Does it make sense to have an exact copy of a class, like this: diff drools-core/src/test/java/org/drools/reteoo/test/parser/DroolsParserException.java drools-compiler/src/main/java/org/drools/compiler/DroolsParserException.java 17c17 < package org.drools.reteoo.test.parser; --- All right, they are in different packages and even different (sub-)projects, but still...