diff --git a/curriculum/challenges/arabic/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.arabic.md b/curriculum/challenges/arabic/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.arabic.md
index 5f3555b383..dc22f69804 100644
--- a/curriculum/challenges/arabic/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.arabic.md
+++ b/curriculum/challenges/arabic/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.arabic.md
@@ -18,7 +18,7 @@ undefined
 ```yml
 tests:
   - text: ''
-    testString: 'assert(function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");}, "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
+    testString: 'assert((function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");})(), "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
 
 ```
 
diff --git a/curriculum/challenges/chinese/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.chinese.md b/curriculum/challenges/chinese/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.chinese.md
index 7b463841e0..7f6653ac65 100644
--- a/curriculum/challenges/chinese/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.chinese.md
+++ b/curriculum/challenges/chinese/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.chinese.md
@@ -18,7 +18,7 @@ localeTitle: 在ES6中创建和添加集
 ```yml
 tests:
   - text: '您的<code>Set</code>应该只包含值<code>1, 2, 3, Taco, Cat, Awesome</code> 。'
-    testString: 'assert(function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");}, "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
+    testString: 'assert((function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");})(), "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
 
 ```
 
diff --git a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.english.md b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.english.md
index d88fa10d5b..fb644f32ec 100644
--- a/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.english.md
+++ b/curriculum/challenges/english/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.english.md
@@ -29,8 +29,8 @@ For this exercise, return a set with the following values: <code>1, 2, 3, 'Taco'
 
 ```yml
 tests:
-  - text: Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.
-    testString: assert((function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has('Taco') && test.has('Cat') && test.has('Awesome');})(), 'Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.');
+  - text: 'Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.'
+    testString: 'assert((function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");})(), "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
 
 ```
 
diff --git a/curriculum/challenges/portuguese/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.portuguese.md b/curriculum/challenges/portuguese/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.portuguese.md
index eb2bf0695b..c4fd946f5d 100644
--- a/curriculum/challenges/portuguese/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.portuguese.md
+++ b/curriculum/challenges/portuguese/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.portuguese.md
@@ -18,7 +18,7 @@ undefined
 ```yml
 tests:
   - text: 'Seu <code>Set</code> deve conter apenas os valores <code>1, 2, 3, Taco, Cat, Awesome</code> .'
-    testString: 'assert(function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");}, "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
+    testString: 'assert((function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");})(), "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
 
 ```
 
diff --git a/curriculum/challenges/russian/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.russian.md b/curriculum/challenges/russian/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.russian.md
index 0fb0470ea6..0202f58c7a 100644
--- a/curriculum/challenges/russian/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.russian.md
+++ b/curriculum/challenges/russian/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.russian.md
@@ -18,7 +18,7 @@ localeTitle: Создание и добавление к наборам в ES6
 ```yml
 tests:
   - text: 'Ваш <code>Set</code> должен содержать только значения <code>1, 2, 3, Taco, Cat, Awesome</code> .'
-    testString: 'assert(function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");}, "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
+    testString: 'assert((function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");})(), "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
 
 ```
 
diff --git a/curriculum/challenges/spanish/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.spanish.md b/curriculum/challenges/spanish/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.spanish.md
index 01701c87e4..7b8871315f 100644
--- a/curriculum/challenges/spanish/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.spanish.md
+++ b/curriculum/challenges/spanish/08-coding-interview-prep/data-structures/create-and-add-to-sets-in-es6.spanish.md
@@ -18,7 +18,7 @@ localeTitle: Crear y agregar a conjuntos en ES6
 ```yml
 tests:
   - text: 'Su <code>Set</code> solo debe contener los valores <code>1, 2, 3, Taco, Cat, Awesome</code> .'
-    testString: 'assert(function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");}, "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
+    testString: 'assert((function(){var test = checkSet(); return (test.size == 6) && test.has(1) && test.has(2) && test.has(3) && test.has("Taco") && test.has("Cat") && test.has("Awesome");})(), "Your <code>Set</code> should only contain the values <code>1, 2, 3, Taco, Cat, Awesome</code>.");'
 
 ```