diff --git a/e2e/utils/runHaul.ts b/e2e/utils/runHaul.ts
index 7a7b19c3..4a47f11b 100644
--- a/e2e/utils/runHaul.ts
+++ b/e2e/utils/runHaul.ts
@@ -22,6 +22,14 @@ type RunHaulOptions = {
   skipPkgJsonCheck?: boolean; // don't complain if can't find package.json
 };
 
+function getEnv(options: RunHaulOptions) {
+  return {
+    ...process.env,
+    ...(options.nodePath ? { NODE_PATH: options.nodePath } : {}),
+    NODE_ENV: 'development',
+  };
+}
+
 export function runHaulSync(
   dir: string,
   args?: Array<string>,
@@ -34,13 +42,9 @@ export function runHaulSync(
     cwd = path.resolve(__dirname, cwd);
   }
 
-  const env = options.nodePath
-    ? Object.assign({}, process.env, { NODE_PATH: options.nodePath })
-    : process.env;
-
   const result = spawnSync(NYC_BIN, [...NYC_ARGS, BIN_PATH, ...(args || [])], {
     cwd,
-    env,
+    env: getEnv(options),
   });
 
   return {
@@ -62,9 +66,8 @@ export function runHaul(
     cwd = path.resolve(__dirname, cwd);
   }
 
-  const env = options.nodePath
-    ? Object.assign({}, process.env, { NODE_PATH: options.nodePath })
-    : process.env;
-
-  return spawn(NYC_BIN, [...NYC_ARGS, BIN_PATH, ...(args || [])], { cwd, env });
+  return spawn(NYC_BIN, [...NYC_ARGS, BIN_PATH, ...(args || [])], {
+    cwd,
+    env: getEnv(options),
+  });
 }
diff --git a/fixtures/react_native_windows_e2e_app/babel.config.js b/fixtures/react_native_windows_e2e_app/babel.config.js
index d470cfc5..b316e233 100755
--- a/fixtures/react_native_windows_e2e_app/babel.config.js
+++ b/fixtures/react_native_windows_e2e_app/babel.config.js
@@ -1,9 +1,3 @@
 module.exports = {
   presets: [['module:../../packages/haul-babel-preset-react-native', { chakra: true }]],
-  overrides: [
-    {
-      test: /__tests__/,
-      plugins: [['@babel/plugin-transform-modules-commonjs', { allowTopLevelThis: true }]]
-    }
-  ]
 };
diff --git a/packages/haul-babel-preset-react-native/src/index.ts b/packages/haul-babel-preset-react-native/src/index.ts
index c4b58f90..4d0bf53b 100644
--- a/packages/haul-babel-preset-react-native/src/index.ts
+++ b/packages/haul-babel-preset-react-native/src/index.ts
@@ -27,6 +27,11 @@ const chakraPlugins = [
   [require('@babel/plugin-proposal-object-rest-spread')],
 ];
 
+const commonJsPlugin = [
+  require('@babel/plugin-transform-modules-commonjs'),
+  { allowTopLevelThis: true },
+];
+
 function isTypeScriptSource(fileName: string) {
   return !!fileName && fileName.endsWith('.ts');
 }
@@ -45,6 +50,12 @@ export default function getHaulBabelPreset(
 ) {
   return {
     compact: false,
+    env: {
+      // Add CommonJS transform when running in NODE_ENV === test, for example when testing.
+      test: {
+        plugins: [commonJsPlugin],
+      },
+    },
     overrides: [
       // The flow strip types plugin must go BEFORE class properties!
       {
@@ -67,12 +78,7 @@ export default function getHaulBabelPreset(
       },
       {
         test: isReactNative,
-        plugins: [
-          [
-            require('@babel/plugin-transform-modules-commonjs'),
-            { allowTopLevelThis: true },
-          ],
-        ],
+        plugins: [commonJsPlugin],
       },
       {
         test: isTypeScriptSource,
diff --git a/packages/haul-ram-bundle-webpack-plugin/src/__tests__/integration.test.ts b/packages/haul-ram-bundle-webpack-plugin/src/__tests__/integration.test.ts
index d379b30f..3f3464d3 100644
--- a/packages/haul-ram-bundle-webpack-plugin/src/__tests__/integration.test.ts
+++ b/packages/haul-ram-bundle-webpack-plugin/src/__tests__/integration.test.ts
@@ -42,6 +42,7 @@ function build({
             options: {
               babelrc: false,
               configFile: false,
+              envName: 'development',
               presets: ['module:@haul-bundler/babel-preset-react-native'],
             },
           },