diff --git a/src/spectator/formatting/match_data_value_pair.cr b/src/spectator/formatting/match_data_value_pair.cr
index 4e9a56e..c9cc3f6 100644
--- a/src/spectator/formatting/match_data_value_pair.cr
+++ b/src/spectator/formatting/match_data_value_pair.cr
@@ -9,7 +9,7 @@ module Spectator::Formatting
     def to_s(io)
       io << @key
       io << ": "
-      io << @value
+      @value.inspect(io)
     end
   end
 end