diff --git a/rollup.test.js b/rollup.test.js
index <HASH>..<HASH> 100644
--- a/rollup.test.js
+++ b/rollup.test.js
@@ -1,9 +1,11 @@
 import istanbul from 'rollup-plugin-istanbul';
 import node from 'rollup-preset-node';
+import pkg from './package.json';
 
 export default {
+	external: Object.keys(pkg.dependencies),
 	output: {
-		format: 'umd',
+		format: 'iife',
 		name: 'test',
 	},
 	plugins: [
Add externals to rollup test config