From 3512f5726b8bbe8522bb1301a9b5646385dfc227 Mon Sep 17 00:00:00 2001
From: Michael Loughry <miclo@microsoft.com>
Date: Fri, 5 Apr 2019 12:13:45 -0700
Subject: [PATCH] Allow JSON transforms for #2578

---
 packages/jest-runtime/src/index.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/jest-runtime/src/index.ts b/packages/jest-runtime/src/index.ts
index 86e7115f9860..81e676968009 100644
--- a/packages/jest-runtime/src/index.ts
+++ b/packages/jest-runtime/src/index.ts
@@ -464,7 +464,11 @@ class Runtime {
     options: InternalModuleOptions | undefined,
     moduleRegistry: ModuleRegistry,
   ) {
-    if (path.extname(modulePath) === '.json') {
+    if (
+      path.extname(modulePath) === '.json' &&
+      options &&
+      options.isInternalModule
+    ) {
       localModule.exports = this._environment.global.JSON.parse(
         stripBOM(fs.readFileSync(modulePath, 'utf8')),
       );