diff --git a/.github/workflows/tpu-tests.yml b/.github/workflows/tpu-tests.yml
index 2e5d2745b8..f4900c5461 100644
--- a/.github/workflows/tpu-tests.yml
+++ b/.github/workflows/tpu-tests.yml
@@ -9,8 +9,7 @@ on:
       - "src/pytorch_lightning/**"
       - "tests/tests_pytorch/**"
       - "setup.cfg"  # includes pytest config
-  # TODO: use _target after merge to share secrets
-  pull_request:
+  pull_request_target:
     branches: [master, "release/*"]
     types: [opened, reopened, ready_for_review, synchronize]  # add `ready_for_review` since draft is skipped
     paths: