diff --git a/src/app.module.ts b/src/app.module.ts
index 1ae6b0d853..5072501cb9 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -51,6 +51,7 @@ import { DelegatesV2Module } from '@/routes/delegates/v2/delegates.v2.module';
 import { AccountsModule } from '@/routes/accounts/accounts.module';
 import { NotificationsModuleV2 } from '@/routes/notifications/v2/notifications.module';
 import { TargetedMessagingModule } from '@/routes/targeted-messaging/targeted-messaging.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 @Module({})
 export class AppModule implements NestModule {
@@ -71,6 +72,7 @@ export class AppModule implements NestModule {
     return {
       module: AppModule,
       imports: [
+        PostgresDatabaseModule,
         // features
         AboutModule,
         ...(isAccountsFeatureEnabled ? [AccountsModule] : []),
diff --git a/src/datasources/db/__tests__/test.postgres-database.module.ts b/src/datasources/db/__tests__/test.postgres-database.module.ts
new file mode 100644
index 0000000000..7c937da8c7
--- /dev/null
+++ b/src/datasources/db/__tests__/test.postgres-database.module.ts
@@ -0,0 +1,16 @@
+import { Module } from '@nestjs/common';
+
+/**
+ * The {@link TestPostgresDatabaseModule} should be used whenever you want to
+ * override the values provided by the {@link PostgresDatabase}.
+ *
+ * This will create a TestModule which uses the implementation of PostgresDatabase but
+ * overrides the real DB_INSTANCE with a null value.
+ *
+ */
+@Module({
+  providers: [{ provide: 'DB_INSTANCE', useFactory: (): null => null }],
+  exports: [],
+  imports: [],
+})
+export class TestPostgresDatabaseModule {}
diff --git a/src/routes/about/__tests__/get-about.e2e-spec.ts b/src/routes/about/__tests__/get-about.e2e-spec.ts
index 91296ff6df..76f08a6602 100644
--- a/src/routes/about/__tests__/get-about.e2e-spec.ts
+++ b/src/routes/about/__tests__/get-about.e2e-spec.ts
@@ -1,11 +1,13 @@
-import type { INestApplication } from '@nestjs/common';
-import { Test } from '@nestjs/testing';
-import request from 'supertest';
-import { AppModule } from '@/app.module';
-import { expect } from '@jest/globals';
 import '@/__tests__/matchers/to-be-string-or-null';
+import { AppModule } from '@/app.module';
 import { CacheKeyPrefix } from '@/datasources/cache/constants';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
+import { expect } from '@jest/globals';
+import type { INestApplication } from '@nestjs/common';
+import { Test } from '@nestjs/testing';
 import type { Server } from 'net';
+import request from 'supertest';
 
 describe('Get about e2e test', () => {
   let app: INestApplication<Server>;
@@ -15,6 +17,8 @@ describe('Get about e2e test', () => {
     const moduleRef = await Test.createTestingModule({
       imports: [AppModule.register()],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideProvider(CacheKeyPrefix)
       .useValue(cacheKeyPrefix)
       .compile();
diff --git a/src/routes/accounts/accounts.controller.spec.ts b/src/routes/accounts/accounts.controller.spec.ts
index 3c4902ea09..6f7eff0ee0 100644
--- a/src/routes/accounts/accounts.controller.spec.ts
+++ b/src/routes/accounts/accounts.controller.spec.ts
@@ -8,6 +8,8 @@ import { TestCounterfactualSafesDataSourceModule } from '@/datasources/accounts/
 import { CounterfactualSafesDatasourceModule } from '@/datasources/accounts/counterfactual-safes/counterfactual-safes.datasource.module';
 import { TestCacheModule } from '@/datasources/cache/__tests__/test.cache.module';
 import { CacheModule } from '@/datasources/cache/cache.module';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 import jwtConfiguration from '@/datasources/jwt/configuration/__tests__/jwt.configuration';
 import {
   JWT_CONFIGURATION_MODULE,
@@ -62,6 +64,8 @@ describe('AccountsController', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(JWT_CONFIGURATION_MODULE)
       .useModule(JwtConfigurationModule.register(jwtConfiguration))
       .overrideModule(AccountsDatasourceModule)
diff --git a/src/routes/alerts/alerts.controller.spec.ts b/src/routes/alerts/alerts.controller.spec.ts
index 36c609c9e6..11bee7b99d 100644
--- a/src/routes/alerts/alerts.controller.spec.ts
+++ b/src/routes/alerts/alerts.controller.spec.ts
@@ -57,6 +57,8 @@ import {
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 // The `x-tenderly-signature` header contains a cryptographic signature. The webhook request signature is
 // a HMAC SHA256 hash of concatenated signing secret, request payload, and timestamp, in this order.
