diff --git a/zuul.d/project-templates.yaml b/zuul.d/project-templates.yaml
index d0cf644b..e31d8000 100644
--- a/zuul.d/project-templates.yaml
+++ b/zuul.d/project-templates.yaml
@@ -755,10 +755,12 @@
       that do not use constraints.
     check:
       jobs:
-        - tox-py35
+        - tox-py35:
+            nodeset: ubuntu-xenial
     gate:
       jobs:
-        - tox-py35
+        - tox-py35:
+            nodeset: ubuntu-xenial
     post:
       jobs:
         - publish-openstack-python-branch-tarball