utest and haxe: run one test case many times

This question is about Haxe language. I would like to use utest to run test classes. (http://ift.tt/1cvaGkt) I need to run each test case 1000 times.

code :

for (i in 0...1000)
runner.addCase(ts);
end for

This code raises an exception:

Exception in thread "main" Haxe Exception: invalid duplicated fixture result

Is it possible to run test cases many times using utest in Haxe?

Thank you in advance

best regards.