diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d4138dff..17ca70d9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,11 @@
 name: Run Securesystemslib tests
 
-on: [push, pull_request, workflow_dispatch]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  workflow_dispatch:
 
 jobs:
   build: