   1. Throw a *TypeError* exception.
-assert.throws(() => set.call(undefined, ''));
-assert.throws(() => set.call(null, ''));
-assert.throws(() => set.call(true, ''));
+assert.throws(TypeError, () => set.call(undefined, ''));
+assert.throws(TypeError, () => set.call(null, ''));
+assert.throws(TypeError, () => set.call(true, ''));
 
 // 1. If _this_ is _home_, then
 //   1. NOTE: Throwing here emulates assignment to a non-writable data property on the _home_ object in strict mode code.
 //   1. Throw a *TypeError* exception.
-assert.throws(() => set.call(IteratorPrototype, ''));
-assert.throws(() => IteratorPrototype.constructor = '');
+assert.throws(TypeError, () => set.call(IteratorPrototype, ''));
+assert.throws(TypeError, () => IteratorPrototype.constructor = '');
 
 assert.sameValue(Iterator.prototype.constructor, Iterator);
 assert.sameValue(get.call(), Iterator);