smallrye-open-api: [inquiry] Failing Tests While Buiding 2.1.0-RC1 locally

I’ve been trying to build locally 2.1.0-RC1, but I’m facing issues with 2 or 4 tests failing (depending of JDK’s version) during SmallRye: MicroProfile OpenAPI TCK maven goal, any advise?

JDK8

Class	Method	Start	Time (ms)
Surefire suite
Surefire test — failed (configuration methods)
io.smallrye.openapi.tck.TestApplication	arquillianAfterSuite	1608145497440	56
org.eclipse.microprofile.openapi.tck.ModelConstructionTest	arquillianBeforeTest	1608145408944	1
org.eclipse.microprofile.openapi.tck.OASFactoryErrorTest	arquillianBeforeTest	1608145497302	0
Surefire test — failed
org.eclipse.microprofile.openapi.tck.OASFactoryErrorTest	customAbstractClassTest	1608145495888	1412

JDK11

Class	Method	Start	Time (ms)
Surefire suite
Surefire test — failed (configuration methods)
io.smallrye.openapi.tck.TestApplication	arquillianAfterSuite	1608136493988	21
org.eclipse.microprofile.openapi.tck.ModelConstructionTest	arquillianBeforeTest	1608136408466	1

Also, graphviz installation is part of the checks setup, wonder what is its utility during the build ? where is it being used ?

I noticed that microprofile-open-api GitHub checks are failing since Dec 07 1cf3a1d74, but I’m not 100% sure that could be the root cause for the failing tests, since the checks here have passed.

Thanks