diff --git a/src/v1/account-removal/account-removal.controller.ts b/src/v1/account-removal/account-removal.controller.ts
index 9fca442..ae5e51f 100644
--- a/src/v1/account-removal/account-removal.controller.ts
+++ b/src/v1/account-removal/account-removal.controller.ts
@@ -21,9 +21,7 @@ import { RequestAccountRemovalDto } from './dto/request-account-removal.dto';
 @ApiTags('account-removal')
 @Controller({ path: 'account-removal', version: '1' })
 export class AccountRemovalController {
-  constructor(
-    private readonly accountRemovalService: AccountRemovalService,
-  ) {}
+  constructor(private readonly accountRemovalService: AccountRemovalService) {}
 
   @Throttle({ default: { ttl: 60_000, limit: 10 } })
   @Get('challenge')
@@ -38,8 +36,7 @@ export class AccountRemovalController {
   @Post('request')
   @HttpCode(HttpStatus.ACCEPTED)
   @ApiOperation({
-    summary:
-      'Submit an account removal request (public; emails the operators)',
+    summary: 'Submit an account removal request (public; emails the operators)',
   })
   async submitRequest(
     @Body() body: RequestAccountRemovalDto,
diff --git a/src/v1/account-removal/account-removal.service.spec.ts b/src/v1/account-removal/account-removal.service.spec.ts
index ceb2b27..f2cdb63 100644
--- a/src/v1/account-removal/account-removal.service.spec.ts
+++ b/src/v1/account-removal/account-removal.service.spec.ts
@@ -5,7 +5,7 @@ import {
 import type { ConfigService } from '@nestjs/config';
 import { AccountRemovalService } from './account-removal.service';
 
-const sendMailMock = jest.fn();
+const sendMailMock = jest.fn((_mail: unknown) => Promise.resolve());
 
 jest.mock('nodemailer', () => ({
   createTransport: jest.fn(() => ({ sendMail: sendMailMock })),
@@ -43,7 +43,9 @@ describe('AccountRemovalService', () => {
       expect(Number.isInteger(a)).toBe(true);
       expect(Number.isInteger(b)).toBe(true);
 
-      expect(() => service.verifyChallenge(a + b, challenge.token)).not.toThrow();
+      expect(() =>
+        service.verifyChallenge(a + b, challenge.token),
+      ).not.toThrow();
     });
 
     it('rejects a wrong answer', () => {
diff --git a/src/v1/account-removal/account-removal.service.ts b/src/v1/account-removal/account-removal.service.ts
index 8661dfd..b459d13 100644
--- a/src/v1/account-removal/account-removal.service.ts
+++ b/src/v1/account-removal/account-removal.service.ts
@@ -1,8 +1,4 @@
-import {
-  createHmac,
-  randomInt,
-  timingSafeEqual,
-} from 'crypto';
+import { createHmac, randomInt, timingSafeEqual } from 'crypto';
 import {
   BadRequestException,
   Injectable,
@@ -137,9 +133,7 @@ export class AccountRemovalService {
     const user = this.configService.get<string>('SMTP_USER');
     const pass = this.configService.get<string>('SMTP_PASS');
     if (!host || !user || !pass) {
-      throw new ServiceUnavailableException(
-        'Email delivery is not configured',
-      );
+      throw new ServiceUnavailableException('Email delivery is not configured');
     }
     const port = Number(this.configService.get<string>('SMTP_PORT') ?? '465');