diff --git a/.github/workflows/build_tests.yml b/.github/workflows/build_tests.yml
index 368e7e7fd1..c71434dbb7 100644
--- a/.github/workflows/build_tests.yml
+++ b/.github/workflows/build_tests.yml
@@ -1,6 +1,12 @@
 name: Build Tests
 
-on: [push]
+on:
+  push:
+    branches:
+    - 'master'
+  pull_request:
+    branches:
+    - '*'
 
 jobs:
   build:
diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index 13882f147e..3e9e1d3205 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -1,6 +1,12 @@
 name: C/C++ CI
 
-on: [push]
+on:
+  push:
+    branches:
+    - 'master'
+  pull_request:
+    branches:
+    - '*'
 
 jobs:
   build:
diff --git a/.github/workflows/compile_nuttx.yml b/.github/workflows/compile_nuttx.yml
index 7bcca6a843..08d157da48 100644
--- a/.github/workflows/compile_nuttx.yml
+++ b/.github/workflows/compile_nuttx.yml
@@ -1,6 +1,12 @@
 name: compile nuttx
 
-on: [push]
+on:
+  push:
+    branches:
+    - 'master'
+  pull_request:
+    branches:
+    - '*'
 
 jobs:
   build:
diff --git a/.github/workflows/sitl_tests.yml b/.github/workflows/sitl_tests.yml
index 6378b043f1..a152677869 100644
--- a/.github/workflows/sitl_tests.yml
+++ b/.github/workflows/sitl_tests.yml
@@ -1,6 +1,12 @@
 name: SITL Tests
 
-on: [push]
+on:
+  push:
+    branches:
+    - 'master'
+  pull_request:
+    branches:
+    - '*'
 
 jobs:
   build:
diff --git a/.github/workflows/sitl_tests_coverage.yml b/.github/workflows/sitl_tests_coverage.yml
index d06ad36c8a..bd7d1dbee2 100644
--- a/.github/workflows/sitl_tests_coverage.yml
+++ b/.github/workflows/sitl_tests_coverage.yml
@@ -1,6 +1,12 @@
 name: SITL Tests (Code Coverage)
 
-on: [push]
+on:
+  push:
+    branches:
+    - 'master'
+  pull_request:
+    branches:
+    - '*'
 
 jobs:
   build: