diff --git a/lib/rubocop/cop/style/redundant_string_escape.rb b/lib/rubocop/cop/style/redundant_string_escape.rb
index 9f345be5f3c9..d148c41f28bd 100644
--- a/lib/rubocop/cop/style/redundant_string_escape.rb
+++ b/lib/rubocop/cop/style/redundant_string_escape.rb
@@ -50,7 +50,7 @@ def on_str(node)
           each_match_range(str_contents_range, /(\\.)/) do |range|
             next if allowed_escape?(node, range.resize(3))
 
-            add_offense(range, message: format(MSG, char: range.source.chars.last)) do |corrector|
+            add_offense(range) do |corrector|
               corrector.remove_leading(range, 1)
             end
           end
@@ -58,6 +58,10 @@ def on_str(node)
 
         private
 
+        def message(range)
+          format(MSG, char: range.source.chars.last)
+        end
+
         def str_contents_range(node)
           if heredoc?(node)
             node.loc.heredoc_body