FAIL: WebSuite.test_js Traceback (most recent call last): File "/home/odoo/src/odoo/addons/web/tests/test_js.py", line 30, in test_js self.browser_js('/web/tests?mod=web', "", "", login='admin', timeout=1800, error_checker=qunit_error_checker) File "/home/odoo/src/odoo/odoo/tests/common.py", line 1746, in browser_js self.fail('%s\n\n%s' % (message, error)) AssertionError: Some js test failed 36 / 39478 tests failed.

unexpectedly the tests began to fail when building modules. why is it failing?