diff --git a/tox.ini b/tox.ini
index f182c21..5b049c6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -38,3 +38,11 @@ exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,__in
 [hacking]
 import_exceptions =
     oslo_i18n._i18n._
+
+[testenv:pip-missing-reqs]
+# do not install test-requirements as that will pollute the virtualenv for
+# determining missing packages
+# this also means that pip-missing-reqs must be installed separately, outside
+# of the requirements.txt files
+deps = pip_missing_reqs
+commands = pip-missing-reqs -d --ignore-module=oslo_i18n* --ignore-file=oslo_i18n/tests/* --ignore-file=tests/ oslo_i18n