--- a/app/models/tdm/test_case_execution.rb
+++ b/app/models/tdm/test_case_execution.rb
@@ -19,13 +19,12 @@
   validates_numericality_of :exit_code, :only_integer => true
   validates_numericality_of :time, :only_integer => true
   validates_inclusion_of :result, :in => %w( SUCCESS FAILURE OVERTIME )
-  validates_non_presence_of :result_explanation, :if => Proc.new {|o| o.result == 'SUCCESS'}
   validates_not_null :output
   validates_positiveness_of :time
 
   belongs_to :test_case
   has_params :statistics
-  has_params :numerical_statistics
+  has_params :num_stats
 
   after_save :update_output