diff --git a/spec/helpers/matchers_helper.cr b/spec/helpers/matchers_helper.cr
index 38f4d36..f620a2d 100644
--- a/spec/helpers/matchers_helper.cr
+++ b/spec/helpers/matchers_helper.cr
@@ -1,6 +1,6 @@
 # Retrieves a value from the `NamedTuple` returned by `Spectator::Matchers::MatchData#values`.
 def match_data_value(match_data, key)
-  puts typeof(match_data)
+  puts typeof(match_data.values)
   match_data.values.fetch(key) { raise "#{key} is missing" }
 end
 
@@ -8,7 +8,7 @@ end
 # from a `Spectator::Matchers::PrefixedValue`
 # in a `NamedTuple` returned by `Spectator::Matchers::MatchData#values`.
 def match_data_prefix(match_data, key)
-  puts typeof(match_data)
+  puts typeof(match_data.values)
   prefix = match_data.values.fetch(key) { raise "#{key} is missing" }
   if prefix.responds_to?(:value)
     {to_s: prefix.to_s, value: prefix.value}