diff --git a/package/__tests__/development.js b/package/__tests__/development.js
index bd1f1e8e1..0de25d672 100644
--- a/package/__tests__/development.js
+++ b/package/__tests__/development.js
@@ -6,6 +6,10 @@ const { chdirTestApp, chdirCwd } = require('../utils/helpers')
 chdirTestApp()
 
 describe('Development environment', () => {
+  beforeEach(() => {
+    jest.resetModules()
+  })
+
   afterAll(chdirCwd)
 
   describe('toWebpackConfig', () => {
diff --git a/package/__tests__/production.js b/package/__tests__/production.js
index 96f212817..9fcf57fe5 100644
--- a/package/__tests__/production.js
+++ b/package/__tests__/production.js
@@ -6,6 +6,10 @@ const { chdirTestApp, chdirCwd } = require('../utils/helpers')
 chdirTestApp()
 
 describe('Production environment', () => {
+  beforeEach(() => {
+    jest.resetModules();
+  })
+
   afterAll(chdirCwd)
 
   describe('toWebpackConfig', () => {
@@ -13,6 +17,7 @@ describe('Production environment', () => {
 
     test('should use production config and environment', () => {
       process.env.RAILS_ENV = 'production'
+      process.env.NODE_ENV = 'production'
       const { environment } = require('../index')
 
       const config = environment.toWebpackConfig()
diff --git a/package/__tests__/staging.js b/package/__tests__/staging.js
index 794e61553..d7a39326d 100644
--- a/package/__tests__/staging.js
+++ b/package/__tests__/staging.js
@@ -6,6 +6,10 @@ const { chdirTestApp, chdirCwd } = require('../utils/helpers')
 chdirTestApp()
 
 describe('Custom environment', () => {
+  beforeEach(() => {
+    jest.resetModules()
+  })
+
   afterAll(chdirCwd)
 
   describe('toWebpackConfig', () => {
@@ -13,6 +17,7 @@ describe('Custom environment', () => {
 
     test('should use staging config and production environment', () => {
       process.env.RAILS_ENV = 'staging'
+      process.env.NODE_ENV = 'staging'
       const { environment } = require('../index')
 
       const config = environment.toWebpackConfig()
diff --git a/package/__tests__/test.js b/package/__tests__/test.js
index 4fa6cbff0..af5ff9ae1 100644
--- a/package/__tests__/test.js
+++ b/package/__tests__/test.js
@@ -6,6 +6,10 @@ const { chdirTestApp, chdirCwd } = require('../utils/helpers')
 chdirTestApp()
 
 describe('Test environment', () => {
+  beforeEach(() => {
+    jest.resetModules()
+  })
+
   afterAll(chdirCwd)
 
   describe('toWebpackConfig', () => {
@@ -13,6 +17,7 @@ describe('Test environment', () => {
 
     test('should use test config and production environment', () => {
       process.env.RAILS_ENV = 'test'
+      process.env.NODE_ENV = 'test'
       const { environment } = require('../index')
 
       const config = environment.toWebpackConfig()
diff --git a/package/env.js b/package/env.js
index 494922d62..ae7181690 100644
--- a/package/env.js
+++ b/package/env.js
@@ -2,7 +2,7 @@ const { resolve } = require('path')
 const { safeLoad } = require('js-yaml')
 const { readFileSync } = require('fs')
 
-const NODE_ENVIRONMENTS = ['development', 'production']
+const NODE_ENVIRONMENTS = ['development', 'test', 'production']
 const DEFAULT = 'production'
 const configPath = resolve('config', 'webpacker.yml')