diff --git a/test/debug.test.js b/test/debug.test.js
index 189721bc16..ee9ad758c5 100644
--- a/test/debug.test.js
+++ b/test/debug.test.js
@@ -38,6 +38,17 @@ test('/test/error should return error stack trace (Youch)', async t => {
   t.true(error.includes('<div class="error-frames">'))
 })
 
+test('/test/error should return json format error (Youch)', async t => {
+  const opts = {
+    headers: {
+      'accept': 'application/json'
+    },
+    resolveWithFullResponse: true
+  }
+  const { response: { headers } } = await t.throws(rp(url('/test/error'), opts))
+  t.is(headers['content-type'], 'text/json; charset=utf-8')
+})
+
 // Close server and ask nuxt to stop listening to file changes
 test.after('Closing server and nuxt.js', t => {
   nuxt.close()
diff --git a/test/error.test.js b/test/error.test.js
index 96bea41a2f..c5f55469ec 100644
--- a/test/error.test.js
+++ b/test/error.test.js
@@ -1,5 +1,6 @@
 import test from 'ava'
 import { resolve } from 'path'
+import rp from 'request-promise-native'
 import { Nuxt, Builder } from '../index.js'
 
 const port = 4005
@@ -38,6 +39,17 @@ test('/ with renderAndGetWindow()', async t => {
   t.is(err.response.statusMessage, 'NuxtServerError')
 })
 
+test('/ with text/json content', async t => {
+  const opts = {
+    headers: {
+      'accept': 'application/json'
+    },
+    resolveWithFullResponse: true
+  }
+  const { response: { headers } } = await t.throws(rp(url('/'), opts))
+  t.is(headers['content-type'], 'text/json; charset=utf-8')
+})
+
 // Close server and ask nuxt to stop listening to file changes
 test.after('Closing server and nuxt.js', t => {
   nuxt.close()