@@ -102,6 +104,8 @@ describe('Alerts (Unit)', () => {
       const moduleFixture: TestingModule = await Test.createTestingModule({
         imports: [AppModule.register(testConfiguration)],
       })
+        .overrideModule(PostgresDatabaseModule)
+        .useModule(TestPostgresDatabaseModule)
         .overrideModule(JWT_CONFIGURATION_MODULE)
         .useModule(JwtConfigurationModule.register(jwtConfiguration))
         .overrideModule(ALERTS_CONFIGURATION_MODULE)
diff --git a/src/routes/auth/auth.controller.spec.ts b/src/routes/auth/auth.controller.spec.ts
index 5d889ab74e..9c07e5bc11 100644
--- a/src/routes/auth/auth.controller.spec.ts
+++ b/src/routes/auth/auth.controller.spec.ts
@@ -36,6 +36,8 @@ import {
   IBlockchainApiManager,
 } from '@/domain/interfaces/blockchain-api.manager.interface';
 import { TestBlockchainApiManagerModule } from '@/datasources/blockchain/__tests__/test.blockchain-api.manager';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 const verifySiweMessageMock = jest.fn();
 
@@ -49,6 +51,8 @@ describe('AuthController', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(config)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(JWT_CONFIGURATION_MODULE)
       .useModule(JwtConfigurationModule.register(jwtConfiguration))
       .overrideModule(BlockchainApiManagerModule)
diff --git a/src/routes/balances/balances.controller.spec.ts b/src/routes/balances/balances.controller.spec.ts
index 8180924e0c..e94bfc259d 100644
--- a/src/routes/balances/balances.controller.spec.ts
+++ b/src/routes/balances/balances.controller.spec.ts
@@ -4,6 +4,8 @@ import { IConfigurationService } from '@/config/configuration.service.interface'
 import configuration from '@/config/entities/__tests__/configuration';
 import { TestCacheModule } from '@/datasources/cache/__tests__/test.cache.module';
 import { CacheModule } from '@/datasources/cache/cache.module';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 import { TestNetworkModule } from '@/datasources/network/__tests__/test.network.module';
 import { NetworkResponseError } from '@/datasources/network/entities/network.error.entity';
 import { NetworkModule } from '@/datasources/network/network.module';
@@ -48,6 +50,8 @@ describe('Balances Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/chains/chains.controller.spec.ts b/src/routes/chains/chains.controller.spec.ts
index 2c23bd2071..cf1c21716c 100644
--- a/src/routes/chains/chains.controller.spec.ts
+++ b/src/routes/chains/chains.controller.spec.ts
@@ -37,6 +37,8 @@ import {
 } from '@/domain/interfaces/blockchain-api.manager.interface';
 import { TestBlockchainApiManagerModule } from '@/datasources/blockchain/__tests__/test.blockchain-api.manager';
 import type { FakeBlockchainApiManager } from '@/datasources/blockchain/__tests__/fake.blockchain-api.manager';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 const mockGetBlock = jest.fn();
 describe('Chains Controller (Unit)', () => {
@@ -65,6 +67,8 @@ describe('Chains Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/collectibles/collectibles.controller.spec.ts b/src/routes/collectibles/collectibles.controller.spec.ts
index c0eb4a03f9..9f0b58152f 100644
--- a/src/routes/collectibles/collectibles.controller.spec.ts
+++ b/src/routes/collectibles/collectibles.controller.spec.ts
@@ -32,6 +32,8 @@ import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
 import { getAddress } from 'viem';
 import { safeBuilder } from '@/domain/safe/entities/__tests__/safe.builder';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Collectibles Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -53,6 +55,8 @@ describe('Collectibles Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/community/community.controller.spec.ts b/src/routes/community/community.controller.spec.ts
index 7a5aa1f879..ea86d303e0 100644
--- a/src/routes/community/community.controller.spec.ts
+++ b/src/routes/community/community.controller.spec.ts
@@ -41,6 +41,8 @@ import {
   campaignActivityBuilder,
   toJson as campaignActivityToJson,
 } from '@/domain/community/entities/__tests__/campaign-activity.builder';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Community (Unit)', () => {
   let app: INestApplication<Server>;
@@ -53,6 +55,8 @@ describe('Community (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/contracts/contracts.controller.spec.ts b/src/routes/contracts/contracts.controller.spec.ts
index c4e6d967b2..4dc2c34373 100644
--- a/src/routes/contracts/contracts.controller.spec.ts
