diff --git a/.github/workflows/build-core.yml b/.github/workflows/build-core.yml
index 5b3378f1..66677fcb 100644
--- a/.github/workflows/build-core.yml
+++ b/.github/workflows/build-core.yml
@@ -39,14 +39,14 @@ jobs:
       # Test results report
       - name: Report test results
         uses: dorny/test-reporter@v1
-        if: success() || failure()
+        if: success() || failure() && github.event.pull_request.head.repo.full_name == github.repository
         with:
           name: Mocha tests
           path: test-results.json
           reporter: mocha-json
 
       - name: Report code coverage
-        if: ${{ github.event_name == 'pull_request' }}
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
         uses: romeovs/lcov-reporter-action@v0.2.16
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
@@ -54,13 +54,14 @@ jobs:
 
       - name: Check code coverage threshold
         uses: VeryGoodOpenSource/very_good_coverage@v2
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
         with:
           path: ./coverage/lcov.info
           min_coverage: 50
 
       # Build and push container image to GCR (only on main branch)
       - name: Log in to the GitHub Container Registry
-        if: ${{ github.ref == 'refs/heads/main' }}
+        if: github.ref == 'refs/heads/main'
         uses: docker/login-action@v1
         with:
           registry: ghcr.io
@@ -78,6 +79,7 @@ jobs:
 
       # Build and push container image to ECR
       - name: Configure AWS credentials
+        if: ${{ github.event_name != 'pull_request' }}
         uses: aws-actions/configure-aws-credentials@v2
         with:
           role-to-assume: arn:aws:iam::${{ secrets.AWS_ACCOUNT_ID }}:role/${{ secrets.AWS_BUILD_INVOCATION_ROLE }}
@@ -107,7 +109,7 @@ jobs:
 
       # Success notification
       - name: Send Slack success notification
-        if: success()
+        if: success() && ${{ github.event_name != 'pull_request' }}
         env:
           SLACK_TITLE: Build succeeded!
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
@@ -115,7 +117,7 @@ jobs:
 
       # Failure notification
       - name: Send Slack failure notification
-        if: failure()
+        if: failure() && ${{ github.event_name != 'pull_request' }}
         env:
           SLACK_TITLE: Build failed!
           SLACK_COLOR: danger