diff --git a/src/api/private/auth/auth.controller.ts b/src/api/private/auth/auth.controller.ts
index 334a1d29b..b2f0b3bc7 100644
--- a/src/api/private/auth/auth.controller.ts
+++ b/src/api/private/auth/auth.controller.ts
@@ -6,6 +6,7 @@
 import {
   BadRequestException,
   Body,
+  ConflictException,
   Controller,
   Delete,
   NotFoundException,
@@ -56,7 +57,7 @@ export class AuthController {
       return;
     } catch (e) {
       if (e instanceof AlreadyInDBError) {
-        throw new BadRequestException(e.message);
+        throw new ConflictException(e.message);
       }
       throw e;
     }
diff --git a/test/private-api/auth.e2e-spec.ts b/test/private-api/auth.e2e-spec.ts
index 7df133331..c1976f219 100644
--- a/test/private-api/auth.e2e-spec.ts
+++ b/test/private-api/auth.e2e-spec.ts
@@ -75,7 +75,7 @@ describe('Auth', () => {
           .post('/api/private/auth/local')
           .set('Content-Type', 'application/json')
           .send(JSON.stringify(registrationDto))
-          .expect(400);
+          .expect(409);
       });
       it('when registration is disabled', async () => {
         testSetup.configService.get('authConfig').local.enableRegister = false;