+++ b/src/routes/contracts/contracts.controller.spec.ts
@@ -20,6 +20,8 @@ import { NetworkResponseError } from '@/datasources/network/entities/network.err
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Contracts controller', () => {
   let app: INestApplication<Server>;
@@ -32,6 +34,8 @@ describe('Contracts controller', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/delegates/delegates.controller.spec.ts b/src/routes/delegates/delegates.controller.spec.ts
index f7089db943..04b6305c5b 100644
--- a/src/routes/delegates/delegates.controller.spec.ts
+++ b/src/routes/delegates/delegates.controller.spec.ts
@@ -27,6 +27,8 @@ import { getAddress } from 'viem';
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Delegates controller', () => {
   let app: INestApplication<Server>;
@@ -39,6 +41,8 @@ describe('Delegates controller', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/estimations/estimations.controller.spec.ts b/src/routes/estimations/estimations.controller.spec.ts
index 4729277c10..64ad98d19b 100644
--- a/src/routes/estimations/estimations.controller.spec.ts
+++ b/src/routes/estimations/estimations.controller.spec.ts
@@ -28,6 +28,8 @@ import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
 import { getAddress } from 'viem';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Estimations Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -40,6 +42,8 @@ describe('Estimations Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/health/health.controller.spec.ts b/src/routes/health/health.controller.spec.ts
index 9782c94ff4..16082ebc8c 100644
--- a/src/routes/health/health.controller.spec.ts
+++ b/src/routes/health/health.controller.spec.ts
@@ -18,6 +18,8 @@ import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-
 import type { IQueueReadiness } from '@/domain/interfaces/queue-readiness.interface';
 import { QueueReadiness } from '@/domain/interfaces/queue-readiness.interface';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Health Controller tests', () => {
   let app: INestApplication<Server>;
@@ -30,6 +32,8 @@ describe('Health Controller tests', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/hooks/hooks.controller.spec.ts b/src/routes/hooks/hooks.controller.spec.ts
index fc818769d0..12a6967705 100644
--- a/src/routes/hooks/hooks.controller.spec.ts
+++ b/src/routes/hooks/hooks.controller.spec.ts
@@ -17,6 +17,8 @@ import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
 import { NotificationsDatasourceModule } from '@/datasources/notifications/notifications.datasource.module';
 import { TestNotificationsDatasourceModule } from '@/datasources/notifications/__tests__/test.notifications.datasource.module';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Post Hook Events (Unit)', () => {
   let app: INestApplication<Server>;
@@ -27,6 +29,8 @@ describe('Post Hook Events (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(config)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/messages/messages.controller.spec.ts b/src/routes/messages/messages.controller.spec.ts
index baf03114ad..49d91d40ab 100644
--- a/src/routes/messages/messages.controller.spec.ts
+++ b/src/routes/messages/messages.controller.spec.ts
@@ -32,6 +32,8 @@ import { NetworkResponseError } from '@/datasources/network/entities/network.err
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Messages controller', () => {
   let app: INestApplication<Server>;
@@ -44,6 +46,8 @@ describe('Messages controller', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/notifications/v1/notifications.controller.spec.ts b/src/routes/notifications/v1/notifications.controller.spec.ts
index 6ed4e760d5..3865ae3fde 100644
--- a/src/routes/notifications/v1/notifications.controller.spec.ts
+++ b/src/routes/notifications/v1/notifications.controller.spec.ts
@@ -24,6 +24,8 @@ import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
 import { getAddress } from 'viem';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Notifications Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -36,6 +38,8 @@ describe('Notifications Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/notifications/v2/notifications.controller.spec.ts b/src/routes/notifications/v2/notifications.controller.spec.ts
index 73c0656061..691898c804 100644
--- a/src/routes/notifications/v2/notifications.controller.spec.ts
+++ b/src/routes/notifications/v2/notifications.controller.spec.ts
@@ -44,6 +44,8 @@ import request from 'supertest';
