Specify to install test dependencies for contributors.

PGijsbers · PGijsbers · commit 331e827c6dae · 2019-04-16T12:26:30.000+02:00
diff --git a/doc/contributing.rst b/doc/contributing.rst
@@ -95,7 +95,8 @@ execute
 
 .. code:: bash
 
-    python setup.py install
+    pip install -e ".[test]"
+
 
 Testing
 =======
