Is parallel test execution supported?

[PunchyRascal]

I am trying to run tests in parallel with

testImplementation("io.camunda.spring:spring-boot-starter-camunda-test:8.4.0")

And am running into errors when running tests in parallel (classes are parallel, tests single thread):

java.lang.RuntimeException: Cannot invoke public abstract io.camunda.zeebe.client.api.command.PublishMessageCommandStep1 
io.camunda.zeebe.client.ZeebeClient.newPublishMessageCommand() 
on ZeebeClient, as ZeebeClient is currently not initialized. Maybe you run outside of a testcase?

(I am not running out of a testcase)

On their own or when run not in parallel the tests pass.

In previous version (1.3.4) parallel tests worked.

I am also struggling finding the appropriate repository for this package, because search does not seem to find it and links in Maven return 404, so I apologize if this belongs somewhere else.