diff --git a/src/protocol/serializers.ts b/src/protocol/serializers.ts
index a324bb30c9..e48e180d45 100644
--- a/src/protocol/serializers.ts
+++ b/src/protocol/serializers.ts
@@ -151,5 +151,5 @@ function isDate(obj: any): obj is Date {
 }
 
 function isError(obj: any): obj is Error {
-  return obj instanceof Error || (obj && obj.__proto__ && obj.__proto__.name === 'Error');
+  return obj instanceof Error || obj?.__proto__?.name === 'Error' || (obj?.__proto__ && isError(obj.__proto__));
 }