using <logback.version>1.1.2</logback.version>
and <logback.audit.version>0.6</logback.audit.version>
in a single project I see the following error:

java.lang.NoClassDefFoundError: ch/qos/logback/core/joran/spi/Pattern
at ch.qos.logback.audit.client.joran.JoranConfigurator.addInstanceRules(JoranConfigurator.java:38)
at ch.qos.logback.core.joran.GenericConfigurator.buildInterpreter(GenericConfigurator.java:116)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:146)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:135)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:99)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:49)
at ch.qos.logback.audit.client.AuditorFactory.configureByResource(AuditorFactory.java:128)
at com.monitise.mvp.common.auditing.MvpAuditProcessorImpl.writeToAuditLog(MvpAuditProcessorImpl.java:95)
at com.monitise.mvp.common.auditing.MvpAuditProcessorImpl.auditMessage(MvpAuditProcessorImpl.java:65)
at com.monitise.mvp.common.auditing.MvpAbstractAuditor.audit(MvpAbstractAuditor.java:39)
at com.monitise.mvp.common.aspect.AuditorAspectTest.auditMethod_aroundBody1$advice(AuditorAspectTest.java:44)
at com.monitise.mvp.common.aspect.AuditorAspectTest.auditMethod(AuditorAspectTest.java:1)
at com.monitise.mvp.common.aspect.AuditorAspectTest.test(AuditorAspectTest.java:51)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassNotFoundException: ch.qos.logback.core.joran.spi.Pattern
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 37 more

I believe this is because the Pattern class is part of the 0.9 version of logback-core and the name was changed in later versions. I tried creating a facade for the Pattern class but issues in other transitive dependencies then started showing up.