diff --git a/test/unit/esm-interpolate/esm-interpolate.test.tsx b/test/unit/esm-interpolate/esm-interpolate.test.tsx
index c6ffb8137582f0..3be0c8148b968a 100644
--- a/test/unit/esm-interpolate/esm-interpolate.test.tsx
+++ b/test/unit/esm-interpolate/esm-interpolate.test.tsx
@@ -1,4 +1,3 @@
-import React from 'react'
 import { renderToString } from 'react-dom/server'
 import * as nextRouter from 'next/router'
 
diff --git a/test/unit/esm-interpolate/fixture.tsx b/test/unit/esm-interpolate/fixture.tsx
index 90485c11e409de..af413aa5b5a0e4 100644
--- a/test/unit/esm-interpolate/fixture.tsx
+++ b/test/unit/esm-interpolate/fixture.tsx
@@ -1,4 +1,3 @@
-import React from 'react'
 import { useRouter } from 'next/router'
 
 export const Foo = () => {
diff --git a/test/unit/link-warnings.test.tsx b/test/unit/link-warnings.test.tsx
index d102876f6a361e..1ed744fdf5f827 100644
--- a/test/unit/link-warnings.test.tsx
+++ b/test/unit/link-warnings.test.tsx
@@ -3,7 +3,6 @@
  */
 import { act, render } from '@testing-library/react'
 import Link from 'next/link'
-import React from 'react'
 
 describe('<Link/>', () => {
   let spy
diff --git a/test/unit/next-dynamic.test.tsx b/test/unit/next-dynamic.test.tsx
index a46004030e4369..13750260633934 100644
--- a/test/unit/next-dynamic.test.tsx
+++ b/test/unit/next-dynamic.test.tsx
@@ -1,7 +1,6 @@
 /**
  * @jest-environment jsdom
  */
-import React from 'react'
 import { act, render } from '@testing-library/react'
 import dynamic from 'next/dynamic'
 
diff --git a/tsconfig.base.json b/tsconfig.base.json
deleted file mode 100644
index ba074f2baea907..00000000000000
--- a/tsconfig.base.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "compilerOptions": {
-    "strict": false,
-    "noEmit": true,
-    "allowJs": true,
-    "resolveJsonModule": true,
-    "jsx": "react-jsx",
-    "module": "esnext",
-    "target": "ESNext",
-    "esModuleInterop": true,
-    "moduleResolution": "node",
-    "types": ["react", "jest", "node", "trusted-types", "jest-extended"],
-    "paths": {
-      "development-sandbox": ["./test/lib/development-sandbox"],
-      "next-test-utils": ["./test/lib/next-test-utils"],
-      "amp-test-utils": ["./test/lib/amp-test-utils"],
-      "next-webdriver": ["./test/lib/next-webdriver"],
-      "e2e-utils": ["./test/lib/e2e-utils"],
-      "test-data-service/*": ["./test/lib/test-data-service/*"],
-      "test-log": ["./test/lib/test-log"]
-    }
-  }
-}
diff --git a/tsconfig.json b/tsconfig.json
index f35f67680c5c27..d7dc15ddb9469a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,5 +1,25 @@
 {
-  "extends": "./tsconfig.base.json",
-  "include": ["test/**/*.test.ts", "test/**/*.test.tsx"],
-  "exclude": ["node_modules"]
+  "compilerOptions": {
+    "allowJs": true,
+    "esModuleInterop": true,
+    "jsx": "react-jsx",
+    "module": "esnext",
+    "moduleResolution": "node",
+    "noEmit": true,
+    "noUnusedLocals": true,
+    "paths": {
+      "amp-test-utils": ["./test/lib/amp-test-utils"],
+      "development-sandbox": ["./test/lib/development-sandbox"],
+      "e2e-utils": ["./test/lib/e2e-utils"],
+      "next-test-utils": ["./test/lib/next-test-utils"],
+      "next-webdriver": ["./test/lib/next-webdriver"],
+      "test-data-service/*": ["./test/lib/test-data-service/*"],
+      "test-log": ["./test/lib/test-log"]
+    },
+    "resolveJsonModule": true,
+    "strict": false,
+    "target": "ESNext",
+    "types": ["react", "jest", "node", "trusted-types", "jest-extended"]
+  },
+  "include": ["test/**/*.test.ts", "test/**/*.test.tsx"]
 }