diff --git a/tests/library/es.symbol.js b/tests/library/es.symbol.js
index cb4a3fd5bd02..3f3214d14112 100644
--- a/tests/library/es.symbol.js
+++ b/tests/library/es.symbol.js
@@ -108,6 +108,7 @@ if (JSON) {
     if (typeof Symbol() === 'symbol') {
       assert.strictEqual(JSON.stringify(Object(Symbol('symbol'))), '{}', 'boxed symbol');
     }
+    assert.strictEqual(JSON.stringify(undefined, () => 42), '42', 'replacer works with top-level undefined');
   });
 }
 
diff --git a/tests/tests/es.symbol.js b/tests/tests/es.symbol.js
index 80ac3d4bf132..713700cb03c8 100644
--- a/tests/tests/es.symbol.js
+++ b/tests/tests/es.symbol.js
@@ -128,6 +128,7 @@ if (JSON) {
     if (typeof Symbol() === 'symbol') {
       assert.strictEqual(JSON.stringify(Object(Symbol('symbol'))), '{}', 'boxed symbol');
     }
+    assert.strictEqual(JSON.stringify(undefined, () => 42), '42', 'replacer works with top-level undefined');
   });
 }