diff --git a/test/fixtures/typescript/typescript.test.js b/test/fixtures/typescript/typescript.test.js
index 8591a68ad4..0d352b49dd 100644
--- a/test/fixtures/typescript/typescript.test.js
+++ b/test/fixtures/typescript/typescript.test.js
@@ -1,5 +1,3 @@
 import { buildFixture } from '../../utils/build'
 
-process.env.NUXT_TS = 'true'
 buildFixture('typescript')
-delete process.env.NUXT_TS
diff --git a/test/unit/typescript.modern.test.js b/test/unit/typescript.modern.test.js
index 5e0d4f2a5e..c313e43c20 100644
--- a/test/unit/typescript.modern.test.js
+++ b/test/unit/typescript.modern.test.js
@@ -7,11 +7,9 @@ describe('typescript modern', () => {
   let nuxt
 
   beforeAll(async () => {
-    process.env.NUXT_TS = 'true'
     const options = await loadFixture('typescript')
     nuxt = new Nuxt(Object.assign(options, { modern: true }))
     await new Builder(nuxt, BundleBuilder).build()
-    delete process.env.NUXT_TS
   })
 
   test('fork-ts-checker-webpack-plugin', () => {
diff --git a/test/unit/typescript.test.js b/test/unit/typescript.test.js
index d83c4971a8..7d015f55ee 100644
--- a/test/unit/typescript.test.js
+++ b/test/unit/typescript.test.js
@@ -6,9 +6,7 @@ describe('typescript', () => {
   const url = route => 'http://localhost:' + port + route
 
   beforeAll(async () => {
-    process.env.NUXT_TS = 'true'
     const options = await loadFixture('typescript')
-    delete process.env.NUXT_TS
     nuxt = new Nuxt(options)
     await nuxt.ready()
     port = await getPort()