From fee16ddbb7196cfafb82e27d9e1fa5ad5f4fd894 Mon Sep 17 00:00:00 2001
From: Simen Bekkhus <sbekkhus91@gmail.com>
Date: Sun, 24 Feb 2019 16:37:39 +0100
Subject: [PATCH] tweak

---
 packages/jest-config/src/normalize.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/jest-config/src/normalize.ts b/packages/jest-config/src/normalize.ts
index 5b08fe8afb35..1c7653d3a57f 100644
--- a/packages/jest-config/src/normalize.ts
+++ b/packages/jest-config/src/normalize.ts
@@ -48,7 +48,10 @@ const createConfigError = (message: string) =>
 const mergeOptionWithPreset = (
   options: Config.InitialOptions,
   preset: Config.InitialOptions,
-  optionName: 'moduleNameMapper' | 'transform',
+  optionName: keyof Pick<
+    Config.InitialOptions,
+    'moduleNameMapper' | 'transform'
+  >,
 ) => {
   if (options[optionName] && preset[optionName]) {
     options[optionName] = {