EWS might mark jsc test build as successful in certain conditions if jsc tests fail to run due to some infrastructure issue (e.g.: test hanging). For e.g. in https://ews-build.webkit.org/#/builders/45/builds/1431 tests didn't run due to an infrastructure issue. However the build was marked successful.
<rdar://problem/72229068>
*** This bug has been marked as a duplicate of bug 229634 ***