camel-xslt-saxon: XsltAggregationStrategyTest fails with removing the log definition

from("file:src/test/resources/org/apache/camel/util/toolbox?noop=true&sortBy=file:name&antInclude=*.xml")
        .routeId("route1").noAutoStartup()
        .aggregate(new XsltSaxonAggregationStrategy("org/apache/camel/util/toolbox/aggregate.xsl"))
        .constant(true)
        .completionFromBatchConsumer()
        //.log("after aggregate body: ${body}")
        .to("mock:transformed");