bpo-34381: refer to 'Running & Writing Tests' in README.rst (GH-8797)

miss-islington · michael-o · web-flow · commit eeece3cd331a · 2018-08-17T17:57:41.000-04:00
(cherry picked from commit cae8ff9) Co-authored-by: Michael Osipov <1983-01-06@gmx.net>
diff --git a/README.rst b/README.rst
@@ -188,6 +188,8 @@ If the failure persists and appears to be a problem with Python rather than
 your environment, you can `file a bug report <https://bugs.python.org>`_ and
 include relevant output from that command to show the issue.
 
+See `Running & Writing Tests <https://devguide.python.org/runtests/>`_
+for more on running tests.
 
 Installing multiple versions
 ----------------------------
