diff --git a/.github/workflows/pr-gpu.yaml b/.github/workflows/pr-gpu.yaml
index 04f30b5f9c..ba1a4f9ba4 100644
--- a/.github/workflows/pr-gpu.yaml
+++ b/.github/workflows/pr-gpu.yaml
@@ -4,7 +4,7 @@ on:
     branches:
     - main
     - release/*
-  pull_request:
+  pull_request_target:
     branches:
     - main
     - release/**
@@ -16,6 +16,7 @@ concurrency:
 jobs:
   pytest-gpu-1:
     name: ${{ matrix.name }}
+    if: github.repository_owner == 'mosaicml'
     runs-on: linux-ubuntu-latest
     strategy:
       fail-fast: false
@@ -44,6 +45,7 @@ jobs:
         ci_repo_gpu_test_ref: ${{ matrix.ci_repo_gpu_test_ref }}
   pytest-gpu-2:
     name: ${{ matrix.name }}
+    if: github.repository_owner == 'mosaicml'
     runs-on: linux-ubuntu-latest
     strategy:
       fail-fast: false
@@ -72,6 +74,7 @@ jobs:
         ci_repo_gpu_test_ref: ${{ matrix.ci_repo_gpu_test_ref }}
   pytest-gpu-4:
     name: ${{ matrix.name }}
+    if: github.repository_owner == 'mosaicml'
     runs-on: linux-ubuntu-latest
     strategy:
       fail-fast: false