diff --git a/sdk/vitest.config.ts b/sdk/vitest.config.ts
index efa710b6..c10f2ad4 100644
--- a/sdk/vitest.config.ts
+++ b/sdk/vitest.config.ts
@@ -5,5 +5,16 @@ export default defineConfig({
     environment: 'node',
     include: ['tests/**/*.test.ts'],
     globals: false,
+    // vitest defaults to 5s per test. That is fine on a laptop and too tight in
+    // a cloud sandbox: run ae982aaa reported 22 failed / 166 passed, almost all
+    // of them 'Test timed out in 5000ms', while the same commit runs 188/188
+    // clean locally. Those phantom failures are expensive — they fail verify,
+    // which marks the run VERIFY_FAIL_NONFATAL, and it then commits and opens a
+    // PR carrying work that is actually fine but labelled broken.
+    //
+    // 30s is still short enough to catch a genuine hang. Cases that legitimately
+    // need longer already declare it themselves (live-kernel uses 45s).
+    testTimeout: 30_000,
+    hookTimeout: 30_000,
   },
 });