diff --git a/tox.ini b/tox.ini
index 52edf322f4c..c61920a73f3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -88,8 +88,8 @@ setenv = {[testenv:dsvm-functional]setenv}
 deps = {[testenv:dsvm-functional]deps}
 commands =
   bash {toxinidir}/tools/deploy_rootwrap.sh {toxinidir} {envdir}/etc {envdir}/bin
-  stestr run --slowest --exclude-regex (.*MySQL\.|.*PostgreSQL\.|.*test_get_all_devices|.*TestMetadataAgent\.|.*BaseOVSTestCase\.) {posargs}
-  stestr run --slowest --combine --concurrency 1 (.*MySQL\.|.*PostgreSQL\.|.*test_get_all_devices|.*TestMetadataAgent\.|.*BaseOVSTestCase\.) {posargs}
+  stestr run --slowest --exclude-regex (.*MySQL\.|.*PostgreSQL\.|.*test_get_all_devices|.*TestMetadataAgent\.|.*BaseOVSTestCase\.|.*test_periodic_sync_routers_task) {posargs}
+  stestr run --slowest --combine --concurrency 1 (.*MySQL\.|.*PostgreSQL\.|.*test_get_all_devices|.*TestMetadataAgent\.|.*BaseOVSTestCase\.|.*test_periodic_sync_routers_task) {posargs}
 
 [testenv:dsvm-fullstack]
 description =