diff --git a/.github/workflows/black.yml b/.github/workflows/black.yml
index 63be4c1..71cc175 100644
--- a/.github/workflows/black.yml
+++ b/.github/workflows/black.yml
@@ -1,6 +1,10 @@
 name: "Black"
 
-on: [push]
+on:
+  pull_request:
+  push:
+    branches:
+      - main
 jobs:
   black:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/linters.yml b/.github/workflows/linters.yml
index 3957827..d7e44cf 100644
--- a/.github/workflows/linters.yml
+++ b/.github/workflows/linters.yml
@@ -1,6 +1,10 @@
 name: "Linters"
 
-on: [push]
+on:
+  pull_request:
+  push:
+    branches:
+      - main
 jobs:
   pylint:
     name: Python Code Quality and Lint
diff --git a/.github/workflows/packaging_test.yml b/.github/workflows/packaging_test.yml
index ac3a748..b5dd2f0 100644
--- a/.github/workflows/packaging_test.yml
+++ b/.github/workflows/packaging_test.yml
@@ -1,6 +1,10 @@
 name: "Packaging Test"
 
-on: [push]
+on:
+  pull_request:
+  push:
+    branches:
+      - main
 jobs:
   coverage:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/unittests.yml b/.github/workflows/unittests.yml
index 197f9a1..a540740 100644
--- a/.github/workflows/unittests.yml
+++ b/.github/workflows/unittests.yml
@@ -1,6 +1,9 @@
 name: "Unittests"
-
-on: [push]
+on:
+  pull_request:
+  push:
+    branches:
+      - main
 jobs:
   pytest:
     runs-on: ${{ matrix.os }}