diff --git a/tox.ini b/tox.ini
index 82dba92..7a21b1f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -161,3 +161,12 @@
 commands=
     pip-extra-reqs -d --ignore-file=tempest/tests/* tempest
     pip-missing-reqs -d --ignore-file=tempest/tests/* tempest
+
+
+[testenv:bindep]
+# Do not install any requirements. We want this to be fast and work even if
+# system dependencies are missing, since it's used to tell you what system
+# dependencies are missing! This also means that bindep must be installed
+# separately, outside of the requirements files.
+deps = bindep
+commands = bindep test