diff --git a/docs/docs/10.4-test-utils.md b/docs/docs/10.4-test-utils.md
index 7606cf2f56..aacd81a63f 100644
--- a/docs/docs/10.4-test-utils.md
+++ b/docs/docs/10.4-test-utils.md
@@ -73,7 +73,7 @@ Returns true if `instance` is a DOM component (such as a `<div>` or `<span>`).
 boolean isCompositeComponent(ReactComponent instance)`
 ```
 
-Returns true if `instance` is a composite component (created with `React.createClass()`)
+Returns true if `instance` is a composite component (created with `React.createClass()`).
 
 ### isCompositeComponentWithType