diff --git a/TESTING.rst b/TESTING.rst
index 05bce0749b6..9ff75b66bbf 100644
--- a/TESTING.rst
+++ b/TESTING.rst
@@ -520,7 +520,7 @@ For example, to run against the 'master' branch of neutron-lib::
     cd $SRC
     git clone https://opendev.org/openstack/neutron-lib
     cd $NEUTRON_DIR
-    env TOX_ENV_SRC_MODULES=$SRC/neutron-lib tox -r -e pep8,py37
+    env TOX_ENV_SRC_MODULES=$SRC/neutron-lib tox -r -e py37
 
 To run against a change of your own, repeat the same steps, but use the
 directory with your changes, not a fresh clone.
@@ -533,7 +533,7 @@ desired gerrit refs for this example)::
     cd neutron-lib
     git fetch https://opendev.org/openstack/neutron-lib refs/changes/13/635313/6 && git checkout FETCH_HEAD
     cd $NEUTRON_DIR
-    env TOX_ENV_SRC_MODULES=$SRC/neutron-lib tox -r -e pep8,py37
+    env TOX_ENV_SRC_MODULES=$SRC/neutron-lib tox -r -e py37
 
 Note that the '-r' is needed to re-create the tox virtual envs, and will also
 be needed to restore them to standard when not using this method.
@@ -542,7 +542,7 @@ Any pip installable package can be overriden with this environment variable,
 not just neutron-lib. To specify multiple packages to override, specify them
 as a space separated list to TOX_ENV_SRC_MODULES. Example::
 
-    env TOX_ENV_SRC_MODULES="$SRC/neutron-lib $SRC/oslo.db" tox -r -e pep8,py37
+    env TOX_ENV_SRC_MODULES="$SRC/neutron-lib $SRC/oslo.db" tox -r -e py37
 
 Functional Tests
 ~~~~~~~~~~~~~~~~