diff --git a/.buildkite/pipeline.yaml b/.buildkite/pipeline.yaml
index 84cb39ed3..90ca258af 100644
--- a/.buildkite/pipeline.yaml
+++ b/.buildkite/pipeline.yaml
@@ -290,6 +290,7 @@ steps:
   # All S/R system call tests.
   - <<: *common
     <<: *source_test
+    if: build.branch == "master"
     label: ":muscle: System call save restore tests (AMD64)"
     command: make BAZEL_OPTIONS=--test_tag_filters=save_restore syscall-tests
     parallelism: 20
@@ -297,6 +298,7 @@ steps:
       arch: "amd64"
   - <<: *common
     <<: *source_test
+    if: build.branch == "master"
     label: ":muscle: System call save restore tests (ARM64)"
     command: make BAZEL_OPTIONS=--test_tag_filters=save_restore syscall-tests
     parallelism: 10