How do you include multiple activities in the Gradle Liquibase plugin's runList field?

I’m using Gradle 2.7 on Mac Yosemite with Java 8. I’m using the Liquibase 1.1.1 plugin and would like to use it to do a couple of activities (build a test database and build my normal database). So I have

liquibase {
  activities {
    main {
      File propsFile = new File("${project.rootDir}/src/main/resources/liquibase.properties")
      Properties properties = new Properties()
      properties.load(new FileInputStream(propsFile))
      changeLogFile 'src/main/resources/db.changelog-master.xml'
      url properties['url']
      username properties['username']
      password properties['password']
    }
    test {
        url 'jdbc:h2:file:target/testdb'
        username 'sa'
    }
    runList = (
        "test"
        "main"
    )
  }
}

But I can’t figure out the proper syntax for runList. I get the error when running the above …

* Where:
Build file '/Users/myuser/Dropbox/cb_workspace/cbmyproject/build.gradle' line: 163

* What went wrong:
Could not compile build file '/Users/myuser/Dropbox/cb_workspace/cbmyproject/build.gradle'.
> startup failed:
  build file '/Users/myuser/Dropbox/cb_workspace/cbmyproject/build.gradle': 163: expecting ')', found 'main' @ line 163, column 2.
        "main"  
      ^

  1 error


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED