diff --git a/test/fixtures/custom-babelrc/.babelrc b/test/fixtures/custom-babelrc/.babelrc
index 81986a3..bc03013 100644
--- a/test/fixtures/custom-babelrc/.babelrc
+++ b/test/fixtures/custom-babelrc/.babelrc
@@ -6,6 +6,7 @@
 				"loose": true,
 				"modules": false,
 				"useBuiltIns": "usage",
+				"corejs": 2,
 				"targets": {
 					"esmodules": true
 				}