diff --git a/app/models/test_request.rb b/app/models/test_request.rb
--- a/app/models/test_request.rb
+++ b/app/models/test_request.rb
@@ -41,8 +41,9 @@
 
   protected
   def self.input_file_name(user,problem)
+    problem_name = (problem!=nil) ? problem.name : ""
     begin
-      tmpname = UPLOADED_INPUT_FILE_DIR + "/#{user.login}/#{problem.name}/#{rand(10000)}"
+      tmpname = TEST_REQUEST_INPUT_FILE_DIR + "/#{user.login}/#{problem_name}/#{rand(10000)}"
     end while File.exists?(tmpname)
     tmpname
   end
diff --git a/config/environment.rb b/config/environment.rb
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -59,4 +59,5 @@
 
 # Include your application configuration below
 
-UPLOADED_INPUT_FILE_DIR = RAILS_ROOT + '/upload'
+TEST_REQUEST_INPUT_FILE_DIR = RAILS_ROOT + '/data/test_request/input'
+TEST_REQUEST_OUTPUT_FILE_DIR = RAILS_ROOT + '/data/test_request/output'