PropertySourcesPropertyResolver resolution order

Following the Maven conventions, I have two database.properties files: one in src/main/resources/META-INF/spring/ (for the "main" classpath) and another in src/test/resources/META-INF/spring/ (for the test classpath).

When I run a JUnit test, Spring is finding both files, and resolving property values from the "main" file and not from the file in the test classpath:

Code:

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PropertySourcesPlaceholderConfigurer - Loading properties file from file [/Users/dserodio/Projetos/vulcano/rest-api/target/test-classes/META-INF/spring/database.properties]
PropertySourcesPlaceholderConfigurer - Loading properties file from file [/Users/dserodio/Projetos/vulcano/rest-api/target/test-classes/META-INF/spring/email.properties]
PropertySourcesPlaceholderConfigurer - Loading properties file from file [/Users/dserodio/Projetos/vulcano/rest-api/target/classes/META-INF/spring/database.properties]
PropertySourcesPlaceholderConfigurer - Loading properties file from file [/Users/dserodio/Projetos/vulcano/rest-api/target/classes/META-INF/spring/email.properties]
MutablePropertySources - Adding [localProperties] PropertySource with lowest search precedence
PropertySourcesPropertyResolver - Searching for key 'database.driverClassName' in [environmentProperties]
PropertySourcesPropertyResolver - Searching for key 'database.driverClassName' in [systemProperties]
PropertySourcesPropertyResolver - Searching for key 'database.driverClassName' in [systemEnvironment]
PropertySourcesPropertyResolver - Could not find key 'database.driverClassName' in any property source. Returning [null]
PropertySourcesPropertyResolver - Searching for key 'database.driverClassName' in [localProperties]
PropertySourcesPropertyResolver - Found key 'database.driverClassName' in [localProperties] with type [String] and value 'org.postgresql.Driver'

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org.postgresql.Driver is my production database, Spring should be resolving the database.driverClassName property as org.h2.Driver instead.

From the log snippet above, you can see that the 'test-classes' is before 'classes' in the classpath. Shouldn't Spring use the value from the first file (ie, the test properties)? I'm using Spring 3.1.1.