diff --git a/.github/workflows/sglang-benchmark.yml b/.github/workflows/sglang-benchmark.yml
index f7f3a7a..06cbab9 100644
--- a/.github/workflows/sglang-benchmark.yml
+++ b/.github/workflows/sglang-benchmark.yml
@@ -65,6 +65,7 @@ jobs:
   benchmarks:
     name: Run SGLang benchmarks
     needs: set-parameters
+    if: ${{ !github.event.pull_request.head.repo.fork && github.repository_owner == 'pytorch' }}
     strategy:
       matrix: ${{ fromJson(needs.set-parameters.outputs.benchmark_matrix) }}
       fail-fast: false
diff --git a/.github/workflows/vllm-benchmark.yml b/.github/workflows/vllm-benchmark.yml
index 0cda031..ed8f740 100644
--- a/.github/workflows/vllm-benchmark.yml
+++ b/.github/workflows/vllm-benchmark.yml
@@ -66,6 +66,7 @@ jobs:
   benchmarks:
     name: Run vLLM benchmarks
     needs: set-parameters
+    if: ${{ !github.event.pull_request.head.repo.fork && github.repository_owner == 'pytorch' }}
     strategy:
       matrix: ${{ fromJson(needs.set-parameters.outputs.benchmark_matrix) }}
       fail-fast: false
diff --git a/.github/workflows/vllm-ci-test.yml b/.github/workflows/vllm-ci-test.yml
index eed96df..f3cc31b 100644
--- a/.github/workflows/vllm-ci-test.yml
+++ b/.github/workflows/vllm-ci-test.yml
@@ -27,6 +27,7 @@ concurrency:
 jobs:
   test:
     name: Run vLLM tests
+    if: ${{ !github.event.pull_request.head.repo.fork && github.repository_owner == 'pytorch' }}
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/vllm-profiling.yml b/.github/workflows/vllm-profiling.yml
index 93c50c3..8ecf0d9 100644
--- a/.github/workflows/vllm-profiling.yml
+++ b/.github/workflows/vllm-profiling.yml
@@ -37,6 +37,7 @@ jobs:
   profiling:
     name: Run vLLM profiling
     needs: set-parameters
+    if: ${{ !github.event.pull_request.head.repo.fork && github.repository_owner == 'pytorch' }}
     strategy:
       fail-fast: false
       matrix: