make test failure

[Kenneth Lee]

Today I run make test with mod_perl the first time (I was skipping it before)

modules/request.....Modification of a read-only value attempted at
modules/request.t line 128.
modules/request.....dubious                                                  
        Test returned status 2 (wstat 512, 0x200)
DIED. FAILED tests 3-10
        Failed 8/10 tests, 20.00% okay

What does this mean? I couldn't find it in the guide.
I'm using all the latest packages with RedHat 6.1 on x86. 

apache 1.3.12
perl 5.6.0
mod_perl 1.24
libapreq 0.31

Thanks.
Kenneth