1 files changed, 1 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index 576bd69e27..f8f9f81e99 100644
--- a/tox.ini
+++ b/tox.ini
@@ -76,7 +76,7 @@ deps =
 commands =
   {toxinidir}/tools/generate_dhclient_script_for_fullstack.sh {envdir}
   {toxinidir}/tools/deploy_rootwrap.sh {toxinidir} {envdir}/etc {envdir}/bin
-  stestr run --concurrency 4 {posargs}
+  stestr run --concurrency 3 {posargs}
 
 [testenv:dsvm-fullstack-gate]
 setenv = {[testenv:dsvm-fullstack]setenv}