 import { getAddress } from 'viem';
 import { CounterfactualSafesDatasourceModule } from '@/datasources/accounts/counterfactual-safes/counterfactual-safes.datasource.module';
 import { TestCounterfactualSafesDataSourceModule } from '@/datasources/accounts/counterfactual-safes/__tests__/test.counterfactual-safes.datasource.module';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Notifications Controller V2 (Unit)', () => {
   let app: INestApplication<Server>;
@@ -69,6 +71,8 @@ describe('Notifications Controller V2 (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(JWT_CONFIGURATION_MODULE)
       .useModule(JwtConfigurationModule.register(jwtConfiguration))
       .overrideModule(AccountsDatasourceModule)
diff --git a/src/routes/owners/owners.controller.spec.ts b/src/routes/owners/owners.controller.spec.ts
index 1a129ab208..704ee6781c 100644
--- a/src/routes/owners/owners.controller.spec.ts
+++ b/src/routes/owners/owners.controller.spec.ts
@@ -25,6 +25,8 @@ import {
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 import { ChainsRepository } from '@/domain/chains/chains.repository';
 
 describe('Owners Controller (Unit)', () => {
@@ -38,6 +40,8 @@ describe('Owners Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/recovery/recovery.controller.spec.ts b/src/routes/recovery/recovery.controller.spec.ts
index dc70a70eb9..0f2198b2cd 100644
--- a/src/routes/recovery/recovery.controller.spec.ts
+++ b/src/routes/recovery/recovery.controller.spec.ts
@@ -44,6 +44,8 @@ import type { Server } from 'net';
 import { RecoveryController } from '@/routes/recovery/recovery.controller';
 import { checkGuardIsApplied } from '@/__tests__/util/check-guard';
 import { AuthGuard } from '@/routes/auth/guards/auth.guard';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Recovery (Unit)', () => {
   let app: INestApplication<Server>;
@@ -70,6 +72,8 @@ describe('Recovery (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(JWT_CONFIGURATION_MODULE)
       .useModule(JwtConfigurationModule.register(jwtConfiguration))
       .overrideModule(ALERTS_CONFIGURATION_MODULE)
diff --git a/src/routes/relay/relay.controller.spec.ts b/src/routes/relay/relay.controller.spec.ts
index ba0eb8c551..d2c238f7f4 100644
--- a/src/routes/relay/relay.controller.spec.ts
+++ b/src/routes/relay/relay.controller.spec.ts
@@ -51,6 +51,8 @@ import { getDeploymentVersionsByChainIds } from '@/__tests__/deployments.helper'
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 const supportedChainIds = faker.helpers.arrayElements(
   Object.keys(configuration().relay.apiKey),
@@ -100,6 +102,8 @@ describe('Relay controller', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/root/root.controller.spec.ts b/src/routes/root/root.controller.spec.ts
index df06ecfce0..8750c3dfea 100644
--- a/src/routes/root/root.controller.spec.ts
+++ b/src/routes/root/root.controller.spec.ts
@@ -10,6 +10,8 @@ import request from 'supertest';
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Root Controller tests', () => {
   let app: INestApplication<Server>;
@@ -18,6 +20,8 @@ describe('Root Controller tests', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(QueuesApiModule)
diff --git a/src/routes/safe-apps/safe-apps.controller.spec.ts b/src/routes/safe-apps/safe-apps.controller.spec.ts
index a028e76262..396cb334b6 100644
--- a/src/routes/safe-apps/safe-apps.controller.spec.ts
+++ b/src/routes/safe-apps/safe-apps.controller.spec.ts
@@ -22,6 +22,8 @@ import { NetworkService } from '@/datasources/network/network.service.interface'
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Safe Apps Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -34,6 +36,8 @@ describe('Safe Apps Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/safes/safes.controller.spec.ts b/src/routes/safes/safes.controller.spec.ts
index 11b7045ade..5bdb04329c 100644
--- a/src/routes/safes/safes.controller.spec.ts
+++ b/src/routes/safes/safes.controller.spec.ts
@@ -41,6 +41,8 @@ import { getAddress } from 'viem';
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Safes Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -53,6 +55,8 @@ describe('Safes Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/targeted-messaging/targeted-messaging.controller.spec.ts b/src/routes/targeted-messaging/targeted-messaging.controller.spec.ts
index d97241aba4..cbf52b29dc 100644
--- a/src/routes/targeted-messaging/targeted-messaging.controller.spec.ts
+++ b/src/routes/targeted-messaging/targeted-messaging.controller.spec.ts
