diff --git a/tests/helpers/crypto.ts b/tests/helpers/crypto.ts
new file mode 100644
index 0000000..4c30e35
--- /dev/null
+++ b/tests/helpers/crypto.ts
@@ -0,0 +1,3 @@
+import { sha256Hex as coreSha256Hex } from '../../src/utils/crypto';
+
+export const sha256Hex = coreSha256Hex;
diff --git a/tests/helpers/dates.ts b/tests/helpers/dates.ts
new file mode 100644
index 0000000..d398469
--- /dev/null
+++ b/tests/helpers/dates.ts
@@ -0,0 +1,25 @@
+import { toIsoSqlUTC } from '../../src/utils/datetime';
+
+export function toIsoSql(d: Date = new Date()): string {
+  return toIsoSqlUTC(d);
+}
+
+export { toIsoSqlUTC };
+
+export function ymdInTZ(d: Date, tz: string = 'Europe/Madrid'): string {
+  const parts = new Intl.DateTimeFormat('en-GB', {
+    timeZone: tz,
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+  }).formatToParts(d);
+  const get = (t: string) => parts.find(p => p.type === t)?.value || '';
+  return `${get('year')}-${get('month')}-${get('day')}`;
+}
+
+export function addDaysToYMD(ymd: string, days: number, tz: string = 'Europe/Madrid'): string {
+  const [Y, M, D] = ymd.split('-').map(n => parseInt(n, 10));
+  const base = new Date(Date.UTC(Y, (M || 1) - 1, D || 1));
+  base.setUTCDate(base.getUTCDate() + days);
+  return ymdInTZ(base, tz);
+}
diff --git a/tests/helpers/queue.ts b/tests/helpers/queue.ts
new file mode 100644
index 0000000..319a3ec
--- /dev/null
+++ b/tests/helpers/queue.ts
@@ -0,0 +1,9 @@
+let simulatedQueue: any[] = [];
+
+export const SimulatedResponseQueue = {
+  async add(responses: any[]) {
+    simulatedQueue.push(...responses);
+  },
+  clear() { simulatedQueue = []; },
+  get() { return simulatedQueue; }
+};
diff --git a/tests/unit/server.test.ts b/tests/unit/server.test.ts
index 9585b2a..ea06910 100644
--- a/tests/unit/server.test.ts
+++ b/tests/unit/server.test.ts
@@ -6,23 +6,9 @@ import { GroupSyncService } from '../../src/services/group-sync';
 import { initializeDatabase, ensureUserExists } from '../../src/db';
 import { TaskService } from '../../src/tasks/service';
 
-// Simulated ResponseQueue for testing (in-memory array)
-let simulatedQueue: any[] = [];
 let originalAdd: any;
 
-class SimulatedResponseQueue {
-	static async add(responses: any[]) {
-		simulatedQueue.push(...responses);
-	}
-
-	static getQueue() {
-		return simulatedQueue;
-	}
-
-	static clear() {
-		simulatedQueue = [];
-	}
-}
+import { SimulatedResponseQueue } from '../helpers/queue';
 
 // Test database instance
 let testDb: Database;
@@ -158,7 +144,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 	});
 
 	test('should ignore empty message content', async () => {
@@ -176,7 +162,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBe(0);
+		expect(SimulatedResponseQueue.get().length).toBe(0);
 	});
 
 	test('should handle very long messages', async () => {
@@ -195,7 +181,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 	});
 
 	test('should handle messages with special characters and emojis', async () => {
@@ -214,7 +200,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 	});
 
 	test('should ignore non-/tarea commands', async () => {
@@ -232,7 +218,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBe(0);
+		expect(SimulatedResponseQueue.get().length).toBe(0);
 	});
 
 	test('should ignore message with mentions but no command', async () => {
@@ -255,7 +241,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBe(0);
+		expect(SimulatedResponseQueue.get().length).toBe(0);
 	});
 
 	test('should ignore media attachment messages', async () => {
@@ -275,7 +261,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBe(0);
+		expect(SimulatedResponseQueue.get().length).toBe(0);
 	});
 
 	test('should process command from extendedTextMessage', async () => {
@@ -295,7 +281,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 	});
 
 	test('should process command from image caption when caption starts with a command', async () => {
@@ -315,7 +301,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 	});
 
 	test('should handle requests on configured port', async () => {
@@ -373,7 +359,7 @@ describe('WebhookServer', () => {
 			await WebhookServer.handleRequest(createTestRequest(payload));
 
