diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 73a217c6348..54b4ddbf123 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -28,6 +28,7 @@ jobs:
     name: Build (${{ matrix.buildSystem }}) (exectable target built using ${{ matrix.executableTargetBuildSystem }})
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@0.0.8
     with:
+      enable_cross_pr_testing: true
       linux_os_versions: '["amazonlinux2", "bookworm", "noble", "jammy", "rhel-ubi9"]'
       linux_swift_versions: ${{ matrix.linuxSwiftVersion }}
       linux_pre_build_command: ./.github/scripts/prebuild.sh