diff --git a/tox.ini b/tox.ini
index d93112cf29..a3c781b289 100644
--- a/tox.ini
+++ b/tox.ini
@@ -81,7 +81,7 @@ sitepackages = True
 # https://bugs.launchpad.net/tempest/+bug/1216076 so the neutron smoke
 # job would fail if we moved it to parallel.
 commands =
-   sh tools/pretty_tox_serial.sh 'smoke {posargs}'
+   sh tools/pretty_tox_serial.sh '(?!.*\[.*\bslow\b.*\])((smoke)|(^tempest\.scenario)) {posargs}'
 
 [testenv:coverage]
 sitepackages = True