diff --git a/app/models/concerns/canonical_email.rb b/app/models/concerns/canonical_email.rb
index 0a1d94ebb1d..7dae59e52f6 100644
--- a/app/models/concerns/canonical_email.rb
+++ b/app/models/concerns/canonical_email.rb
@@ -4,18 +4,18 @@ module CanonicalEmail
   extend ActiveSupport::Concern
 
   class_methods do
-    def email_to_canonical_email_hash(str)
+    def email_to_canonical_email_hash(value)
       Digest::SHA2
         .new(256)
         .hexdigest(
-          email_to_canonical_email(str)
+          email_to_canonical_email(value)
         )
     end
 
     private
 
-    def email_to_canonical_email(str)
-      username, domain = str.downcase.split('@', 2)
+    def email_to_canonical_email(value)
+      username, domain = value.downcase.split('@', 2)
       username, = username.delete('.').split('+', 2)
 
       "#{username}@#{domain}"