diff --git a/spec/13_input_output_spec.rb b/spec/13_input_output_spec.rb
index f31f8fbf..98bc956b 100644
--- a/spec/13_input_output_spec.rb
+++ b/spec/13_input_output_spec.rb
@@ -175,7 +175,7 @@
     end
   end
 
-  # It is unneccessary to write tests for methods that only contain puts
+  # It is unnecessary to write tests for methods that only contain puts
   # statements, like #final_message. Puts is a basic part of the standard
   # ruby library & is already well tested. Plus, most 'real world
   # applications' don't even output like this except to loggers.
diff --git a/spec_answers/13_input_output_answer.rb b/spec_answers/13_input_output_answer.rb
index 8d593905..c0bf3037 100644
--- a/spec_answers/13_input_output_answer.rb
+++ b/spec_answers/13_input_output_answer.rb
@@ -188,7 +188,7 @@
     end
   end
 
-  # It is unneccessary to write tests for methods that only contain puts
+  # It is unnecessary to write tests for methods that only contain puts
   # statements, like #final_message. Puts is a basic part of the standard
   # ruby library & is already well tested. Plus, most 'real world
   # applications' don't even output like this except to loggers.