Updates README.md

README.md

@@ -21,17 +21,22 @@ sudo make install
 - build
 - wheel
 
-## Building
+## Building & test
 
-`python3 -m build`
-
-## Run tests
+```
+# Building
+python3 -m build
 
-`bash test.sh`
+# create test virtualenv
+python3 -m venv rnnoise_venv
+source rnnoise_venv/bin/activate
 
-## Installing
+# Install
+python3 -m pip install dist/pyrnnoise*.whl
 
-`pip install dist/pyrnnoise*.whl`
+# run test
+bash test.sh
+```
 
 ## Examples