diff --git a/curriculum/challenges/english/03-front-end-libraries/sass/create-reusable-css-with-mixins.english.md b/curriculum/challenges/english/03-front-end-libraries/sass/create-reusable-css-with-mixins.english.md
index d9aa545908..31dc3bdb80 100644
--- a/curriculum/challenges/english/03-front-end-libraries/sass/create-reusable-css-with-mixins.english.md
+++ b/curriculum/challenges/english/03-front-end-libraries/sass/create-reusable-css-with-mixins.english.md
@@ -55,11 +55,11 @@ Write a mixin for <code>border-radius</code> and give it a <code>$radius</code>
 tests:
   - text: Your code should declare a mixin named <code>border-radius</code> which has a parameter named <code>$radius</code>.
     testString: assert(code.match(/@mixin\s+?border-radius\s*?\(\s*?\$radius\s*?\)\s*?{/gi));
-  - text: Your code should include the <code>-webkit-border-radius</code> vender prefix that uses the <code>$radius</code> parameter.
+  - text: Your code should include the <code>-webkit-border-radius</code> vendor prefix that uses the <code>$radius</code> parameter.
     testString: assert(code.match(/-webkit-border-radius:\s*?\$radius;/gi));
-  - text: Your code should include the <code>-moz-border-radius</code> vender prefix that uses the <code>$radius</code> parameter.
+  - text: Your code should include the <code>-moz-border-radius</code> vendor prefix that uses the <code>$radius</code> parameter.
     testString: assert(code.match(/-moz-border-radius:\s*?\$radius;/gi));
-  - text: Your code should include the <code>-ms-border-radius</code> vender prefix that uses the <code>$radius</code> parameter.
+  - text: Your code should include the <code>-ms-border-radius</code> vendor prefix that uses the <code>$radius</code> parameter.
     testString: assert(code.match(/-ms-border-radius:\s*?\$radius;/gi));
   - text: Your code should include the general <code>border-radius</code> rule that uses the <code>$radius</code> parameter.
     testString: assert(code.match(/border-radius:\s*?\$radius;/gi).length == 4);