diff --git a/test/compress/dead-code.js b/test/compress/dead-code.js
index 6be3a1f4..68ee4b12 100644
--- a/test/compress/dead-code.js
+++ b/test/compress/dead-code.js
@@ -859,6 +859,7 @@ issue_2666: {
 issue_2692: {
     options = {
         dead_code: true,
+        reduce_vars: false,
     }
     input: {
         function f(a) {