diff --git a/molecule-requirements.txt b/molecule-requirements.txt
index da76ff2e8..e05cd4858 100644
--- a/molecule-requirements.txt
+++ b/molecule-requirements.txt
@@ -9,6 +9,7 @@ pytest-html
 pytest-xdist
 mock
 molecule>=3.0,<3.1
+ruamel.yaml
 testinfra
 netaddr
 jinja2>=2.8.0,<3
diff --git a/zuul.d/layout.yaml b/zuul.d/layout.yaml
index 72727595d..1af701d51 100644
--- a/zuul.d/layout.yaml
+++ b/zuul.d/layout.yaml
@@ -10,7 +10,9 @@
       - openstack-tox-docs: &tripleo-docs
           files:
           - ^doc/.*
+          - ^molecule-requirements.txt
           - ^README.rst
+          - ^requirements.txt
       - tripleo-ci-centos-7-containers-multinode: &containers_multinode
           dependencies: &deps
             - openstack-tox-linters