diff --git a/test/integration.test.js b/test/integration.test.js
index ed9d323..29003f4 100644
--- a/test/integration.test.js
+++ b/test/integration.test.js
@@ -26,6 +26,12 @@ test('integration', (t) => {
 
   root = parse('1 / -1');
   t.is(root.nodes.length, 3);
+
+  root = parse('1em/var(--line-height)');
+  t.is(root.nodes.length, 3);
+
+  root = parse('1em / var(--line-height)');
+  t.is(root.nodes.length, 3);
 });
 
 test('manipulation', (t) => {