diff --git a/DevOpsPipelineDefinitions/validation-pipeline.yaml b/DevOpsPipelineDefinitions/validation-pipeline.yaml
index 478e5c2928e..ca2ac9a30eb 100644
--- a/DevOpsPipelineDefinitions/validation-pipeline.yaml
+++ b/DevOpsPipelineDefinitions/validation-pipeline.yaml
@@ -4,7 +4,13 @@
 name: '$(Build.DefinitionName)-$(Build.DefinitionVersion)-$(System.PullRequest.PullRequestNumber)-$(Date:yyyyMMdd)-$(Rev:r)'
 
 trigger: none
-pr: none
+pr:
+  branches:
+   include:
+     - master
+  paths:
+    include:
+      - manifests
 
 jobs: