diff --git a/buildpack/.github/workflows/test-pull-request.yml b/buildpack/.github/workflows/test-pull-request.yml
index 5a07e6e..ad910bb 100644
--- a/buildpack/.github/workflows/test-pull-request.yml
+++ b/buildpack/.github/workflows/test-pull-request.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - develop
+      - master
 
 jobs:
   unit: