JaCoCo: test files not considered

[CCFenner]

In the sonar scanner log I see the messages

INFO: Sensor Groovy JaCoCo [groovy]
...
WARN: File not found: util/JenkinsErrorRule.groovy
WARN: File not found: util/BaseTest.groovy
WARN: File not found: steps/DeployTest.groovy

I run with the following settings:

sonar.sources=src,vars
sonar.tests=test

So the above files are located in the test folder but are not considered by JaCoCo. If I add the test folder from sonar.tests to sonar.sources the GroovySurefireSensor is complaining about it.

Is it correct that JaCoCo considers only files of Type.MAIN here and not also Type.TEST?