(INCOMPATIBLE CHANGE) The tycho-surefire property testSuite had been removed. If you are building a multi-bundle project and had set thetestSuite and testClass property on the CLI or in a parent pom, you have to set the property failIfNoTests to false. If you had specifiedtestSuite and testClass in the pom file of the plugin the testsClass belongs to, you just have to remove the testSuite property (bug 453526).
You should make sure your plugins will survive that change.