Couple of tests started to fail on my machine recently.
TcpTest

----------System.out:(10/306)----------
Local Addresses
/192.168.1.27
/fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0
Test1: OK
server bound to /192.168.1.27:0
connecting to /fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0
binding to /[fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0]:0
connecting to /192.168.1.27
Test2: OK
checkTime: got = 7522 start = 5000 end = 5000
----------System.err:(13/668)----------
java.lang.RuntimeException: checkTime failed: got 7522, expected between 5000 and 5000
at Tests.checkTime(Tests.java:164)
at Tests.checkTime(Tests.java:155)
at TcpTest.test3(TcpTest.java:202)
at TcpTest.main(TcpTest.java:76)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:312)
at java.base/java.lang.Thread.run(Thread.java:828)


UdpTest

----------System.out:(17/600)----------
Local Addresses
/192.168.1.27
/fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0
Test1 starting
dest1 = /192.168.1.27:54924
dest2 = /192.168.1.27:54925
dest1 = /[fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0]:54926
dest2 = /[fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0]:54927
dest1 = /[fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0]:54928
dest2 = /[fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0]:54929
dest1 = /[fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0]:54930
dest2 = /192.168.1.27:54931
dest2 = /[fe80:0:0:0:18a8:119d:4bf9:d1ae%eth0]:54932
dest2 = /192.168.1.27:54932
Test1: OK
Test2 starting
checkTime: got = 6006 start = 4000 end = 4000
----------System.err:(13/668)----------
java.lang.RuntimeException: checkTime failed: got 6006, expected between 4000 and 4000
at Tests.checkTime(Tests.java:164)
at Tests.checkTime(Tests.java:155)
at UdpTest.test2(UdpTest.java:147)
at UdpTest.main(UdpTest.java:88)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:312)
at java.base/java.lang.Thread.run(Thread.java:828)