@@ -4,6 +4,8 @@ import { IConfigurationService } from '@/config/configuration.service.interface'
 import configuration from '@/config/entities/__tests__/configuration';
 import { TestCacheModule } from '@/datasources/cache/__tests__/test.cache.module';
 import { CacheModule } from '@/datasources/cache/cache.module';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 import jwtConfiguration from '@/datasources/jwt/configuration/jwt.configuration';
 import {
   JWT_CONFIGURATION_MODULE,
@@ -54,6 +56,8 @@ describe('TargetedMessagingController', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(JWT_CONFIGURATION_MODULE)
       .useModule(JwtConfigurationModule.register(jwtConfiguration))
       .overrideModule(TargetedMessagingDatasourceModule)
diff --git a/src/routes/transactions/__tests__/controllers/delete-transaction.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/delete-transaction.transactions.controller.spec.ts
index 5aeea89dd6..ce686c8da0 100644
--- a/src/routes/transactions/__tests__/controllers/delete-transaction.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/delete-transaction.transactions.controller.spec.ts
@@ -28,6 +28,8 @@ import type { FakeCacheService } from '@/datasources/cache/__tests__/fake.cache.
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Delete Transaction - Transactions Controller (Unit', () => {
   let app: INestApplication<Server>;
@@ -41,6 +43,8 @@ describe('Delete Transaction - Transactions Controller (Unit', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/transactions/__tests__/controllers/get-creation-transaction.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/get-creation-transaction.transactions.controller.spec.ts
index 5971029f5f..55002efd93 100644
--- a/src/routes/transactions/__tests__/controllers/get-creation-transaction.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/get-creation-transaction.transactions.controller.spec.ts
@@ -4,6 +4,8 @@ import { IConfigurationService } from '@/config/configuration.service.interface'
 import configuration from '@/config/entities/__tests__/configuration';
 import { TestCacheModule } from '@/datasources/cache/__tests__/test.cache.module';
 import { CacheModule } from '@/datasources/cache/cache.module';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 import { TestNetworkModule } from '@/datasources/network/__tests__/test.network.module';
 import { NetworkResponseError } from '@/datasources/network/entities/network.error.entity';
 import { NetworkModule } from '@/datasources/network/network.module';
@@ -34,6 +36,8 @@ describe('Get creation transaction', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/transactions/__tests__/controllers/get-transaction-by-id.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/get-transaction-by-id.transactions.controller.spec.ts
index fd25c5b69b..0549fb68e5 100644
--- a/src/routes/transactions/__tests__/controllers/get-transaction-by-id.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/get-transaction-by-id.transactions.controller.spec.ts
@@ -40,6 +40,8 @@ import { getAddress } from 'viem';
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Get by id - Transactions Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -52,6 +54,8 @@ describe('Get by id - Transactions Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/transactions/__tests__/controllers/list-incoming-transfers-by-safe.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/list-incoming-transfers-by-safe.transactions.controller.spec.ts
index c8a6995247..4ac3a3372f 100644
--- a/src/routes/transactions/__tests__/controllers/list-incoming-transfers-by-safe.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/list-incoming-transfers-by-safe.transactions.controller.spec.ts
@@ -37,6 +37,8 @@ import { getAddress } from 'viem';
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('List incoming transfers by Safe - Transactions Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -49,6 +51,8 @@ describe('List incoming transfers by Safe - Transactions Controller (Unit)', ()
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/transactions/__tests__/controllers/list-module-transactions-by-safe.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/list-module-transactions-by-safe.transactions.controller.spec.ts
index 034d43d8e8..61f7cddf6f 100644
--- a/src/routes/transactions/__tests__/controllers/list-module-transactions-by-safe.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/list-module-transactions-by-safe.transactions.controller.spec.ts
