diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 09b8412..5b77c0b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -2,6 +2,8 @@ name: "install-nix-action test"
 on:
   pull_request:
   push:
+    branches:
+      - master
 
 jobs:
   simple-build: