diff --git a/src/spectator/expectation.cr b/src/spectator/expectation.cr
index 4bec79d..1f72bb0 100644
--- a/src/spectator/expectation.cr
+++ b/src/spectator/expectation.cr
@@ -10,13 +10,13 @@ module Spectator
 
     def to(matcher : Matchers::Matcher)
       unless matcher.match?(self)
-        raise ExpectationFailed.new
+        raise ExpectationFailed.new(matcher.message(self))
       end
     end
 
     def to_not(matcher : Matchers::Matcher)
       if matcher.match?(self)
-        raise ExpectationFailed.new
+        raise ExpectationFailed.new(matcher.negated_message(self))
       end
     end
 
diff --git a/src/spectator/formatters/default_formatter.cr b/src/spectator/formatters/default_formatter.cr
index 370d569..7fbacdd 100644
--- a/src/spectator/formatters/default_formatter.cr
+++ b/src/spectator/formatters/default_formatter.cr
@@ -31,7 +31,7 @@ module Spectator
           puts "Failures:"
           puts
           failures.each_with_index do |failure, index|
-            display_failure(failure, index + 1)
+            display_failure(failure.as(FailedResult), index + 1)
           end
         end
       end
@@ -40,7 +40,7 @@ module Spectator
         expected = "TODO"
         actual   = "TODO"
         puts "  #{number}) #{failure.example}"
-        puts "     Failure: <INSERT EXPECTATION HERE>"
+        puts "     Failure: #{failure.error.message}"
         puts
         puts "       Expected: #{expected}"
         puts "            got: #{actual}"