diff --git a/server/tests/models/models.test.js b/server/tests/models/models.test.js
index ae4ebd4..597f05e 100644
--- a/server/tests/models/models.test.js
+++ b/server/tests/models/models.test.js
@@ -64,16 +64,17 @@ describe('Models', () => {
       const tenant1 = await createTestTenant({ slug: 'tenant1' });
       const tenant2 = await createTestTenant({ slug: 'tenant2' });
 
+      const timestamp = Date.now();
       const user1 = await models.User.create({
         username: 'testuser',
-        email: 'test1@example.com',
+        email: `test1-${timestamp}@example.com`,
         password_hash: 'hashedpassword',
         tenant_id: tenant1.id
       });
 
       const user2 = await models.User.create({
         username: 'testuser',
-        email: 'test2@example.com',
+        email: `test2-${timestamp}@example.com`,
         password_hash: 'hashedpassword',
         tenant_id: tenant2.id
       });