diff --git a/.github/workflows/testbuild.yml b/.github/workflows/testbuild.yml
index 761c91192..f781afd4c 100644
--- a/.github/workflows/testbuild.yml
+++ b/.github/workflows/testbuild.yml
@@ -13,7 +13,8 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
           fetch-depth: 0
 
       - name: Prettify code
@@ -31,6 +32,8 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
         with:
+          ref: ${{ github.event.pull_request.head.ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
           fetch-depth: 0
 
       - name: Setup Node