diff --git a/test/schema-version-migration.test.ts b/test/schema-version-migration.test.ts
index af6734477..2cb9e1a82 100644
--- a/test/schema-version-migration.test.ts
+++ b/test/schema-version-migration.test.ts
@@ -10,6 +10,12 @@
  */
 
 import { describe, test, expect, beforeEach, afterEach } from 'bun:test';
+
+// Per-test timeout: schema-mismatch path triggers a full-scope rebuild, which
+// fans out to refreshEntity for each of 7 per-project entities. Each refresh
+// shells out to gbrain with a 10s internal timeout. Total worst case ~70s.
+// We allow 60s here to give the test room without flaking on a slow brain.
+const SLOW_TIMEOUT = 60_000;
 import { mkdtempSync, existsSync, writeFileSync, readFileSync, rmSync, mkdirSync } from 'fs';
 import { join } from 'path';
 import { tmpdir } from 'os';
@@ -35,7 +41,7 @@ async function importCache(): Promise<typeof import('../bin/gstack-brain-cache')
 }
 
 describe('schema-version cache migration (D4 A4)', () => {
-  test('cache file with mismatched schema_version triggers wipe-and-rebuild attempt', async () => {
+  test('cache file with mismatched schema_version triggers wipe-and-rebuild attempt', { timeout: SLOW_TIMEOUT }, async () => {
     const mod = await importCache();
     const cacheDir = join(TMP_HOME, 'projects', 'helsinki', 'brain-cache');
     mkdirSync(cacheDir, { recursive: true });
@@ -51,7 +57,7 @@ describe('schema-version cache migration (D4 A4)', () => {
     // cmdGet should detect schema mismatch and try to rebuild. Since brain is
     // unreachable in the test env, the rebuild fails and the stale file is
     // gone (wiped during the rebuild attempt).
-    mod.cmdGet('product', 'helsinki');
+    mod.cmdGet('product', 'helsinki'); // triggers wipe-and-rebuild attempt
 
     // After rebuild attempt with unreachable brain, the stale file is wiped
     // and _meta.json shows the current schema_version.
@@ -60,7 +66,7 @@ describe('schema-version cache migration (D4 A4)', () => {
     expect(newMeta.schema_version).toBe(GSTACK_SCHEMA_PACK_VERSION);
   });
 
-  test('matching schema_version + fresh TTL is warm hit (no rebuild)', async () => {
+  test('matching schema_version + fresh TTL is warm hit (no rebuild)', { timeout: SLOW_TIMEOUT }, async () => {
     const mod = await importCache();
     const cacheDir = join(TMP_HOME, 'projects', 'helsinki', 'brain-cache');
     mkdirSync(cacheDir, { recursive: true });
@@ -78,7 +84,7 @@ describe('schema-version cache migration (D4 A4)', () => {
     expect(readFileSync(result.path, 'utf-8')).toBe('# fresh content\n');
   });
 
-  test('rebuild wipes ALL files in scope, not just the one being read', async () => {
+  test('rebuild wipes ALL files in scope, not just the one being read', { timeout: SLOW_TIMEOUT }, async () => {
     const mod = await importCache();
     const cacheDir = join(TMP_HOME, 'projects', 'helsinki', 'brain-cache');
     mkdirSync(cacheDir, { recursive: true });
@@ -92,7 +98,7 @@ describe('schema-version cache migration (D4 A4)', () => {
       last_attempt: {},
     }));
 
-    mod.cmdGet('product', 'helsinki');
+    mod.cmdGet('product', 'helsinki'); // triggers wipe-and-rebuild attempt
 
     // All per-project files wiped (rebuild attempt cleared the scope)
     expect(existsSync(join(cacheDir, 'product.md'))).toBe(false);