From 6a75b6cafb9e3adfd5b575f3a09cd74ff3352b4d Mon Sep 17 00:00:00 2001
From: Colin Rotherham <work@colinr.com>
Date: Mon, 26 Jun 2023 09:53:37 +0100
Subject: [PATCH] Babel transform only `*.mjs` files for Jest
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We don’t need to transform `*.js` files as they’re typically supported by Jest already, but we’ll add another commit to handle some exceptions
---
 jest.config.mjs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/jest.config.mjs b/jest.config.mjs
index f91f489a2b..fd16677d0c 100644
--- a/jest.config.mjs
+++ b/jest.config.mjs
@@ -32,10 +32,10 @@ const config = {
    */
   testEnvironment: 'jest-environment-node-single-context',
 
-  // Enable Babel transforms until Jest supports ESM
+  // Enable Babel transforms until Jest supports ESM and `import()`
   // See: https://jestjs.io/docs/ecmascript-modules
   transform: {
-    '^.+\\.m?js$': ['babel-jest', { rootMode: 'upward' }]
+    '^.+\\.mjs$': ['babel-jest', { rootMode: 'upward' }]
   },
 
   // Enable Babel transforms for ESM-only node_modules