classesDirectory set in pom.xml is ignored

The configuration of classesDirectory in the surefire configuration in the pom is ignored. This bug is new in 2.2, everything worked fine with surefire 2.1.3.

Snippet from pom:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.2</version>
<inherited>true</inherited>
<configuration>
<forkMode>once</forkMode>
<reportFormat>xml</reportFormat>
<classesDirectory>${project.build.directory}/emma-classes</classesDirectory>
<printSummary>false</printSummary>
</configuration>
</plugin>

Debug output:

First, with surefire 2.1.3:

[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-surefire-plugin:2.1.3:test' -->
[DEBUG] (f) basedir = c:\example\server
[DEBUG] (f) childDelegation = true
[DEBUG] (f) classesDirectory = c:\example\server\target\emma-classes
[DEBUG] (f) classpathElements = [c:\example\server\target\classes, c:\example\server\target\test-classes, C:\WINDOWS\Profiles\butenuth\.m2\repository\emma\emma\2.0.5312\emma-2.0.5312.jar, C:\WINDOWS\Profiles\butenuth\.m2\repository\junit\junit\3.8.1\junit-3.8.1.jar, C:\WINDOWS\Profiles\butenuth\.m2\repository\de\sdm\calculator\interface\1.0-SNAPSHOT\interface-1.0-SNAPSHOT.jar]
[DEBUG] (f) forkMode = once
[DEBUG] (f) jvm = java
[DEBUG] (f) localRepository = [local] -> file://C:\WINDOWS\Profiles\butenuth\.m2\repository
[DEBUG] (f) pluginArtifacts = [junit:junit:jar:3.8.1:runtime, org.apache.maven.surefire:surefire:jar:1.5.3:runtime, org.apache.maven.surefire:surefire-booter:jar:1.5.3:runtime, org.codehaus.plexus:plexus-utils:jar:1.0.4:runtime, org.apache.maven:maven-plugin-api:jar:2.0:runtime, org.apache.maven:maven-artifact:jar:2.0:runtime]
[DEBUG] (f) printSummary = false
[DEBUG] (f) reportFormat = xml
[DEBUG] (f) reportsDirectory = c:\example\server\target/surefire-reports
[DEBUG] (f) testClassesDirectory = c:\example\server\target\test-classes
[DEBUG] (f) testFailureIgnore = true
[DEBUG] (f) useFile = true
[DEBUG] – end configuration –
[INFO] [surefire:test]
[INFO] Setting reports dir: c:\example\server\target/surefire-reports
[DEBUG] Test Classpath :
[DEBUG] c:\example\server\target\test-classes
[DEBUG] c:\example\server\target\emma-classes <----- my classes before default classes
[DEBUG] c:\example\server\target\classes <----- is it correct they are still in classpath?
[DEBUG] c:\example\server\target\test-classes

Next, with surefire 2.2, classesDirectory is completely ignored:

[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-surefire-plugin:2.2:test' -->
[DEBUG] (f) basedir = c:\example\server
[DEBUG] (f) childDelegation = false
[DEBUG] (f) classesDirectory = c:\example\server\target\emma-classes
[DEBUG] (f) classpathElements = [c:\example\server\target\classes, c:\example\server\target\test-classes, C:\WINDOWS\Profiles\butenuth\.m2\repository\emma\emma\2.0.5312\emma-2.0.5312.jar, C:\WINDOWS\Profiles\butenuth\.m2\repository\junit\junit\3.8.1\junit-3.8.1.jar, C:\WINDOWS\Profiles\butenuth\.m2\repository\de\sdm\calculator\interface\1.0-SNAPSHOT\interface-1.0-SNAPSHOT.jar]
[DEBUG] (f) disableXmlReport = false
[DEBUG] (f) forkMode = once
[DEBUG] (f) jvm = java
[DEBUG] (f) localRepository = [local] -> file://C:\WINDOWS\Profiles\butenuth\.m2\repository
[DEBUG] (f) parallel = false
[DEBUG] (f) pluginArtifactMap =

{org.codehaus.plexus:plexus-utils=org.codehaus.plexus:plexus-utils:jar:1.1:runtime, org.apache.maven.surefire:surefire-api=org.apache.maven.surefire:surefire-api:jar:2.0:runtime, org.apache.maven:maven-artifact=org.apache.maven:maven-artifact:jar:2.0:runtime, org.apache.maven:maven-plugin-api=org.apache.maven:maven-plugin-api:jar:2.0:runtime, org.apache.maven.surefire:surefire-booter=org.apache.maven.surefire:surefire-booter:jar:2.0:runtime}

[DEBUG] (f) printSummary = false
[DEBUG] (f) projectArtifactMap =

{de.sdm.calculator:interface=de.sdm.calculator:interface:jar:1.0-SNAPSHOT:compile, emma:emma=emma:emma:jar:2.0.5312:test, junit:junit=junit:junit:jar:3.8.1:test}

[DEBUG] (f) remoteRepositories = [[central] -> http://dussalsaseu1.dus.sdm.de:5003/maven-proxy/repository]
[DEBUG] (f) reportFormat = xml
[DEBUG] (f) reportsDirectory = c:\example\server\target\surefire-reports
[DEBUG] (f) testClassesDirectory = c:\example\server\target\test-classes
[DEBUG] (f) testFailureIgnore = true
[DEBUG] (f) testSourceDirectory = c:\example\server\src\test\java
[DEBUG] (f) threadCount = 5
[DEBUG] (f) trimStackTrace = true
[DEBUG] (f) useFile = true
[DEBUG] – end configuration –
[INFO] [surefire:test]
[DEBUG] dummy:dummy:jar:1.0 (selected for null)
...
[DEBUG] Test Classpath :
[DEBUG] c:\example\server\target\classes
[DEBUG] c:\example\server\target\test-classes
[DEBUG] C:\WINDOWS\Profiles\butenuth\.m2\repository\emma\emma\2.0.5312\emma-2.0.5312.jar
[DEBUG] C:\WINDOWS\Profiles\butenuth\.m2\repository\junit\junit\3.8.1\junit-3.8.1.jar
[DEBUG] C:\WINDOWS\Profiles\butenuth\.m2\repository\de\sdm\calculator\interface\1.0-SNAPSHOT\interface-1.0-SNAPSHOT.jar
[DEBUG] Setting system property [localRepository]=[C:\WINDOWS\Profiles\butenuth\.m2\repository]
[DEBUG] Setting system property [basedir]=[c:\example\server]