diff --git a/src/lib/ai/create.test.ts b/src/lib/ai/create.test.ts
index 82c28f49..9cbc5099 100644
--- a/src/lib/ai/create.test.ts
+++ b/src/lib/ai/create.test.ts
@@ -26,7 +26,7 @@ describe('lib ai', () => {
 
             it('should return an error if creating the AI execution fails', async () => {
                 const expectedError = new Error('Ups');
-                prisma.aiExecution.create = vi.fn().mockRejectedValue(expectedError);
+                vi.spyOn(prisma.aiExecution, 'create').mockRejectedValueOnce(expectedError);
 
                 await expect(createAiExecution(execution)).rejects.toThrowError(expectedError);
             });
diff --git a/src/lib/meetings/get.test.ts b/src/lib/meetings/get.test.ts
index 4329595d..1349f8bf 100644
--- a/src/lib/meetings/get.test.ts
+++ b/src/lib/meetings/get.test.ts
@@ -1,15 +1,16 @@
-import { beforeEach, describe, expect, test, vi } from 'vitest';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
 
 import { calculateNextMeeting } from './get';
 import { Meeting, MeetingDescription, Rythm } from './types';
 
 describe('calculateNextMeeting', () => {
     const fakeCurrentDate = new Date(2023, 0, 1);
+
     beforeEach(() => {
         vi.useFakeTimers({ now: fakeCurrentDate });
     });
 
-    test('returns the closest next meeting', async () => {
+    it('should return the closest next meeting', async () => {
         const meetingDescriptions: MeetingDescription[] = [
             {
                 startDate: new Date('2023-01-01T23:00:00.000Z'),
@@ -35,7 +36,7 @@ describe('calculateNextMeeting', () => {
         expect(result).toEqual(expectedResult);
     });
 
-    test('returns the closest next meeting also when they are started in the past', async () => {
+    it('should return the closest next meeting also when they are started in the past', async () => {
         const meetingDescriptions: MeetingDescription[] = [
             {
                 startDate: new Date('2022-12-28T11:00:00.000Z'),
@@ -61,7 +62,7 @@ describe('calculateNextMeeting', () => {
         expect(result).toEqual(expectedResult);
     });
 
-    test('returns null when no next meeting is found', async () => {
+    it('should return null when no next meeting is found', async () => {
         const result = calculateNextMeeting([]);
         expect(result).toBeNull();
     });
diff --git a/src/lib/notifications/persistent/create.test.ts b/src/lib/notifications/persistent/create.test.ts
new file mode 100644
index 00000000..0fc2458f
--- /dev/null
+++ b/src/lib/notifications/persistent/create.test.ts
@@ -0,0 +1,97 @@
+import { NotificationType } from '@prisma/client';
+import { revalidatePath } from 'next/cache';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+import prisma from '@/lib/prisma/client';
+
+import { createNotification, createNotificationAction } from './create';
+import { getNotifications } from './get';
+
+vi.mock('../../auth/session', async () => ({
+    getServerSession: vi.fn().mockResolvedValue({ user: { id: 'userId' } })
+}));
+
+vi.mock('next/cache', () => ({
+    revalidatePath: vi.fn()
+}));
+
+describe('lib notifications', () => {
+    describe('persistent create', () => {
+        const notification = {
+            title: 'title',
+            type: NotificationType.SignupWelcome,
+            payload: {}
+        };
+
+        const userId = 'userId';
+
+        beforeEach(() => {
+            prisma.notification.deleteMany({});
+        });
+
+        describe('createNotification', () => {
+            it('should create a notification', async () => {
+                // eslint-disable-next-line @typescript-eslint/no-unused-vars
+                const { ownerId, ...createdNotification } = await createNotification(userId, notification);
+                const retrievedNotification = (await getNotifications({ userId }))[0];
+
+                expect(retrievedNotification).toStrictEqual(createdNotification);
+            });
+
+            it('should create a notification with a default payload if none is provided', async () => {
+                const createdNotification = await createNotification(userId, { ...notification, payload: undefined });
+
+                expect(createdNotification.payload).toStrictEqual({});
+            });
+
+            it('should return an error if creating the notification fails', async () => {
+                const expectedError = new Error('Ups');
+                vi.spyOn(prisma.notification, 'create').mockRejectedValueOnce(expectedError);
+
+                await expect(createNotification(userId, notification)).rejects.toThrowError(expectedError);
+            });
+        });
+
+        describe('createNotificationAction', () => {
+            it('should create a notification and return its id', async () => {
+                const id = await createNotificationAction(notification);
+                const retrievedNotification = await getNotifications({ userId });
+
+                expect(retrievedNotification[0].id).toBe(id);
+            });
+
+            it('should revalidate the notifications path after creating the notification', async () => {
+                await createNotificationAction(notification);
+                expect(revalidatePath).toHaveBeenCalledWith('/notifications');
+            });
+
+            it('should return an error if creating the notification fails', async () => {
+                const expectedError = new Error('Ups');
+                vi.spyOn(prisma.notification, 'create').mockRejectedValueOnce(expectedError);
+
+                await expect(createNotificationAction(notification)).rejects.toThrowError(expectedError);
+            });
+
+            describe('validations', () => {
+                it('should return a validation error if the title is not a string', async () => {
+                    const expectedError = new Error('Validation error: Expected string, received number at "title"');
+                    await expect(createNotificationAction({ ...notification, title: (1 as any) })).rejects.toThrowError(expectedError);
+                });
+
+                it('should return a validation error if the payload is not an object', async () => {
+                    const expectedError = new Error('Validation error: Expected object, received string at "payload"');
+                    await expect(createNotificationAction({ ...notification, payload: ('nope' as any) })).rejects.toThrowError(expectedError);
+                });
+
+                it('should return a validation error if the type is not a NotificationType', async () => {
+                    try {
+                        await createNotificationAction({ ...notification, type: ('nope' as any) });
+                    } catch (error: any) {
+                        expect(error.message).toContain('Validation error: Invalid enum value');
+                        expect(error.message).toContain('received \'nope\' at "type"');
+                    }
+                });
+            });
+        });
+    });
+});