diff --git a/1-js/99-js-misc/01-proxy/01-error-nonexisting/solution.md b/1-js/99-js-misc/01-proxy/01-error-nonexisting/solution.md
index 64895853..357a5731 100644
--- a/1-js/99-js-misc/01-proxy/01-error-nonexisting/solution.md
+++ b/1-js/99-js-misc/01-proxy/01-error-nonexisting/solution.md
@@ -19,5 +19,5 @@ function wrap(target) {
 user = wrap(user);
 
 alert(user.name); // John
-alert(user.age); // ReferenceError: Property doesn't exist
+alert(user.age); // ReferenceError: Property doesn't exist "age"
 ```
diff --git a/1-js/99-js-misc/01-proxy/01-error-nonexisting/task.md b/1-js/99-js-misc/01-proxy/01-error-nonexisting/task.md
index f890256c..827cf35e 100644
--- a/1-js/99-js-misc/01-proxy/01-error-nonexisting/task.md
+++ b/1-js/99-js-misc/01-proxy/01-error-nonexisting/task.md
@@ -27,6 +27,6 @@ user = wrap(user);
 
 alert(user.name); // John
 *!*
-alert(user.age); // Error: Property doesn't exist
+alert(user.age); // ReferenceError: Property doesn't exist "age"
 */!*
 ```