diff --git a/tests/config.defaults.test.ts b/src/config.defaults.test.ts
similarity index 95%
rename from tests/config.defaults.test.ts
rename to src/config.defaults.test.ts
index d93f1e9..2816478 100644
--- a/tests/config.defaults.test.ts
+++ b/src/config.defaults.test.ts
@@ -1,6 +1,6 @@
 import dotenv from 'dotenv'
 import { describe, expect, it, vi } from 'vitest'
-import type { Config } from '../src/config.js'
+import type { Config } from './config.js'
 
 vi.mock('dotenv', () => ({
   default: {
diff --git a/tests/config.error.test.ts b/src/config.error.test.ts
similarity index 100%
rename from tests/config.error.test.ts
rename to src/config.error.test.ts
diff --git a/tests/config.overwrite.test.ts b/src/config.overwrite.test.ts
similarity index 96%
rename from tests/config.overwrite.test.ts
rename to src/config.overwrite.test.ts
index 1ca6f70..7e51697 100644
--- a/tests/config.overwrite.test.ts
+++ b/src/config.overwrite.test.ts
@@ -1,6 +1,6 @@
 import dotenv from 'dotenv'
 import { describe, expect, it, vi } from 'vitest'
-import type { Config } from '../src/config.js'
+import type { Config } from './config.js'
 
 vi.mock('dotenv', () => ({
   default: {
diff --git a/tests/database/index.test.ts b/src/database/index.test.ts
similarity index 69%
rename from tests/database/index.test.ts
rename to src/database/index.test.ts
index ad92b73..695b342 100644
--- a/tests/database/index.test.ts
+++ b/src/database/index.test.ts
@@ -1,7 +1,7 @@
 import { describe, expect, it, vi } from 'vitest'
-import postgres from '../../src/database/postgres.js'
+import postgres from './postgres.js'
 
-vi.mock('../../src/database/postgres.js', () => ({
+vi.mock('./postgres.js', () => ({
   default: vi.fn(),
 }))
 
@@ -11,7 +11,7 @@ describe('index', () => {
   it('should export databases', async () => {
     expect.assertions(2)
 
-    const actual = await import('../../src/database/index.js')
+    const actual = await import('./index.js')
 
     const expected = { postgres: mockPostgres }
     expect.soft(actual).toMatchObject(expected)
diff --git a/tests/database/postgres.test.ts b/src/database/postgres.test.ts
similarity index 77%
rename from tests/database/postgres.test.ts
rename to src/database/postgres.test.ts
index 409b4c1..c30f7fb 100644
--- a/tests/database/postgres.test.ts
+++ b/src/database/postgres.test.ts
@@ -1,6 +1,6 @@
 import pg from 'pg'
 import { describe, expect, it, vi } from 'vitest'
-import config from '../../src/config.js'
+import config from '../config.js'
 
 vi.mock('pg', () => {
   return {
@@ -9,7 +9,7 @@ vi.mock('pg', () => {
     },
   }
 })
-vi.mock('../../src/config', () => ({
+vi.mock('../config', () => ({
   default: {
     database: { connectionString: 'connectionString' },
   },
@@ -22,7 +22,7 @@ describe('postgres', () => {
   it('should be tested', async () => {
     expect.assertions(2)
 
-    const { default: actual } = await import('../../src/database/postgres.js')
+    const { default: actual } = await import('./postgres.js')
 
     expect.soft(actual).toStrictEqual(new pg.Pool(mockConfig.database))
     expect.soft(mockPg.Pool).toHaveBeenCalledWith(mockConfig.database)
diff --git a/tests/index.test.ts b/src/index.test.ts
similarity index 81%
rename from tests/index.test.ts
rename to src/index.test.ts
index d6d4530..2bec590 100644
--- a/tests/index.test.ts
+++ b/src/index.test.ts
@@ -1,13 +1,13 @@
 import koa from 'koa'
-import { describe, expect, it, vi } from 'vitest'
-import config from '../src/config.js'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import config from './config.js'
 import {
   bodyParser,
   compress,
   helmet,
   postGraphile,
-} from '../src/middleware/index.js'
-import { healthRouter } from '../src/router/index.js'
+} from './middleware/index.js'
+import { healthRouter } from './router/index.js'
 
 vi.mock('koa', () => ({
   default: vi.fn(
@@ -19,30 +19,33 @@ vi.mock('koa', () => ({
     },
   ),
 }))
-vi.mock('../src/config.js', () => ({
+vi.mock('./config.js', () => ({
   default: {
     port: 1234,
   },
 }))
-vi.mock('../src/middleware/index.js', () => ({
+vi.mock('./middleware/index.js', () => ({
   bodyParser: vi.fn().mockName('bodyParser'),
   compress: vi.fn().mockName('compress'),
   helmet: vi.fn().mockName('helmet'),
   postGraphile: vi.fn().mockName('postGraphile'),
 }))
-vi.mock('../src/router/index.js', () => ({
+vi.mock('./router/index.js', () => ({
   healthRouter: {
     routes: vi.fn().mockName('healthRouter.routes'),
     allowedMethods: vi.fn().mockName('healthRouter.allowedMethods'),
   },
 }))
-vi.spyOn(globalThis.console, 'log').mockImplementation(() => {})
 
 describe('index', () => {
+  beforeEach(() => {
+    vi.spyOn(globalThis.console, 'log').mockImplementation(() => {})
+  })
+
   it('should be tested', async () => {
     expect.assertions(12)
 
-    await import('../src/index.js')
+    await import('./index.js')
 
     expect.soft(vi.mocked(koa)).toHaveBeenCalledTimes(1)
     const mockKoaInstance = vi.mocked(koa).mock.results[0]?.value
diff --git a/tests/middleware/bodyparser.test.ts b/src/middleware/bodyparser.test.ts
similarity index 76%
rename from tests/middleware/bodyparser.test.ts
rename to src/middleware/bodyparser.test.ts
index 75672e6..5f14915 100644
--- a/tests/middleware/bodyparser.test.ts
+++ b/src/middleware/bodyparser.test.ts
@@ -8,9 +8,7 @@ describe('bodyparser', () => {
   it('should export bodyparser', async () => {
     expect.assertions(1)
 
-    const { default: actual } = await import(
-      '../../src/middleware/bodyparser.js'
-    )
+    const { default: actual } = await import('./bodyparser.js')
 
     expect(actual).toBe(mockBodyParser())
   })
diff --git a/src/middleware/compress.test.ts b/src/middleware/compress.test.ts
new file mode 100644
index 0000000..d82707f
--- /dev/null
+++ b/src/middleware/compress.test.ts
@@ -0,0 +1,16 @@
+import compress from 'koa-compress'
+import { describe, expect, it, vi } from 'vitest'
+
+vi.mock('koa-compress')
+
+describe('compress', () => {
+  it('should export compress', async () => {
+    expect.assertions(3)
+
+    const { default: actual } = await import('./compress.js')
+
+    expect.soft(compress).toHaveBeenCalledOnce()
+    expect.soft(compress).toHaveBeenCalledWith({ threshold: 0 })
+    expect.soft(actual).toBe(compress({ threshold: 0 }))
+  })
+})
diff --git a/src/middleware/helmet.test.ts b/src/middleware/helmet.test.ts
new file mode 100644
index 0000000..76f514e
--- /dev/null
+++ b/src/middleware/helmet.test.ts
@@ -0,0 +1,15 @@
+import helmet from 'koa-helmet'
+import { describe, expect, it, vi } from 'vitest'
+
+vi.mock('koa-helmet')
+
+describe('helmet', () => {
+  it('should export helmet', async () => {
+    expect.assertions(2)
+
+    const { default: actual } = await import('./helmet.js')
+
+    expect(helmet.default).toHaveBeenCalledOnce()
+    expect(actual).toStrictEqual(helmet.default())
+  })
+})
diff --git a/src/middleware/index.test.ts b/src/middleware/index.test.ts
new file mode 100644
index 0000000..c4ec9c2
--- /dev/null
+++ b/src/middleware/index.test.ts
@@ -0,0 +1,35 @@
+import { describe, expect, it, vi } from 'vitest'
+import bodyParser from './bodyparser.js'
+import compress from './compress.js'
+import helmet from './helmet.js'
+import postGraphile from './postgraphile.js'
+
+vi.mock('./bodyparser', () => ({
+  default: vi.fn().mockName('bodyparser'),
+}))
+vi.mock('./compress', () => ({
+  default: vi.fn().mockName('compress'),
+}))
+vi.mock('./helmet', () => ({
+  default: vi.fn().mockName('helmet'),
+}))
+vi.mock('./postgraphile', () => ({
+  default: vi.fn().mockName('postgraphile'),
+}))
+
+describe('index', () => {
+  it('should export middlewares', async () => {
+    expect.assertions(2)
+
+    const actual = await import('./index.js')
+
+    const expected = {
+      bodyParser,
+      compress,
+      helmet,
+      postGraphile,
+    }
+    expect.soft(actual).toMatchObject(expected)
+    expect.soft(Object.keys(actual)).toEqual(Object.keys(expected))
+  })
+})
diff --git a/tests/middleware/postgraphile.test.ts b/src/middleware/postgraphile.test.ts
similarity index 93%
rename from tests/middleware/postgraphile.test.ts
rename to src/middleware/postgraphile.test.ts
index 2322357..fa3c0a8 100644
--- a/tests/middleware/postgraphile.test.ts
+++ b/src/middleware/postgraphile.test.ts
@@ -24,9 +24,7 @@ describe('postgraphile', () => {
   it('should be tested', async () => {
     expect.assertions(3)
 
