diff --git a/docs/contributing/testing/unit-and-functional.rst b/docs/contributing/testing/unit-and-functional.rst
--- a/docs/contributing/testing/unit-and-functional.rst
+++ b/docs/contributing/testing/unit-and-functional.rst
@@ -14,9 +14,6 @@ py.test based test suite
 The test suite is in the folder :file:`rhodecode/tests/` and should be run with
 the test runner `py.test` inside of your `nix-shell` environment::
 
-   # In case you need the cythonized version
-   CYTHONIZE=1 python setup.py develop --prefix=$tmp_path
-
    py.test rhodecode