Rosjava building test fails

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I recently upgraded to the gradle version of rosjava. When I build the test with #./gradlew test I got 16 errors. I checked the report and saw that the following errors occured:

MessageSerializationTest.testBool
MessageSerializationTest.testDuration
MessageSerializationTest.testFloat32
MessageSerializationTest.testFloat64
MessageSerializationTest.testInt16
MessageSerializationTest.testInt32
MessageSerializationTest.testInt64
MessageSerializationTest.testInt8
MessageSerializationTest.testNestedMessage
MessageSerializationTest.testNestedMessageArray
MessageSerializationTest.testString
MessageSerializationTest.testTime
MessageSerializationTest.testUInt16
MessageSerializationTest.testUInt32
MessageSerializationTest.testUInt64
MessageSerializationTest.testUint8

When checking all the errors, it says that the std_msgs/msg/ doesn't exist. (e.g) "java.util.NoSuchElementException: Resource does not exist: /std_msgs/msg/Bool.msg"

ROS itself is installed and runns smoothly.

I am using ROS Fuerte on Ubuntu 12.04LTS.