 			// Check that a response was queued (indicating command processing)
-			expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+			expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 		});
 
 		test('should log command with due date', async () => {
@@ -398,7 +384,7 @@ describe('WebhookServer', () => {
 			await WebhookServer.handleRequest(createTestRequest(payload));
 
 			// Verify command processing by checking queue
-			expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+			expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 		});
 	});
 
@@ -418,7 +404,7 @@ describe('WebhookServer', () => {
 		const request = createTestRequest(payload);
 		const response = await WebhookServer.handleRequest(request);
 		expect(response.status).toBe(200);
-		expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 	});
 
 	test('should handle multiple dates in command (use last one as due date)', async () => {
@@ -438,7 +424,7 @@ describe('WebhookServer', () => {
 
 		await WebhookServer.handleRequest(createTestRequest(payload));
 
-		expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 	});
 
 	test('should ignore past dates as due dates', async () => {
@@ -598,7 +584,7 @@ describe('WebhookServer', () => {
 			const request = createTestRequest(payload);
 			const response = await WebhookServer.handleRequest(request);
 			expect(response.status).toBe(200);
-			expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+			expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 
 			// Verify user was created in real database
 			const user = testDb.query("SELECT * FROM users WHERE id = ?").get('1234567890');
@@ -621,7 +607,7 @@ describe('WebhookServer', () => {
 			const request = createTestRequest(payload);
 			const response = await WebhookServer.handleRequest(request);
 			expect(response.status).toBe(200);
-			expect(SimulatedResponseQueue.getQueue().length).toBe(0);
+			expect(SimulatedResponseQueue.get().length).toBe(0);
 
 			// Verify no user was created
 			const userCount = testDb.query("SELECT COUNT(*) as count FROM users").get();
@@ -646,7 +632,7 @@ describe('WebhookServer', () => {
 			const request = createTestRequest(payload);
 			const response = await WebhookServer.handleRequest(request);
 			expect(response.status).toBe(200);
-			expect(SimulatedResponseQueue.getQueue().length).toBe(0);
+			expect(SimulatedResponseQueue.get().length).toBe(0);
 
 			// Reinitialize database for subsequent tests (force full migration)
 			testDb.exec('DROP TABLE IF EXISTS schema_migrations');
@@ -668,7 +654,7 @@ describe('WebhookServer', () => {
 			const request = createTestRequest(payload);
 			const response = await WebhookServer.handleRequest(request);
 			expect(response.status).toBe(200);
-			expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+			expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 
 			// Verify user was created/updated in database
 			const user = testDb.query("SELECT * FROM users WHERE id = ?").get('1234567890');
@@ -695,7 +681,7 @@ describe('WebhookServer', () => {
 			await WebhookServer.handleRequest(request);
 
 			// Verify that a response was queued, indicating command processing
-			expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+			expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 		});
 
 		test('should handle end-to-end flow with valid user and command processing', async () => {
@@ -720,7 +706,7 @@ describe('WebhookServer', () => {
 			expect(user).toBeDefined();
 
 			// Verify that a response was queued
-			expect(SimulatedResponseQueue.getQueue().length).toBeGreaterThan(0);
+			expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
 		});
 	});
 
@@ -800,7 +786,7 @@ describe('WebhookServer', () => {
 			const request = createTestRequest(payload);
 			await WebhookServer.handleRequest(request);
 
