Apply suggestion from @marcphilipp

Co-authored-by: Marc Philipp <[email protected]>

Author: laeubi

junit-platform-reporting/src/main/java/org/junit/platform/reporting/open/xml/OpenTestReportGeneratingListener.java

@@ -147,7 +147,7 @@ public void testPlanExecutionStarted(TestPlan testPlan) {
 
 	private DocumentWriter<Events> createDocumentWriter(ConfigurationParameters config,
 			NamespaceRegistry namespaceRegistry) throws Exception {
-		return config.get(SOCKET_PROPERTY_NAME) //
+		return config.get(SOCKET_PROPERTY_NAME, Integer::valueOf) //
 				.map(portString -> {
 					try {
 						int port = Integer.parseInt(portString);