diff --git a/playbooks/github-wip/run.yaml b/playbooks/github-wip/run.yaml
index 81d9056..7f39570 100644
--- a/playbooks/github-wip/run.yaml
+++ b/playbooks/github-wip/run.yaml
@@ -1,3 +1,4 @@
+---
 - hosts: localhost
   roles:
     - role: check-github-pr-is-wip
diff --git a/roles/check-github-pr-is-wip/tasks/main.yaml b/roles/check-github-pr-is-wip/tasks/main.yaml
index 907433c..64f75d4 100644
--- a/roles/check-github-pr-is-wip/tasks/main.yaml
+++ b/roles/check-github-pr-is-wip/tasks/main.yaml
@@ -1,2 +1,3 @@
+---
 - name: Check for WIP labels or WIP title keywords on a GitHub PR
   script: github_wip.py {{ github_pr }} '{{ wip_keywords }}' '{{ wip_labels }}'
diff --git a/zuul.d/jobs.yaml b/zuul.d/jobs.yaml
index 5c8dac5..879a873 100644
--- a/zuul.d/jobs.yaml
+++ b/zuul.d/jobs.yaml
@@ -1,3 +1,4 @@
+---
 # Shared zuul config specific to Kata Containers Zuul tenant
 # Contains definitions of trusted jobs
 
@@ -13,7 +14,8 @@
     vars:
       tox_envlist: linters
       tox_environment:
-        ANSIBLE_ROLES_PATH: ~/src/git.openstack.org/openstack-infra/zuul-jobs/roles:~/src/git.openstack.org/kata-containers/zuul-config/roles
+        ANSIBLE_ROLES_PATH: >
+          ~/src/git.openstack.org/openstack-infra/zuul-jobs/roles:~/src/git.openstack.org/kata-containers/zuul-config/roles
 
 - job:
     name: kata-github-wip
diff --git a/zuul.d/pipelines.yaml b/zuul.d/pipelines.yaml
index 29818c0..389a5b0 100644
--- a/zuul.d/pipelines.yaml
+++ b/zuul.d/pipelines.yaml
@@ -1,3 +1,4 @@
+---
 # Shared zuul config specific to the Kata Containers Zuul tenant
 # Contains definitions of pipelines
 
@@ -14,8 +15,8 @@
     precedence: low
     require:
       gerrit:
-        open: True
-        current-patchset: True
+        open: true
+        current-patchset: true
     trigger:
       gerrit:
         - event: patchset-created
@@ -43,11 +44,11 @@
       http://docs.openstack.org/infra/manual/developers.html#automated-testing
     manager: dependent
     precedence: normal
-    post-review: True
+    post-review: true
     require:
       gerrit:
-        open: True
-        current-patchset: True
+        open: true
+        current-patchset: true
     trigger:
       gerrit:
         - event: comment-added
diff --git a/zuul.d/project-templates.yaml b/zuul.d/project-templates.yaml
index 0f814ee..d8905f6 100644
--- a/zuul.d/project-templates.yaml
+++ b/zuul.d/project-templates.yaml
@@ -1,3 +1,4 @@
+---
 - project-template:
     name: kata-pre-checks
     description: |
diff --git a/zuul.d/projects.yaml b/zuul.d/projects.yaml
index e6f86bb..5b63f6f 100644
--- a/zuul.d/projects.yaml
+++ b/zuul.d/projects.yaml
@@ -1,3 +1,4 @@
+---
 # Shared zuul config specific to the Kata Containers Zuul tenant
 # Contains job pipeline definitions for each project