fix(test): downgrade jest to 23

azure-pipelines.yml

@@ -24,7 +24,7 @@ steps:
   displayName: 'Test: Build Fixtures'
 
 - script: |
-    set JEST_JUNIT_OUTPUT=test-unit-junit.xml && set NODE_OPTIONS=--max_old_space_size=4096 && yarn test:unit -i
+    set JEST_JUNIT_OUTPUT=test-unit-junit.xml && set NODE_OPTIONS=--max_old_space_size=4096 && yarn test:unit -w=2
   displayName: 'Test: Run unit tests'
 
 - task: PublishTestResults@2

jest.config.js

@@ -9,7 +9,8 @@ module.exports = {
   // But its performance overhead is pretty bad (30+%).
   // detectOpenHandles: true
 
-  setupFilesAfterEnv: ['./test/utils/setup'],
+  // setupFilesAfterEnv: ['./test/utils/setup'],
+  setupTestFrameworkScriptFile: './test/utils/setup',
 
   coverageDirectory: './coverage',
 

package.json

@@ -30,7 +30,7 @@
     "@nuxtjs/eslint-config": "^0.0.1",
     "babel-core": "^7.0.0-bridge",
     "babel-eslint": "^10.0.1",
-    "babel-jest": "^24.0.0",
+    "babel-jest": "^23.6.0",
     "babel-plugin-dynamic-import-node": "^2.2.0",
     "cheerio": "^1.0.0-rc.2",
     "codecov": "^3.1.0",
@@ -53,7 +53,7 @@
     "fs-extra": "^7.0.1",
     "get-port": "^4.1.0",
     "glob": "^7.1.3",
-    "jest": "^24.0.0",
+    "jest": "^23.6.0",
     "jest-junit": "^6.1.0",
     "jsdom": "^13.2.0",
     "klaw-sync": "^6.0.0",