diff --git a/tox.ini b/tox.ini
index 0a3b3e4be..36743b3a6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -183,6 +183,10 @@ extension =
 paths = ./designate/hacking
 
 [testenv:lower-constraints]
+skip_install = True
+commands =
+  python -m pip install --no-deps -U .
+  stestr run {posargs}
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt