diff --git a/tests/common.ts b/tests/common.ts
index 555239e..ca238b3 100644
--- a/tests/common.ts
+++ b/tests/common.ts
@@ -2,6 +2,7 @@ import { afterAll, beforeAll, expect, jest } from '@jest/globals'
 import { readFile } from 'fs/promises'
 import { join } from 'path'
 import puppeteer, { ConsoleMessage } from 'puppeteer'
+
 beforeAll(async () => {
   globalThis.browser = await puppeteer.launch({
     args: [
@@ -46,7 +47,7 @@ export const getTestbed = async () => {
     request.continue()
   })
 
-  const response = await page.goto(`file://${join(__dirname, './testbed.html')}`)
+  const response = await page.goto(`file://${join(__dirname, './testbed.html')}`, { timeout: 0 })
   expect(response).not.toBeNull()
   expect(response?.status()).toBe(200)
 
diff --git a/tests/encode.test.ts b/tests/encode.test.ts
index 87c8bb2..2a3a9da 100644
--- a/tests/encode.test.ts
+++ b/tests/encode.test.ts
@@ -84,5 +84,5 @@ describe('encoder', () => {
         gainMapMax: result.gainMapMax
       }, null, 2)
     ))
-  }, 20000)
+  }, 50000)
 })
diff --git a/global.d.ts b/tests/global.d.ts
similarity index 100%
rename from global.d.ts
rename to tests/global.d.ts
diff --git a/tests/tsconfig.json b/tests/tsconfig.json
new file mode 100644
index 0000000..9f16221
--- /dev/null
+++ b/tests/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "strict": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "noErrorTruncation": true,
+    "noImplicitAny": true,
+    "noImplicitThis": true,
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "moduleResolution": "NodeNext",
+    "module": "NodeNext",
+    "target": "ES2015"
+  }
+}