diff --git a/app/models/group.rb b/app/models/group.rb
index 03ca4b3ba..fa6b46fff 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -51,6 +51,10 @@ class Group < Principal
     end
   end
 
+  def self.human_attribute_name(attribute_key_name, *args)
+    attribute_key_name == 'lastname' ? l(:field_name) : super
+  end
+
   private
 
   # Removes references that are not handled by associations
diff --git a/test/unit/group_test.rb b/test/unit/group_test.rb
index 8ce032dfa..2aecc578a 100644
--- a/test/unit/group_test.rb
+++ b/test/unit/group_test.rb
@@ -33,6 +33,12 @@ class GroupTest < ActiveSupport::TestCase
     assert g.save
   end
 
+  def test_blank_name_error_message
+    g = Group.new
+    assert !g.save
+    assert_include "Name can't be blank", g.errors.full_messages
+  end
+
   def test_roles_given_to_new_user
     group = Group.find(11)
     user = User.find(9)