I have test failures, is master the correct branch to build from?

[Luke B]

Hi
I cloned git at github.com:openjdk/jdk.git followed the build instructions and
was able to build the JDK on master, however when I ran:

make run-test-tier1

some of the tests failed:

==============================
Test summary
==============================
   TEST                                              TOTAL  PASS  FAIL
ERROR
>> jtreg:test/hotspot/jtreg:tier1                     1728  1721     7
0 <<
   jtreg:test/jdk:tier1                               2026  2026     0
0
   jtreg:test/langtools:tier1                         4167  4167     0
0
   jtreg:test/jaxp:tier1                                 0     0     0
0
   jtreg:test/lib-test:tier1                             0     0     0
0
==============================
TEST FAILURE

Looking in the report.html for the hotspot tests I see:
"native" failed 7 tests and "bug8251158 native" failed 2 tests.

This is running this on ubuntu 18.04.5

Is this expected, am I building the wrong branch? If not do I need to
install something to get those tests passing?

Should I be applying a ProblemList.txt, if so which one and how should that
be run? Perhaps I need to call jtreg directly rather than via make?

many thanks,
-Luke