diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4549def9b..a2e99c475 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,11 @@
 name: build and test
 on:
   push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 jobs:
   build: