[WARNING] The effective compiler target level 11 is incompatible with the following OSGi execution environments: [JavaSE-1.8 (assumes 1.8)] @ MavenProject: org.eclipse.reddeer:org.eclipse.reddeer.jface.test:3.3.0-SNAPSHOT @ /home/jenkins/agent/workspace/reddeer.staging.jdk11/tests/org.eclipse.reddeer.jface.test/pom.xml
And
22:32:33 [WARNING] Parameter 'useProjectSettings' is set to true, but preferences file '/home/jenkins/agent/workspace/reddeer.staging.jdk11/tests/org.eclipse.reddeer.jface.test/.settings/org.eclipse.jdt.core.prefs' could not be found!
And