jbpm-test artifact is not present in BRMS 5.3 build. In particular I need to use assertion methods (for example getVariableValue) from file JbpmJUnitTestCase.java. https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/test/java/org/jbpm/bpmn2/JbpmJUnitTestCase.java
Fixed in dev6. Please check this on brms dev6 distribution.
Thanks, Ryan.