diff --git a/.github/workflows/check-nightly-olm-bundle.yaml b/.github/workflows/check-nightly-olm-bundle.yaml
index 1bc7aec03..5e287dea1 100644
--- a/.github/workflows/check-nightly-olm-bundle.yaml
+++ b/.github/workflows/check-nightly-olm-bundle.yaml
@@ -11,11 +11,12 @@
 #
 
 name: Check nightly OLM bundle
-on: pull_request
+on:
+  pull_request:
+    branches:
+      - master
 jobs:
-
   build:
-    name: Check nightly OLM bundle
     runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v2