diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b7a0b55f..81adb196 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -86,7 +86,13 @@ Note that `OPTUNA_DASHBOARD_DEBUG=1` makes the server will automatically restart
 
 ### Running tests, lint checks and formatters
 
-#### Running Python unit tests
+#### Running unit tests for `tslib/`
+
+```
+$ make tslib-test
+```
+
+#### Running unit tests for `python_tests/`
 
 ```
 $ pytest python_tests/
@@ -147,7 +153,7 @@ Please install [wasm-pack](https://rustwasm.github.io/wasm-pack/installer/) and
 $ make serve-browser-app
 ```
 
-Open http://127.0.0.1:9000/
+Open http://localhost:5173/
 
 
 ## VS Code Extension
diff --git a/Makefile b/Makefile
index 9cfcc4b5..f44ce36a 100644
--- a/Makefile
+++ b/Makefile
@@ -24,6 +24,11 @@ tslib:
 	cd tslib/storage && npm i && npm run build
 	cd tslib/react && npm i && npm run build
 
+.PHONY: tslib-test
+tslib-test: tslib
+	cd tslib/react/test && python generate_assets.py && npm run test
+	cd tslib/storage/test && python generate_assets.py && npm run test
+
 .PHONY: serve-browser-app
 serve-browser-app: tslib $(RUSTLIB_OUT)
 	cd standalone_app && npm run watch