diff --git a/packages/hoppscotch-backend/src/user/user.service.spec.ts b/packages/hoppscotch-backend/src/user/user.service.spec.ts
new file mode 100644
index 000000000..e5f293519
--- /dev/null
+++ b/packages/hoppscotch-backend/src/user/user.service.spec.ts
@@ -0,0 +1,53 @@
+import { DeepMockProxy, mockDeep, mockReset } from 'jest-mock-extended';
+import { PrismaService } from 'src/prisma/prisma.service';
+import { PubSubService } from 'src/pubsub/pubsub.service';
+import { UserService } from './user.service';
+
+const mockPrisma = mockDeep<PrismaService>();
+const mockPubSub = mockDeep<PubSubService>();
+
+// @ts-ignore
+const userService = new UserService(mockPrisma, mockPubSub as any);
+
+const user = {
+  uid: '123',
+  displayName: 'John Doe',
+  email: 'test@hoppscotch.io',
+  photoURL: 'https://example.com/avatar.png',
+  currentRESTSession: JSON.stringify({}),
+  currentGQLSession: JSON.stringify({}),
+};
+
+beforeEach(() => {
+  mockReset(mockPrisma);
+  mockPubSub.publish.mockClear();
+});
+
+describe('UserService', () => {
+  describe('updateUser', () => {
+    test('should update user', async () => {
+      mockPrisma.user.update.mockResolvedValue(user);
+
+      const result = await userService.updateUser(user, {
+        currentGQLSession: user.currentGQLSession,
+        currentRESTSession: user.currentRESTSession,
+      });
+
+      expect(result).toEqualRight(user);
+    });
+    test('should publish user update subscription', async () => {
+      mockPrisma.user.update.mockResolvedValue(user);
+
+      await userService.updateUser(user, {
+        currentGQLSession: user.currentGQLSession,
+        currentRESTSession: user.currentRESTSession,
+      });
+
+      expect(mockPubSub.publish).toHaveBeenCalledTimes(1);
+      expect(mockPubSub.publish).toHaveBeenCalledWith(
+        `user/${user.uid}/updated`,
+        user,
+      );
+    });
+  });
+});