-			const out = SimulatedResponseQueue.getQueue();
+			const out = SimulatedResponseQueue.get();
 			expect(out.length).toBeGreaterThan(0);
 			for (const r of out) {
 				expect(r.recipient.endsWith('@g.us')).toBe(false);
@@ -848,7 +834,7 @@ describe('WebhookServer', () => {
 			const response = await WebhookServer.handleRequest(createTestRequest(payload));
 			expect(response.status).toBe(200);
 
-			const out = SimulatedResponseQueue.getQueue();
+			const out = SimulatedResponseQueue.get();
 			expect(out.length).toBeGreaterThan(0);
 			for (const r of out) {
 				expect(r.recipient.endsWith('@g.us')).toBe(false);
diff --git a/tests/unit/server/admin-approval.test.ts b/tests/unit/server/admin-approval.test.ts
index 657ccff..ada09fc 100644
--- a/tests/unit/server/admin-approval.test.ts
+++ b/tests/unit/server/admin-approval.test.ts
@@ -7,14 +7,7 @@ import { ResponseQueue } from '../../../src/services/response-queue';
 let testDb: Database;
 let originalAdd: any;
 
-let simulatedQueue: any[] = [];
-const SimulatedResponseQueue = {
-  async add(responses: any[]) {
-    simulatedQueue.push(...responses);
-  },
-  clear() { simulatedQueue = []; },
-  get() { return simulatedQueue; }
-};
+import { SimulatedResponseQueue } from '../../helpers/queue';
 
 const createTestRequest = (payload: any) =>
   new Request('http://localhost:3007', {
diff --git a/tests/unit/server/discovery-label.test.ts b/tests/unit/server/discovery-label.test.ts
index 1a1a5bf..43d4425 100644
--- a/tests/unit/server/discovery-label.test.ts
+++ b/tests/unit/server/discovery-label.test.ts
@@ -8,14 +8,7 @@ import { GroupSyncService } from '../../../src/services/group-sync';
 let testDb: Database;
 let originalAdd: any;
 
-let simulatedQueue: any[] = [];
-const SimulatedResponseQueue = {
-  async add(responses: any[]) {
-    simulatedQueue.push(...responses);
-  },
-  clear() { simulatedQueue = []; },
-  get() { return simulatedQueue; }
-};
+import { SimulatedResponseQueue } from '../../helpers/queue';
 
 const createTestRequest = (payload: any) =>
   new Request('http://localhost:3007', {
diff --git a/tests/unit/server/discovery-notify-admins.test.ts b/tests/unit/server/discovery-notify-admins.test.ts
index bbba8df..bc63caf 100644
--- a/tests/unit/server/discovery-notify-admins.test.ts
+++ b/tests/unit/server/discovery-notify-admins.test.ts
@@ -7,14 +7,7 @@ import { ResponseQueue } from '../../../src/services/response-queue';
 let testDb: Database;
 let originalAdd: any;
 
-let simulatedQueue: any[] = [];
-const SimulatedResponseQueue = {
-  async add(responses: any[]) {
-    simulatedQueue.push(...responses);
-  },
-  clear() { simulatedQueue = []; },
-  get() { return simulatedQueue; }
-};
+import { SimulatedResponseQueue } from '../../helpers/queue';
 
 const createTestRequest = (payload: any) =>
   new Request('http://localhost:3007', {
diff --git a/tests/unit/server/enforce-gating.test.ts b/tests/unit/server/enforce-gating.test.ts
index d4341cf..28f2a76 100644
--- a/tests/unit/server/enforce-gating.test.ts
+++ b/tests/unit/server/enforce-gating.test.ts
@@ -9,14 +9,7 @@ import { GroupSyncService } from '../../../src/services/group-sync';
 let testDb: Database;
 let originalAdd: any;
 
