From 8f9279311937f5f6c6b7da4539091c19fde49ab4 Mon Sep 17 00:00:00 2001
From: Dan Abramov <gaearon@fb.com>
Date: Fri, 19 May 2017 17:00:56 +0100
Subject: [PATCH] Ignore .env.local in test environment

---
 packages/react-scripts/config/env.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/packages/react-scripts/config/env.js b/packages/react-scripts/config/env.js
index 726db48ab5b..937076b52ba 100644
--- a/packages/react-scripts/config/env.js
+++ b/packages/react-scripts/config/env.js
@@ -27,9 +27,13 @@ if (!NODE_ENV) {
 var dotenvFiles = [
   `${paths.dotenv}.${NODE_ENV}.local`,
   `${paths.dotenv}.${NODE_ENV}`,
-  `${paths.dotenv}.local`,
+  // Don't include `.env.local` for `test` environment
+  // since normally you expect tests to produce the same
+  // results for everyone
+  NODE_ENV !== 'test' && `${paths.dotenv}.local`,
   paths.dotenv,
-];
+].filter(Boolean);
+
 // Load environment variables from .env* files. Suppress warnings using silent
 // if this file is missing. dotenv will never modify any environment variables
 // that have already been set.