diff --git a/app/models/create_enterprise.rb b/app/models/create_enterprise.rb
index a2a63d4..2521d19 100644
--- a/app/models/create_enterprise.rb
+++ b/app/models/create_enterprise.rb
@@ -16,13 +16,13 @@ class CreateEnterprise < Task
     settings_items field.to_sym
   end
 
-  # checks for virtual attributes 
+  # checks for virtual attributes
   validates_presence_of :name, :identifier
 
   #checks if the validation method is region to validates
   validates_presence_of :region_id, :if => lambda { |obj| obj.environment.organization_approval_method == :region }
 
-  validates_format_of :foundation_year, :with => /^\d*$/
+  validates_format_of :foundation_year, :with => /\d*/
 
   # checks for actual attributes
   validates_presence_of :requestor_id, :target_id
@@ -127,7 +127,7 @@ class CreateEnterprise < Task
     finish
   end
 
-  # tells if this request was appoved 
+  # tells if this request was appoved
   def approved?
     self.status == Task::Status::FINISHED
   end
diff --git a/app/models/domain.rb b/app/models/domain.rb
index a5fb478..052bd86 100644
--- a/app/models/domain.rb
+++ b/app/models/domain.rb
@@ -14,7 +14,7 @@ class Domain < ActiveRecord::Base
 
   # <tt>name</tt> must be sequences of alphanumeric characters (a to z,
   # 0 to 9), plus '_' or '-', separated by dots. Letters must be lowercase.
-  validates_format_of :name, :with => /^([a-z0-9_-]+\.)+[a-z0-9_-]+$/, :message => N_('{fn} must be composed of sequences of lowercase letters (a to z), numbers (0 to 9), "_" and "-", separated by dots.').fix_i18n
+  validates_format_of :name, :with => /([a-z0-9_-]+\.)+[a-z0-9_-]+/, :message => N_('{fn} must be composed of sequences of lowercase letters (a to z), numbers (0 to 9), "_" and "-", separated by dots.').fix_i18n
 
   # checks validations that could not be expressed using Rails' predefined
   # validations. In particular:
diff --git a/app/models/profile.rb b/app/models/profile.rb
index 7c5a0e9..81eb3bf 100644
--- a/app/models/profile.rb
+++ b/app/models/profile.rb
@@ -182,7 +182,7 @@ class Profile < ActiveRecord::Base
   validates_length_of :description, :maximum => 550, :allow_nil => true
 
   # Valid identifiers must match this format.
-  IDENTIFIER_FORMAT = /^#{Noosfero.identifier_format}$/
+  IDENTIFIER_FORMAT = /#{Noosfero.identifier_format}/
 
   # These names cannot be used as identifiers for Profiles
   RESERVED_IDENTIFIERS = %w[
diff --git a/app/models/rss_feed.rb b/app/models/rss_feed.rb
index 31ed89f..97dd9aa 100644
--- a/app/models/rss_feed.rb
+++ b/app/models/rss_feed.rb
@@ -14,7 +14,7 @@ class RssFeed < Article
 
   # store setting in body
   serialize :body, Hash
-  
+
   def body
     self[:body] ||= {}
   end
@@ -40,7 +40,7 @@ class RssFeed < Article
 
   # FIXME this should be validates_numericality_of, but Rails 2.0.2 does not
   # support validates_numericality_of with virtual attributes
-  validates_format_of :limit, :with => /^\d+$/, :if => :limit
+  validates_format_of :limit, :with => /\d+/, :if => :limit
 
   # determinates what to include in the feed. Possible values are +:all+
   # (include everything from the profile) and :parent_and_children (include
--
libgit2 0.21.2