-let simulatedQueue: any[] = [];
-const SimulatedResponseQueue = {
-  async add(responses: any[]) {
-    simulatedQueue.push(...responses);
-  },
-  clear() { simulatedQueue = []; },
-  get() { return simulatedQueue; }
-};
+import { SimulatedResponseQueue } from '../../helpers/queue';
 
 const createTestRequest = (payload: any) =>
   new Request('http://localhost:3007', {
diff --git a/tests/unit/server/unknown-group-discovery.test.ts b/tests/unit/server/unknown-group-discovery.test.ts
index 6763b46..f4c6f1e 100644
--- a/tests/unit/server/unknown-group-discovery.test.ts
+++ b/tests/unit/server/unknown-group-discovery.test.ts
@@ -7,14 +7,7 @@ import { ResponseQueue } from '../../../src/services/response-queue';
 let testDb: Database;
 let originalAdd: any;
 
-let simulatedQueue: any[] = [];
-const SimulatedResponseQueue = {
-  async add(responses: any[]) {
-    simulatedQueue.push(...responses);
-  },
-  clear() { simulatedQueue = []; },
-  get() { return simulatedQueue; }
-};
+import { SimulatedResponseQueue } from '../../helpers/queue';
 
 const createTestRequest = (payload: any) =>
   new Request('http://localhost:3007', {
diff --git a/tests/unit/services/cleanup-inactive.test.ts b/tests/unit/services/cleanup-inactive.test.ts
index 1ab8aca..c395523 100644
--- a/tests/unit/services/cleanup-inactive.test.ts
+++ b/tests/unit/services/cleanup-inactive.test.ts
@@ -3,9 +3,7 @@ import { Database } from 'bun:sqlite';
 import { initializeDatabase } from '../../../src/db';
 import { MaintenanceService } from '../../../src/services/maintenance';
 
-function toIso(d: Date): string {
-  return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { toIsoSql as toIso } from '../../helpers/dates';
 
 const envBackup = { ...process.env };
 let memdb: Database;
diff --git a/tests/unit/services/command.date-parsing.test.ts b/tests/unit/services/command.date-parsing.test.ts
index 2f835cc..d180818 100644
--- a/tests/unit/services/command.date-parsing.test.ts
+++ b/tests/unit/services/command.date-parsing.test.ts
@@ -4,23 +4,8 @@ import { initializeDatabase } from '../../../src/db';
 import { TaskService } from '../../../src/tasks/service';
 import { CommandService } from '../../../src/services/command';
 
-function ymdInTZ(d: Date, tz: string = 'Europe/Madrid'): string {
-  const parts = new Intl.DateTimeFormat('en-GB', {
-    timeZone: tz,
-    year: 'numeric',
-    month: '2-digit',
-    day: '2-digit',
-  }).formatToParts(d);
-  const get = (t: string) => parts.find(p => p.type === t)?.value || '';
-  return `${get('year')}-${get('month')}-${get('day')}`;
-}
-
-function addDaysToYMD(ymd: string, days: number, tz: string = 'Europe/Madrid'): string {
-  const [Y, M, D] = ymd.split('-').map(n => parseInt(n, 10));
-  const base = new Date(Date.UTC(Y, (M || 1) - 1, D || 1));
-  base.setUTCDate(base.getUTCDate() + days);
-  return ymdInTZ(base, tz);
-}
+import { ymdInTZ, addDaysToYMD } from '../../helpers/dates';
+
 
 describe('CommandService - parser de fechas (hoy/mañana y formatos YYYY/YY-MM-DD)', () => {
   let memdb: Database;
diff --git a/tests/unit/services/metrics-health.test.ts b/tests/unit/services/metrics-health.test.ts
index f13e169..97425b7 100644
--- a/tests/unit/services/metrics-health.test.ts
+++ b/tests/unit/services/metrics-health.test.ts
@@ -4,9 +4,7 @@ import { Metrics } from '../../../src/services/metrics';
 import { initializeDatabase } from '../../../src/db';
 import { Database } from 'bun:sqlite';
 
