diff --git a/vitest.config.ts b/vitest.config.ts
index 9402ccf3..582c5aa5 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -12,6 +12,13 @@ export default defineConfig({
     environment: "node",
     globals: true,
     passWithNoTests: true,
+    // 15s (up from the 5s default). Full-suite parallel runs occasionally
+    // starve single tests on slower hosts — most notably the CPU-heavy
+    // eslint rule tests and React Testing Library mounts. Keeps per-test
+    // timeouts long enough to absorb contention while still catching
+    // genuine hangs. Individual tests can still override via `it(..., fn, ms)`.
+    testTimeout: 15000,
+    hookTimeout: 15000,
     include: ["src/**/*.test.ts", "src/**/*.test.tsx", "tests/**/*.test.ts", "tests/**/*.test.tsx"],
     coverage: {
       provider: "v8",