The junit.jar file is set by default relative to the JUNIT_HOME environment variable, e.g. ${sysenv.JUNIT_HOME}/junit.jar. To override the location/naming of the junit.jar file, a new system property JUNIT_JAR is available for this purpose. If the JUNIT_JAR system property is set, this will take precedence over the default. An example of its usage (e.g. Microsoft Windows): set JUNIT_JAR = c:\junit-4.8.jar