Option to don't kill the entire testrun when an assertion fails

[Walom]

Is there an existing option to don't stop the entire test execution when an assertion fails, and instead just flag it as "Failed assertion" and continue the test execution? Or how much effort would require to add it? I've been tinkering with it (I got it to make a full list at the end of all the tests that failed and print their details), and looks like a straightforward change, but i don't quite understand the section where i need to make this change.