@@ -26,6 +26,8 @@ import { NetworkResponseError } from '@/datasources/network/entities/network.err
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('List module transactions by Safe - Transactions Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -38,6 +40,8 @@ describe('List module transactions by Safe - Transactions Controller (Unit)', ()
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/transactions/__tests__/controllers/list-multisig-transactions-by-safe.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/list-multisig-transactions-by-safe.transactions.controller.spec.ts
index 6e9a344e61..ff8e5896ce 100644
--- a/src/routes/transactions/__tests__/controllers/list-multisig-transactions-by-safe.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/list-multisig-transactions-by-safe.transactions.controller.spec.ts
@@ -36,6 +36,8 @@ import { getAddress } from 'viem';
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('List multisig transactions by Safe - Transactions Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -48,6 +50,8 @@ describe('List multisig transactions by Safe - Transactions Controller (Unit)',
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/transactions/__tests__/controllers/preview-transaction-cow-swap.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/preview-transaction-cow-swap.transactions.controller.spec.ts
index 04d1b7f163..6a6c3a8d42 100644
--- a/src/routes/transactions/__tests__/controllers/preview-transaction-cow-swap.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/preview-transaction-cow-swap.transactions.controller.spec.ts
@@ -32,6 +32,8 @@ import {
   multiSendEncoder,
   multiSendTransactionsEncoder,
 } from '@/domain/contracts/__tests__/encoders/multi-send-encoder.builder';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
 
 describe('Preview transaction - CoW Swap - Transactions Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -62,6 +64,8 @@ describe('Preview transaction - CoW Swap - Transactions Controller (Unit)', () =
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/transactions/__tests__/controllers/preview-transaction-kiln.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/preview-transaction-kiln.transactions.controller.spec.ts
index 5e45c53f7c..c0e76a3b4f 100644
--- a/src/routes/transactions/__tests__/controllers/preview-transaction-kiln.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/preview-transaction-kiln.transactions.controller.spec.ts
@@ -44,6 +44,8 @@ import {
   multiSendEncoder,
   multiSendTransactionsEncoder,
 } from '@/domain/contracts/__tests__/encoders/multi-send-encoder.builder';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Preview transaction - Kiln - Transactions Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -66,6 +68,8 @@ describe('Preview transaction - Kiln - Transactions Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(testConfiguration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)
diff --git a/src/routes/transactions/__tests__/controllers/preview-transaction.transactions.controller.spec.ts b/src/routes/transactions/__tests__/controllers/preview-transaction.transactions.controller.spec.ts
index c0c0b3164c..01ccf2e4e0 100644
--- a/src/routes/transactions/__tests__/controllers/preview-transaction.transactions.controller.spec.ts
+++ b/src/routes/transactions/__tests__/controllers/preview-transaction.transactions.controller.spec.ts
@@ -28,6 +28,8 @@ import { getAddress } from 'viem';
 import { TestQueuesApiModule } from '@/datasources/queues/__tests__/test.queues-api.module';
 import { QueuesApiModule } from '@/datasources/queues/queues-api.module';
 import type { Server } from 'net';
+import { TestPostgresDatabaseModule } from '@/datasources/db/__tests__/test.postgres-database.module';
+import { PostgresDatabaseModule } from '@/datasources/db/postgres-database.module';
 
 describe('Preview transaction - Transactions Controller (Unit)', () => {
   let app: INestApplication<Server>;
@@ -40,6 +42,8 @@ describe('Preview transaction - Transactions Controller (Unit)', () => {
     const moduleFixture: TestingModule = await Test.createTestingModule({
       imports: [AppModule.register(configuration)],
     })
+      .overrideModule(PostgresDatabaseModule)
+      .useModule(TestPostgresDatabaseModule)
       .overrideModule(CacheModule)
       .useModule(TestCacheModule)
       .overrideModule(RequestScopedLoggingModule)