execute with UI harness

test-plugins/org.yakindu.sct.model.stext.test/pom.xml

@@ -19,8 +19,8 @@
 				<artifactId>tycho-surefire-plugin</artifactId>
 				<version>${tycho-version}</version>
 				<configuration>
-					<useUIHarness>false</useUIHarness>
-					<useUIThread>false</useUIThread>
+					<useUIHarness>true</useUIHarness>
+					<useUIThread>true</useUIThread>
 					<testFailureIgnore>${testFailureIgnore}</testFailureIgnore>
 					<argLine>${test.vmargs}</argLine>
 				</configuration>