diff --git a/.buildkite/ci.mjs b/.buildkite/ci.mjs
index 007b35c306..a9fe144bdb 100755
--- a/.buildkite/ci.mjs
+++ b/.buildkite/ci.mjs
@@ -588,7 +588,7 @@ function getTestBunStep(platform, options, testOptions = {}) {
     agents: getTestAgent(platform, options),
     retry: getRetry(),
     cancel_on_build_failing: isMergeQueue(),
-    parallelism: os === "darwin" ? 2 : 10,
+    parallelism: os === "darwin" ? 2 : 20,
     timeout_in_minutes: profile === "asan" || os === "windows" ? 45 : 30,
     env: {
       ASAN_OPTIONS: "allow_user_segv_handler=1:disable_coredump=0:detect_leaks=0",