-function toIso(d: Date): string {
-  return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { toIsoSql as toIso } from '../../helpers/dates';
 
 const envBackup = { ...process.env };
 let memdb: Database;
diff --git a/tests/unit/services/response-queue.cleanup.test.ts b/tests/unit/services/response-queue.cleanup.test.ts
index 2d778d4..faa088f 100644
--- a/tests/unit/services/response-queue.cleanup.test.ts
+++ b/tests/unit/services/response-queue.cleanup.test.ts
@@ -6,9 +6,7 @@ import { ResponseQueue } from '../../../src/services/response-queue';
 let testDb: Database;
 let originalDbInstance: Database;
 
-function toIso(dt: Date): string {
-  return dt.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { toIsoSql as toIso } from '../../helpers/dates';
 
 describe('ResponseQueue cleanup/retention', () => {
   beforeAll(() => {
diff --git a/tests/unit/tasks/complete-reaction.test.ts b/tests/unit/tasks/complete-reaction.test.ts
index a891b59..2158dfe 100644
--- a/tests/unit/tasks/complete-reaction.test.ts
+++ b/tests/unit/tasks/complete-reaction.test.ts
@@ -5,9 +5,7 @@ import { TaskService } from '../../../src/tasks/service';
 import { ResponseQueue } from '../../../src/services/response-queue';
 import { AllowedGroups } from '../../../src/services/allowed-groups';
 
-function toIsoSql(d: Date): string {
-  return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { toIsoSql } from '../../helpers/dates';
 
 describe('TaskService - reacción ✅ al completar (Fase 2)', () => {
   let memdb: Database;
diff --git a/tests/web/api.integrations.feeds.test.ts b/tests/web/api.integrations.feeds.test.ts
index a3dc156..4422696 100644
--- a/tests/web/api.integrations.feeds.test.ts
+++ b/tests/web/api.integrations.feeds.test.ts
@@ -3,18 +3,9 @@ import Database from 'bun:sqlite';
 import { startWebServer } from './helpers/server';
 import { createTempDb } from './helpers/db';
 
-async function sha256Hex(input: string): Promise<string> {
-  const enc = new TextEncoder().encode(input);
-  const buf = await crypto.subtle.digest('SHA-256', enc);
-  const bytes = new Uint8Array(buf);
-  return Array.from(bytes)
-    .map((b) => b.toString(16).padStart(2, '0'))
-    .join('');
-}
-
-function toIsoSql(d = new Date()): string {
-  return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { sha256Hex } from '../helpers/crypto';
+
+import { toIsoSql } from '../helpers/dates';
 
 describe('API - /api/integrations/feeds', () => {
   const PORT = 19123;
diff --git a/tests/web/api.me.preferences.test.ts b/tests/web/api.me.preferences.test.ts
index 29356d7..d6c39ed 100644
--- a/tests/web/api.me.preferences.test.ts
+++ b/tests/web/api.me.preferences.test.ts
@@ -6,18 +6,9 @@ import { join } from 'path';
 import { startWebServer } from './helpers/server';
 import { initializeDatabase, ensureUserExists } from '../../src/db';
 
-async function sha256Hex(input: string): Promise<string> {
-	const enc = new TextEncoder().encode(input);
-	const buf = await crypto.subtle.digest('SHA-256', enc);
-	const bytes = new Uint8Array(buf);
-	return Array.from(bytes)
-		.map((b) => b.toString(16).padStart(2, '0'))
-		.join('');
-}
-
-function toIsoSql(d = new Date()): string {
-	return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { sha256Hex } from '../helpers/crypto';
+
+import { toIsoSql } from '../helpers/dates';
 
 describe('Web API - GET /api/me/preferences', () => {
 	const userId = '34600123456';
diff --git a/tests/web/api.me.tasks.test.ts b/tests/web/api.me.tasks.test.ts
index a36b405..9301130 100644
--- a/tests/web/api.me.tasks.test.ts
+++ b/tests/web/api.me.tasks.test.ts
@@ -6,18 +6,9 @@ import { join } from 'path';
 import { startWebServer } from './helpers/server';
 import { initializeDatabase, ensureUserExists } from '../../src/db';
 
