diff --git a/packages/babel-register/test/index.js b/packages/babel-register/test/index.js
index eb1b93dad513..594787f2e513 100644
--- a/packages/babel-register/test/index.js
+++ b/packages/babel-register/test/index.js
@@ -37,7 +37,7 @@ jest.mock("source-map-support", () => {
 });
 
 const defaultOptions = {
-  exts: [".js", ".jsx", ".es6", ".es", ".mjs"],
+  exts: [".js", ".jsx", ".es6", ".es", ".mjs", ".cjs"],
   ignoreNodeModules: false,
 };