diff --git a/src/spectator/matchers/have_matcher.cr b/src/spectator/matchers/have_matcher.cr
index 6ac12bc..f8cd097 100644
--- a/src/spectator/matchers/have_matcher.cr
+++ b/src/spectator/matchers/have_matcher.cr
@@ -19,6 +19,7 @@ module Spectator::Matchers
     private def match_string?(actual_value)
       expected.value.all? do |item|
         actual_value.includes?(item)
+        actual_value.includes?(item) if item.is_a?(Char | String)
       end
     end