-async function sha256Hex(input: string): Promise<string> {
-	const enc = new TextEncoder().encode(input);
-	const buf = await crypto.subtle.digest('SHA-256', enc);
-	const bytes = new Uint8Array(buf);
-	return Array.from(bytes)
-		.map((b) => b.toString(16).padStart(2, '0'))
-		.join('');
-}
-
-function toIsoSql(d = new Date()): string {
-	return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { sha256Hex } from '../helpers/crypto';
+
+import { toIsoSql } from '../helpers/dates';
 
 describe('Web API - GET /api/me/tasks', () => {
 	const USER = '34600123456';
diff --git a/tests/web/api.tasks.complete.reaction.test.ts b/tests/web/api.tasks.complete.reaction.test.ts
index 1357aad..19bbba5 100644
--- a/tests/web/api.tasks.complete.reaction.test.ts
+++ b/tests/web/api.tasks.complete.reaction.test.ts
@@ -2,9 +2,7 @@ import { beforeEach, afterEach, describe, expect, it } from 'bun:test';
 import { createTempDb } from './helpers/db';
 // Los imports del handler y closeDb se hacen dinámicos dentro de cada test/teardown
 
-function toIsoSql(d: Date): string {
-  return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { toIsoSql } from '../helpers/dates';
 
 describe('Web API - completar tarea encola reacción ✅', () => {
   let cleanup: () => void;
diff --git a/tests/web/app.integrations.page.test.ts b/tests/web/app.integrations.page.test.ts
index 443663b..cc783c6 100644
--- a/tests/web/app.integrations.page.test.ts
+++ b/tests/web/app.integrations.page.test.ts
@@ -3,18 +3,9 @@ import Database from 'bun:sqlite';
 import { startWebServer } from './helpers/server';
 import { createTempDb } from './helpers/db';
 
-async function sha256Hex(input: string): Promise<string> {
-  const enc = new TextEncoder().encode(input);
-  const buf = await crypto.subtle.digest('SHA-256', enc);
-  const bytes = new Uint8Array(buf);
-  return Array.from(bytes)
-    .map((b) => b.toString(16).padStart(2, '0'))
-    .join('');
-}
+import { sha256Hex } from '../helpers/crypto';
 
-function toIsoSql(d = new Date()): string {
-  return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { toIsoSql } from '../helpers/dates';
 
 describe('Web page - /app/integrations', () => {
   const PORT = 19124;
diff --git a/tests/web/app.preferences.page.test.ts b/tests/web/app.preferences.page.test.ts
index 28d8cd4..ede4fb3 100644
--- a/tests/web/app.preferences.page.test.ts
+++ b/tests/web/app.preferences.page.test.ts
@@ -6,18 +6,9 @@ import { join } from 'path';
 import { startWebServer } from './helpers/server';
 import { initializeDatabase, ensureUserExists } from '../../src/db';
 
-async function sha256Hex(input: string): Promise<string> {
-	const enc = new TextEncoder().encode(input);
-	const buf = await crypto.subtle.digest('SHA-256', enc);
-	const bytes = new Uint8Array(buf);
-	return Array.from(bytes)
-		.map((b) => b.toString(16).padStart(2, '0'))
-		.join('');
-}
+import { sha256Hex } from '../helpers/crypto';
 
-function toIsoSql(d = new Date()): string {
-	return d.toISOString().replace('T', ' ').replace('Z', '');
-}
+import { toIsoSql } from '../helpers/dates';
 
 describe('Web UI - /app/preferences', () => {
 	const userId = '34600123456';