diff --git a/.github/workflows/build_tests.yaml b/.github/workflows/build_tests.yaml
index acd131116..dff859454 100644
--- a/.github/workflows/build_tests.yaml
+++ b/.github/workflows/build_tests.yaml
@@ -17,7 +17,7 @@ name: Build Tests
 on:
   push:
     branches: ["main"]
-  pull_request: # By default this runs for types assigned, opened and synchronize.
+  pull_request_target: # By default this runs for types assigned, opened and synchronize.
 
 env:
   # Names must be unique in parallel running tests.
@@ -145,6 +145,8 @@ jobs:
     - name: Delete the cluster created
       if: always()
       run: python xpk.py cluster delete --cluster $TPU_CLUSTER_NAME --zone=us-central2-b
+    - name: Check fork workflows
+      run: echo "Check PR workflows"
 
 
 
diff --git a/README.md b/README.md
index 7358cea3c..479f0ce77 100644
--- a/README.md
+++ b/README.md
@@ -1266,3 +1266,6 @@ Please note that all other xpk subcommands are intended for use with cloud syste
 
 # Other advanced usage
 [Use a Jupyter notebook to interact with a Cloud TPU cluster](xpk-notebooks.md)
+
+# Fork PR test
+Creating PR from a fork from unaffiliated account.