diff --git a/packages/server/src/rpc/TeamService.test.ts b/packages/server/src/rpc/TeamService.test.ts
index 03a43cb..636bdec 100644
--- a/packages/server/src/rpc/TeamService.test.ts
+++ b/packages/server/src/rpc/TeamService.test.ts
@@ -78,7 +78,7 @@ describe('team', () => {
       const client = getClient()
       const team = await client.create({name: 'test'})
       const teamId = team.id
-      const {userId} = await test.registerAccount('test2@user.com')
+      const {userId} = await test.registerAccount(test.createTestUsername(2))
       await client.addUser({userId, teamId, roleId: 1})
     })
   })
@@ -88,7 +88,7 @@ describe('team', () => {
       const client = getClient()
       const team = await client.create({name: 'test'})
       const teamId = team.id
-      const {userId} = await test.registerAccount('test2@user.com')
+      const {userId} = await test.registerAccount(test.createTestUsername(2))
       await client.addUser({userId, teamId, roleId: 1})
       await client.removeUser({userId, teamId, roleId: 1})
     })
@@ -99,7 +99,7 @@ describe('team', () => {
       const client = getClient()
       const team = await client.create({name: 'test'})
       const teamId = team.id
-      const {userId} = await test.registerAccount('test2@user.com')
+      const {userId} = await test.registerAccount(test.createTestUsername(2))
       await client.addUser({userId, teamId, roleId: 1})
       const {usersInTeam} = await client.findUsers(teamId)
       expect(usersInTeam.length).toBe(2)
diff --git a/packages/server/src/test-utils/TestUtils.ts b/packages/server/src/test-utils/TestUtils.ts
index 56d5cc0..a1786d1 100644
--- a/packages/server/src/test-utils/TestUtils.ts
+++ b/packages/server/src/test-utils/TestUtils.ts
@@ -16,7 +16,7 @@ import {Server} from 'http'
 import { IAppServer } from '../application/IAppServer'
 
 export class TestUtils<T extends IRoutes> {
-  readonly username = `test${process.env.JEST_WORKER_ID}@user.com`
+  readonly username = this.createTestUsername()
   readonly password = 'Password10'
 
   readonly app: IAppServer
@@ -29,6 +29,10 @@ export class TestUtils<T extends IRoutes> {
     this.transactionManager = this.bootstrap.database.transactionManager
   }
 
+  createTestUsername(id = 1) {
+    return `test${process.env.JEST_WORKER_ID}_${id}@user.com`
+  }
+
   /**
    * Set up beforeEach and afterEach cases for jest tests. Helps create and
    * execute the tests in transaction, and rolls it back in the end.