diff --git a/README.md b/README.md
index a69c4571b5af7e1857eab15c0824f3b9b37251af..431827449fe4b9e0cf4fd30db2e680aec7cd9169 100644
--- a/README.md
+++ b/README.md
@@ -44,4 +44,5 @@ yarn install
 yarn dev
 ```
 
-Every piece of this library comes with its unit test sitting alongside the script. Whole library is covered by integration test sitting in `src` folder.
+Every piece of this library comes with its unit test sitting alongside the script. Whole library is covered by integration test sitting in `src` folder.  
+Note that you have to build assets first (`yarn build`) before running a test.