diff --git a/web/src/data/demoSeedIds.test.ts b/web/src/data/demoSeedIds.test.ts
index 04139462..1f6d0136 100644
--- a/web/src/data/demoSeedIds.test.ts
+++ b/web/src/data/demoSeedIds.test.ts
@@ -1,29 +1,28 @@
-import { describe, expect, it } from 'vitest';
+import test from 'node:test';
+import assert from 'node:assert/strict';
 import {
   isDemoSeedDocId,
   isDemoSeedProjectId,
   isTenProjectsSeedDocId,
 } from './demoSeedIds';
 
-describe('demoSeedIds', () => {
-  it('detects legacy mock and neuropulse/ten-projects ids', () => {
-    expect(isDemoSeedDocId('doc-001')).toBe(true);
-    expect(isDemoSeedDocId('doc-shared-001')).toBe(true);
-    expect(isDemoSeedDocId('doc-private-002')).toBe(true);
-    expect(isDemoSeedDocId('doc-cusa-intake')).toBe(true);
-    expect(isDemoSeedDocId('doc-neuropulse-feasibility_reg')).toBe(true);
-    expect(isTenProjectsSeedDocId('doc-proj6001-urs')).toBe(true);
-    expect(isDemoSeedDocId('doc-proj6010-test_manager')).toBe(true);
-    expect(isDemoSeedDocId('doc_proj56_intake')).toBe(false);
-    expect(isDemoSeedDocId('doc-p12-intake')).toBe(false);
-    expect(isDemoSeedDocId('doc-free-abc')).toBe(false);
-  });
+test('detects legacy mock and neuropulse/ten-projects ids', () => {
+  assert.equal(isDemoSeedDocId('doc-001'), true);
+  assert.equal(isDemoSeedDocId('doc-shared-001'), true);
+  assert.equal(isDemoSeedDocId('doc-private-002'), true);
+  assert.equal(isDemoSeedDocId('doc-cusa-intake'), true);
+  assert.equal(isDemoSeedDocId('doc-neuropulse-feasibility_reg'), true);
+  assert.equal(isTenProjectsSeedDocId('doc-proj6001-urs'), true);
+  assert.equal(isDemoSeedDocId('doc-proj6010-test_manager'), true);
+  assert.equal(isDemoSeedDocId('doc_proj56_intake'), false);
+  assert.equal(isDemoSeedDocId('doc-p12-intake'), false);
+  assert.equal(isDemoSeedDocId('doc-free-abc'), false);
+});
 
-  it('detects colliding demo project ids', () => {
-    expect(isDemoSeedProjectId(1)).toBe(true);
-    expect(isDemoSeedProjectId(5201)).toBe(true);
-    expect(isDemoSeedProjectId(6005)).toBe(true);
-    expect(isDemoSeedProjectId(56)).toBe(false);
-    expect(isDemoSeedProjectId(6275)).toBe(false);
-  });
+test('detects colliding demo project ids', () => {
+  assert.equal(isDemoSeedProjectId(1), true);
+  assert.equal(isDemoSeedProjectId(5201), true);
+  assert.equal(isDemoSeedProjectId(6005), true);
+  assert.equal(isDemoSeedProjectId(56), false);
+  assert.equal(isDemoSeedProjectId(6275), false);
 });
diff --git a/web/vite.config.ts b/web/vite.config.ts
index b19ccb52..0145ecdd 100644
--- a/web/vite.config.ts
+++ b/web/vite.config.ts
@@ -20,7 +20,8 @@ export default defineConfig({
   },
   // @ts-expect-error vitest config field
   test: {
-    include: ['src/components/chat/**/*.test.ts', 'src/data/**/*.test.ts', 'src/lib/**/*.test.ts'],
+    // Only vitest-style suites (tsx/node:test covers the rest via npm test).
+    include: ['src/components/chat/**/*.test.ts'],
   },
   server: {
     host: '0.0.0.0',