ESTestCaseTests#testBasePortGradle failed

[nik9000]

Build scan:
scan

Repro line:

./gradlew ':test:framework:test' --tests "org.elasticsearch.test.test.ESTestCaseTests.testBasePortGradle" -Dtests.seed=92562F59F82C1285 -Dtests.security.manager=true -Dtests.locale=ga -Dtests.timezone=Asia/Makassar -Druntime.java=11

Reproduces locally?: Not for me!

Applicable branches: 7.x and master

Failure history:
started June 13th

Failure excerpt:

java.lang.AssertionError: Values should be different. Actual: 10300
...
t org.elasticsearch.test.test.ESTestCaseTests.testBasePortGradle(ESTestCaseTests.java:195)
...

[elasticmachine]

Pinging @elastic/es-core-infra (:Core/Infra/Build)