diff --git a/docs/customization-guide.md b/docs/customization-guide.md
index 4c302eb1..2bf2d1e0 100644
--- a/docs/customization-guide.md
+++ b/docs/customization-guide.md
@@ -136,7 +136,7 @@ To start the test watcher, run
 
     yarn test
 
-See more in the [testing documentation](docs/testing.md).
+See more in the [testing documentation](testing.md).
 
 ## Customization