diff --git a/lib/regexp-examples/groups.rb b/lib/regexp-examples/groups.rb
index cf448f3..4f858c6 100644
--- a/lib/regexp-examples/groups.rb
+++ b/lib/regexp-examples/groups.rb
@@ -184,6 +184,7 @@ def result_by_method(method)
         .map do |result|
           GroupResult.new(result)
         end
+        .uniq
     end
 
     def merge_if_orgroup(repeaters)