diff --git a/app/views/homework_common/programing_test.js.erb b/app/views/homework_common/programing_test.js.erb
index a42c8c998..d1643329b 100644
--- a/app/views/homework_common/programing_test.js.erb
+++ b/app/views/homework_common/programing_test.js.erb
@@ -3,7 +3,9 @@ $("#test_result_<%= @index%>").val("<%= @result%>");
 <% if @err_msg || @result != 0%>
     $("#homework_work_test_show").show();
     $("#homework_work_test_desc").text("<%= escape_javascript(@err_msg || status_to_err_msg(@result))%>");
-    $("#homework_test_error_msg").val("<%= escape_javascript(@err_msg)%>");
+    <% if @err_msg%>
+        $("#homework_test_error_msg").val("<%= escape_javascript(@err_msg)%>");
+    <% end%>
 <% else%>
     $("#homework_work_test_show").hide();
     $("#homework_test_error_msg").val("");