diff --git a/src/spectator/matchers/dummy_match_data.cr b/src/spectator/matchers/dummy_match_data.cr
index 175cf53..4a6a693 100644
--- a/src/spectator/matchers/dummy_match_data.cr
+++ b/src/spectator/matchers/dummy_match_data.cr
@@ -15,7 +15,7 @@ module Spectator::Matchers
     # Dummy values.
     def named_tuple
       {
-        you: "shouldn't be calling this."
+        you: "shouldn't be calling this.",
       }
     end