Forgot to add files :)

package.json

@@ -298,6 +298,7 @@
 		"@automattic/webpack-extensive-lodash-replacement-plugin": "file:./packages/webpack-extensive-lodash-replacement-plugin",
 		"@automattic/webpack-inline-constant-exports-plugin": "file:./packages/webpack-inline-constant-exports-plugin",
 		"@automattic/composite-checkout": "file:./packages/composite-checkout",
+		"@testing-library/react": "9.3.0",
 		"@types/classnames": "2.2.9",
 		"@types/debug": "4.1.4",
 		"@types/lodash": "4.14.144",

packages/composite-checkout/jest.config.js

@@ -1 +1,5 @@
-module.exports = { rootDir: __dirname, testMatch: [ '**/test/**/*.[jt]s?(x)' ] };
+module.exports = {
+	rootDir: __dirname,
+	testMatch: [ '**/test/**/*.[jt]s?(x)' ],
+	modulePathIgnorePatterns: [ 'enzyme-adapter.js' ],
+};

packages/composite-checkout/test/components/checkout-step.js

@@ -2,7 +2,7 @@
  * External dependencies
  */
 import React from 'react';
-import { shallow, mount } from '../enzyme-adapter';
+import { shallow } from '../enzyme-adapter';
 
 /**
  * Internal dependencies

packages/composite-checkout/test/components/checkout.js

@@ -28,10 +28,10 @@ test( 'When we enter checkout, the line items and total are rendered', () => {
 				amount: { currency: 'USD', value: 5500, displayValue: '$55' },
 			} }
 			onSuccess={ () => {
-				console.log( 'Success :)' );
+				return;
 			} }
 			onFailure={ () => {
-				console.log( 'Failure :(' );
+				return;
 			} }
 			successRedirectUrl="#"
 			failureRedirectUrl="#"