diff --git a/vitest.config.ts b/vitest.config.ts
index 0f19a9b4e..886ca5402 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -1,12 +1,10 @@
 import path from "node:path";
-import os from "node:os";
 import { fileURLToPath } from "node:url";
 import { defineConfig } from "vitest/config";
 
 const repoRoot = path.dirname(fileURLToPath(import.meta.url));
 const isCI = process.env.CI === "true" || process.env.GITHUB_ACTIONS === "true";
-const cpuCount = os.cpus().length;
-const localWorkers = Math.min(16, Math.max(4, Math.floor(cpuCount * 0.5)));
+const localWorkers = 4;
 
 export default defineConfig({
   resolve: {