diff --git a/tox.ini b/tox.ini
index 010d25f8ac26..98131179c288 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,12 @@
 [tox]
 minversion = 3.18.0
 envlist = py3,functional,pep8
+# NOTE(elod.illes): latest virtualenv bundles setuptools 82.0.0, which
+# dropped pkg_resources module source from the package, which is used
+# in nova and other packages, thus virtualenv needs to be pinned to fix
+# the gate.
+requires =
+    virtualenv<20.37.0
 
 [testenv]
 usedevelop = True