Index: trunk/build.xml
===================================================================
--- trunk/build.xml	(revision 17403)
+++ trunk/build.xml	(revision 17478)
@@ -445,4 +445,5 @@
 	                    <jvmarg value="-javaagent:${test.dir}/lib/jmockit.jar"/>
 	                    <jvmarg value="-Djunit.jupiter.extensions.autodetection.enabled=true"/>
+	                    <jvmarg value="-Djunit.jupiter.execution.parallel.enabled=true"/>
 	                    <jvmarg value="--add-modules" if:set="isJava9" unless:set="isJava11" />
 	                    <jvmarg value="java.activation,java.se.ee" if:set="isJava9" unless:set="isJava11" />