-    const { default: actual } = await import(
-      '../../src/middleware/postgraphile.js'
-    )
+    const { default: actual } = await import('./postgraphile.js')
 
     expect.soft(mockPostgraphile).toHaveBeenCalledOnce()
     expect
diff --git a/tests/router/health.test.ts b/src/router/health.test.ts
similarity index 92%
rename from tests/router/health.test.ts
rename to src/router/health.test.ts
index 09a4c52..f27d33b 100644
--- a/tests/router/health.test.ts
+++ b/src/router/health.test.ts
@@ -1,10 +1,10 @@
 import koa from 'koa'
 import supertest from 'supertest'
 import { afterAll, describe, expect, it, vi } from 'vitest'
-import { postgres } from '../../src/database/index.js'
-import healthRouter from '../../src/router/health.js'
+import { postgres } from '../database/index.js'
+import healthRouter from './health.js'
 
-vi.mock('../../src/database/index.js', () => ({
+vi.mock('../database/index.js', () => ({
   postgres: {
     query: vi.fn(),
   },
diff --git a/tests/router/index.test.ts b/src/router/index.test.ts
similarity index 71%
rename from tests/router/index.test.ts
rename to src/router/index.test.ts
index c07f979..a644e94 100644
--- a/tests/router/index.test.ts
+++ b/src/router/index.test.ts
@@ -1,7 +1,7 @@
 import { describe, expect, it, vi } from 'vitest'
-import healthRouter from '../../src/router/health.js'
+import healthRouter from './health.js'
 
-vi.mock('../../src/router/health.js', () => ({
+vi.mock('./health.js', () => ({
   default: vi.fn(),
 }))
 
@@ -11,7 +11,7 @@ describe('index', () => {
   it('should export routers', async () => {
     expect.assertions(2)
 
-    const actual = await import('../../src/router/index.js')
+    const actual = await import('./index.js')
 
