When executing the angular test unit of a message ErrorEvent object

I have several crash tests that just leave [ErrorEvent object] posted. I do not see anything on the console that helps me make the code offensive. But not [FIT] in the test, it passes. Is there something I need to track this down? Or solve this?

"karma": "3.1.1", "karma-chrome-launcher": "2.2.0", "karma-coverage-istanbul-reporter": "2.0.1", "karma-jasmine": "1.1.2", "karma-jasmine-html-reporter": "0.2.2", "karma-junit-reporter": "1.2.0", "karma-parallel": "0.3.1",

commands already executed: ng test --code-coverage, ng test --source-map=false