diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 8c7983d4f..34cbaa880 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -2,11 +2,13 @@ name: Testing
 on:
   pull_request:
   push:
-    branches: main
 
 jobs:
   validate:
     runs-on: ubuntu-latest
+    if: github.event_name != 'pull_request' ||
+      github.event.pull_request.head.repo.full_name !=
+      github.event.pull_request.base.repo.full_name
     steps:
       - name: Checkout the source code
         uses: actions/checkout@master
@@ -17,6 +19,9 @@ jobs:
 
   lint:
     runs-on: ubuntu-latest
+    if: github.event_name != 'pull_request' ||
+      github.event.pull_request.head.repo.full_name !=
+      github.event.pull_request.base.repo.full_name
     steps:
       - name: Checkout the source code
         uses: actions/checkout@master
@@ -28,6 +33,9 @@ jobs:
 
   testing:
     runs-on: ubuntu-latest
+    if: github.event_name != 'pull_request' ||
+      github.event.pull_request.head.repo.full_name !=
+      github.event.pull_request.base.repo.full_name
     steps:
       - name: Checkout the source code
         uses: actions/checkout@master