diff --git a/test/functional/repositories_mercurial_controller_test.rb b/test/functional/repositories_mercurial_controller_test.rb
index 219082828d..f784d049dc 100644
--- a/test/functional/repositories_mercurial_controller_test.rb
+++ b/test/functional/repositories_mercurial_controller_test.rb
@@ -34,7 +34,7 @@ class RepositoriesMercurialControllerTest < ActionController::TestCase
     User.current = nil
     @repository = Repository::Mercurial.create(:project => Project.find(3), :url => REPOSITORY_PATH)
     assert @repository
-    @diff_c_support = @repository.scm.class.client_version_above?([1, 2])
+    @diff_c_support = true
   end
 
   if File.directory?(REPOSITORY_PATH)
diff --git a/test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb b/test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb
index e38c31ab18..d2202f735b 100644
--- a/test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb
+++ b/test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb
@@ -13,7 +13,7 @@ begin
     if File.directory?(REPOSITORY_PATH)
       def setup
         @adapter = Redmine::Scm::Adapters::MercurialAdapter.new(REPOSITORY_PATH)
-        @diff_c_support = @adapter.class.client_version_above?([1, 2])
+        @diff_c_support = true
       end
 
       def test_hgversion