diff --git a/test/cli/external-modules-auto-global/_config.js b/test/cli/external-modules-auto-global/_config.js
new file mode 100644
index 0000000..7dbf418
--- /dev/null
+++ b/test/cli/external-modules-auto-global/_config.js
@@ -0,0 +1,7 @@
+const assert = require( 'assert' );
+
+module.exports = {
+	description: 'populates options.external with --global keys',
+	command: 'rollup main.js --format iife --globals mathematics:Math',
+	execute: true
+};
diff --git a/test/cli/external-modules-auto-global/main.js b/test/cli/external-modules-auto-global/main.js
new file mode 100644
index 0000000..dcd8569
--- /dev/null
+++ b/test/cli/external-modules-auto-global/main.js
@@ -0,0 +1,3 @@
+import { max } from 'mathematics';
+
+assert.equal( max( 1, 2, 3 ), 3 );