diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index 51c1a14..4af204f 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -3,7 +3,10 @@ name: shellcheck
 permissions:
   checks: write
 
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
 
 jobs:
   lint:
diff --git a/.github/workflows/test-monorepo.yml b/.github/workflows/test-monorepo.yml
index 548b778..6e5884d 100644
--- a/.github/workflows/test-monorepo.yml
+++ b/.github/workflows/test-monorepo.yml
@@ -1,5 +1,8 @@
 name: test-monorepo
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
 jobs:
   # test npm publish dry-run
   checkout_publish_skunkworks_dry_run:
diff --git a/.github/workflows/test-polyrepo.yml b/.github/workflows/test-polyrepo.yml
index 074981b..b916917 100644
--- a/.github/workflows/test-polyrepo.yml
+++ b/.github/workflows/test-polyrepo.yml
@@ -1,5 +1,8 @@
 name: test-polyrepo
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
 jobs:
   # test npm publish dry-run
   checkout_publish_controllers_dry_run:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 11c4db4..3e6b187 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,5 +1,8 @@
 name: test
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
 jobs:
   test:
     runs-on: ubuntu-20.04