Log4J and Spring

I just spent a half hour trying to increase the logging for a unit test that uses SpringJUnit4ClassRunner. First I thought I could just add a log4j.xml configuration file at the root of the classpath, but that didn't work. After looking around the Spring code a bit it dawned on me that I didn't even have log4j on the classpath for the project, so Commons Logging was using the standard java.util.logging package instead. I added log4j as a dependency to the project, and now log4j configuration works as expected.