diff --git a/1-js/03-code-quality/05-testing-mocha/article.md b/1-js/03-code-quality/05-testing-mocha/article.md
index 68ffcae4..9037b484 100644
--- a/1-js/03-code-quality/05-testing-mocha/article.md
+++ b/1-js/03-code-quality/05-testing-mocha/article.md
@@ -2,7 +2,7 @@
 
 Automated testing will be used in further tasks, and it's also widely used in real projects.
 
-## Why we need tests?
+## Why do we need tests?
 
 When we write a function, we can usually imagine what it should do: which parameters give which results.