Env: Maven 2.x, Spring 3.1.0.RC1

When trying to use Spring bean profiles in my Maven tests via the spring.profiles.active system property, I want to pass a comma-separated list of the active Maven profiles since I have a one-to-one mapping from my active Maven profiles to my Spring bean profiles.

What's the magic Maven property expression I need? I've been trying variants of the following (see <argLine> below):
Code:
...
            <plugin>                
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <argLine>-Dspring.profiles.active=${project.build.profiles.active}</argLine>
...
Thanks,
Matthew