diff --git a/.github/workflows/debug_build.yml b/.github/workflows/debug_build.yml
index 52d06aa0..47ba0edd 100644
--- a/.github/workflows/debug_build.yml
+++ b/.github/workflows/debug_build.yml
@@ -1,6 +1,12 @@
 name: Build
 
-on: push
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 jobs:
   build:
diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 8d208c16..87ccc686 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -1,6 +1,12 @@
 name: Unit tests
 
-on: push
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 jobs:
   testing: