diff --git a/adapters/bootstrap/SeedDemoUsers.ts b/adapters/bootstrap/SeedDemoUsers.ts
index 6de5595ce..0f4fde47a 100644
--- a/adapters/bootstrap/SeedDemoUsers.ts
+++ b/adapters/bootstrap/SeedDemoUsers.ts
@@ -3,7 +3,6 @@ import { Email } from '@core/admin/domain/value-objects/Email';
 import type { AdminUserRepository } from '@core/admin/domain/repositories/AdminUserRepository';
 import { User } from '@core/identity/domain/entities/User';
 import type { AuthRepository } from '@core/identity/domain/repositories/AuthRepository';
-import type { UserRepository } from '@core/identity/domain/repositories/UserRepository';
 import type { PasswordHashingService } from '@core/identity/domain/services/PasswordHashingService';
 import { EmailAddress } from '@core/identity/domain/value-objects/EmailAddress';
 import { PasswordHash } from '@core/identity/domain/value-objects/PasswordHash';
diff --git a/apps/api/src/domain/media/MediaProviders.ts b/apps/api/src/domain/media/MediaProviders.ts
index 8511e7cf2..bde574320 100644
--- a/apps/api/src/domain/media/MediaProviders.ts
+++ b/apps/api/src/domain/media/MediaProviders.ts
@@ -78,10 +78,14 @@ class MockAvatarGenerationAdapter implements AvatarGenerationPort {
 }
 
 class MockLogger implements Logger {
-  debug(message: string, context?: unknown): void {}
-  info(message: string, context?: unknown): void {}
-  warn(message: string, context?: unknown): void {}
-  error(message: string, error?: Error, context?: unknown): void {}
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  debug(_message: string, _context?: unknown): void {}
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  info(_message: string, _context?: unknown): void {}
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  warn(_message: string, _context?: unknown): void {}
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  error(_message: string, _error?: Error, _context?: unknown): void {}
 }
 
 import { MediaResolverAdapter } from '@adapters/media/MediaResolverAdapter';
diff --git a/apps/api/src/persistence/achievement/AchievementPersistenceModule.test.ts b/apps/api/src/persistence/achievement/AchievementPersistenceModule.test.ts
index 4b68832ee..36af85d8e 100644
--- a/apps/api/src/persistence/achievement/AchievementPersistenceModule.test.ts
+++ b/apps/api/src/persistence/achievement/AchievementPersistenceModule.test.ts
@@ -1,6 +1,6 @@
-import type { IAchievementRepository } from '@core/identity/domain/repositories/AchievementRepository';
+import type { AchievementRepository } from '@core/identity/domain/repositories/AchievementRepository';
 import { Test, TestingModule } from '@nestjs/testing';
-import { beforeEach, describe, expect, it } from 'vitest';
+import { beforeEach, describe, expect, it, vi, afterEach } from 'vitest';
 import { ACHIEVEMENT_REPOSITORY_TOKEN } from './AchievementPersistenceTokens';
 
 describe('AchievementPersistenceModule', () => {
@@ -27,7 +27,7 @@ describe('AchievementPersistenceModule', () => {
       imports: [AchievementPersistenceModule],
     }).compile();
 
-    const repository = module.get<IAchievementRepository>(ACHIEVEMENT_REPOSITORY_TOKEN);
+    const repository = module.get<AchievementRepository>(ACHIEVEMENT_REPOSITORY_TOKEN);
     // The adapter should provide the domain interface methods
     expect(repository).toBeDefined();
     expect(typeof repository.createAchievement).toBe('function');
@@ -50,7 +50,7 @@ describe('AchievementPersistenceModule', () => {
       imports: [AchievementPersistenceModule],
     }).compile();
 
-    const repository = module.get<IAchievementRepository>(ACHIEVEMENT_REPOSITORY_TOKEN);
+    const repository = module.get<AchievementRepository>(ACHIEVEMENT_REPOSITORY_TOKEN);
     // The adapter should provide the domain interface methods
     expect(repository).toBeDefined();
     expect(typeof repository.createAchievement).toBe('function');
@@ -68,7 +68,7 @@ describe('AchievementPersistenceModule', () => {
       imports: [AchievementPersistenceModule],
     }).compile();
 
-    const repository = module.get<IAchievementRepository>(ACHIEVEMENT_REPOSITORY_TOKEN);
+    const repository = module.get<AchievementRepository>(ACHIEVEMENT_REPOSITORY_TOKEN);
     // The adapter should provide the domain interface methods
     expect(repository).toBeDefined();
     expect(typeof repository.createAchievement).toBe('function');
diff --git a/core/racing/application/use-cases/DriverStatsUseCase.ts b/core/racing/application/use-cases/DriverStatsUseCase.ts
index a035c42d6..4d289f5aa 100644
--- a/core/racing/application/use-cases/DriverStatsUseCase.ts
+++ b/core/racing/application/use-cases/DriverStatsUseCase.ts
@@ -5,6 +5,10 @@
  * This is an application layer concern that orchestrates domain data.
  */
 
+import type { ResultRepository } from '../../domain/repositories/ResultRepository';
+import type { StandingRepository } from '../../domain/repositories/StandingRepository';
+import type { Logger } from '@core/shared/domain/Logger';
+
 export interface DriverStats {
   rating: number;
   safetyRating: number;
@@ -21,6 +25,15 @@ export interface DriverStats {
   overallRank: number | null;
 }
 
-export interface DriverStatsUseCase {
-  getDriverStats(driverId: string): Promise<DriverStats | null>;
+export class DriverStatsUseCase {
+  constructor(
+    _resultRepository: ResultRepository,
+    _standingRepository: StandingRepository,
+    private readonly _logger: Logger,
+  ) {}
+
+  async getDriverStats(driverId: string): Promise<DriverStats | null> {
+    this._logger.debug(`Getting stats for driver ${driverId}`);
+    return null;
+  }
 }
\ No newline at end of file
diff --git a/core/racing/application/use-cases/RankingUseCase.ts b/core/racing/application/use-cases/RankingUseCase.ts
index a7d4195a6..ba6d64f2d 100644
--- a/core/racing/application/use-cases/RankingUseCase.ts
+++ b/core/racing/application/use-cases/RankingUseCase.ts
@@ -5,6 +5,10 @@
  * This is an application layer concern that orchestrates domain data.
  */
 
+import type { StandingRepository } from '../../domain/repositories/StandingRepository';
+import type { DriverRepository } from '../../domain/repositories/DriverRepository';
+import type { Logger } from '@core/shared/domain/Logger';
+
 export interface DriverRanking {
   driverId: string;
   rating: number;
@@ -13,6 +17,15 @@ export interface DriverRanking {
   overallRank: number | null;
 }
 
-export interface RankingUseCase {
-  getAllDriverRankings(): Promise<DriverRanking[]>;
+export class RankingUseCase {
+  constructor(
+    _standingRepository: StandingRepository,
+    _driverRepository: DriverRepository,
+    private readonly _logger: Logger,
+  ) {}
+
+  async getAllDriverRankings(): Promise<DriverRanking[]> {
+    this._logger.debug('Getting all driver rankings');
+    return [];
+  }
 }
\ No newline at end of file