diff --git a/test/unit/profile_test.rb b/test/unit/profile_test.rb
index 18c4c27..7e2762d 100644
--- a/test/unit/profile_test.rb
+++ b/test/unit/profile_test.rb
@@ -506,7 +506,7 @@ class ProfileTest < Test::Unit::TestCase
 
   should 'be able to add a block as extra data for index' do
     klass = Class.new(Profile)
-    result = mock
+    result = Object.new
     klass.extra_data_for_index do |obj|
       result
     end
--
libgit2 0.21.2