diff --git a/doc/RUNNING_TESTS b/doc/RUNNING_TESTS
index be3802dd9..cd216e07c 100644
--- a/doc/RUNNING_TESTS
+++ b/doc/RUNNING_TESTS
@@ -55,3 +55,6 @@ See: http://www.redmine.org/projects/redmine/wiki/Repositories_access_control_wi
 You need an empty repository accessible at http://127.0.0.1/svn/ecookbook
 Then, you can run the tests with:
 `ruby test\extra\redmine_pm\repository_subversion_test.rb`
+
+If you svn server is not running on localhost, you can use the REDMINE_TEST_DAV_SERVER
+environment variable to specify another host.