The test passes, but then fails in timeout.
Maybe the test timeout should be adjusted?

[...]
For key: checkValidity succeeded. target: ksf result: jre's: null providers: null jre-preferred: false
variantFallbackTest() succeeded.
----------System.err:(1/16)----------
STATUS:Passed.
----------rerun:(53/7786)*----------
[...]
result: Error. Program `c:\...\jdk-25+21-2527\windows-x64-debug.jdk\jdk-25\fastdebug\bin\java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 556638ms).