1. Create CDI Project 2. Create Bean "Test' 3. set content of bean to import javax.enterprise.inject.Produces; import javax.inject.Inject; import javax.inject.Named; public class Test { @Inject Test2 create; @Produces public Test2 create2() { return new Test2( "a" ); } @Produces @Named public Test2 create() { return new Test2( "b" ); } public static class Test2{ public Test2( String s){ } } } FAIL: No validation warning is shown. You have to save the editor to see the warning