     const expected = { healthRouter: mockHealthRouter }
     expect.soft(actual).toMatchObject(expected)
diff --git a/tests/middleware/compress.test.ts b/tests/middleware/compress.test.ts
deleted file mode 100644
index 6e75f35..0000000
--- a/tests/middleware/compress.test.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import compress from 'koa-compress'
-import { describe, expect, it, vi } from 'vitest'
-
-vi.mock('koa-compress')
-
-const mockCompress = vi.mocked(compress)
-
-describe('compress', () => {
-  it('should export compress', async () => {
-    expect.assertions(3)
-
-    const { default: actual } = await import('../../src/middleware/compress.js')
-
-    expect.soft(mockCompress).toHaveBeenCalledOnce()
-    expect.soft(mockCompress).toHaveBeenCalledWith({ threshold: 0 })
-    expect.soft(actual).toBe(mockCompress({ threshold: 0 }))
-  })
-})
diff --git a/tests/middleware/helmet.test.ts b/tests/middleware/helmet.test.ts
deleted file mode 100644
index 468f29c..0000000
--- a/tests/middleware/helmet.test.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import helmet from 'koa-helmet'
-import { describe, expect, it, vi } from 'vitest'
-
-vi.mock('koa-helmet')
-
-const mockHelmet = vi.mocked(helmet.default)
-
-describe('helmet', () => {
-  it('should export helmet', async () => {
-    expect.assertions(2)
-
-    const { default: actual } = await import('../../src/middleware/helmet.js')
-
-    expect(mockHelmet).toHaveBeenCalledOnce()
-    expect(actual).toStrictEqual(mockHelmet())
-  })
-})
diff --git a/tests/middleware/index.test.ts b/tests/middleware/index.test.ts
deleted file mode 100644
index 56a2661..0000000
--- a/tests/middleware/index.test.ts
+++ /dev/null
@@ -1,40 +0,0 @@
-import { describe, expect, it, vi } from 'vitest'
-import bodyParser from '../../src/middleware/bodyparser.js'
-import compress from '../../src/middleware/compress.js'
-import helmet from '../../src/middleware/helmet.js'
-import postGraphile from '../../src/middleware/postgraphile.js'
-
-vi.mock('../../src/middleware/bodyparser', () => ({
-  default: vi.fn().mockName('bodyparser'),
-}))
-vi.mock('../../src/middleware/compress', () => ({
-  default: vi.fn().mockName('compress'),
-}))
-vi.mock('../../src/middleware/helmet', () => ({
-  default: vi.fn().mockName('helmet'),
-}))
-vi.mock('../../src/middleware/postgraphile', () => ({
-  default: vi.fn().mockName('postgraphile'),
-}))
-
-const mockBodyParser = vi.mocked(bodyParser)
-const mockCompress = vi.mocked(compress)
-const mockHelmet = vi.mocked(helmet)
-const mockPostGraphile = vi.mocked(postGraphile)
-
-describe('index', () => {
-  it('should export middlewares', async () => {
-    expect.assertions(2)
-
-    const actual = await import('../../src/middleware/index.js')
-
-    const expected = {
-      bodyParser: mockBodyParser,
-      compress: mockCompress,
-      helmet: mockHelmet,
-      postGraphile: mockPostGraphile,
-    }
-    expect.soft(actual).toMatchObject(expected)
-    expect.soft(Object.keys(actual)).toEqual(Object.keys(expected))
-  })
-})
diff --git a/tsconfig.json b/tsconfig.json
index c954e52..037604b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,5 +7,6 @@
     "rootDir": "src",
     "outDir": "dist"
   },
-  "include": ["src"]
+  "include": ["src"],
+  "exclude": ["src/**/*.test.ts"]
 }
diff --git a/tsconfig.test.json b/tsconfig.test.json
index 6e68b75..1eed8ce 100644
--- a/tsconfig.test.json
+++ b/tsconfig.test.json
@@ -3,11 +3,5 @@
     "@tsconfig/strictest/tsconfig.json",
     "@tsconfig/node22/tsconfig.json"
   ],
-  "include": [
-    "tests/**/*.ts",
-    "testsInt/**/*.ts",
-    "testsInt/global-setup.ts",
-    "vitest.config.ts",
-    "vitest.int.config.ts"
-  ]
+  "include": ["testsInt/**/*.ts", "vitest.config.ts", "vitest.int.config.ts"]
 }
diff --git a/vitest.config.ts b/vitest.config.ts
index 97ec416..5986f1d 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -2,9 +2,19 @@ import { defineConfig } from 'vitest/config'
 
 export default defineConfig({
   test: {
-    include: ['tests/**/*.{test,spec}.?(c|m)[jt]s?(x)'],
+    include: ['src/**/*.{test,spec}.?(c|m)[jt]s?(x)'],
+    clearMocks: true,
     coverage: {
-      include: ['src/**'],
+      enabled: true,
+      provider: 'v8',
+      reporter: ['text', 'lcov', 'json-summary'],
+      include: ['src/**/*.{js,ts}'],
+      thresholds: {
+        statements: 100,
+      },
     },
+    unstubEnvs: true,
+    unstubGlobals: true,
+    restoreMocks: true,
   },
 })