perl-Test-Assert-0.0504-9.fc21 can fail to build from sources due tests sensitive to network:

+ ./Build test --test_files 'xt/check_changes.t xt/consistent_version_numbers.t xt/distribution.t xt/kwalitee.t xt/minimumversion.t  xt/pod.t xt/pod_coverage.t xt/pod_syntax.t xt/signature.t'
xt/check_changes.t ............... ok
xt/consistent_version_numbers.t .. ok
xt/distribution.t ................ ok
xt/kwalitee.t .................... ok
xt/minimumversion.t .............. ok
xt/pod.t ......................... ok
xt/pod_coverage.t ................ ok
xt/pod_syntax.t .................. ok
gpg: new configuration file `/builddir/.gnupg/gpg.conf' created
gpg: WARNING: options in `/builddir/.gnupg/gpg.conf' are not yet active during this run
gpgkeys: HTTP fetch error 7: Failed to connect to pool.sks-keyservers.net port 11371: Network is unreachable
gpg: Signature made Sun Dec  6 23:48:27 2009 CET using DSA key ID C0B10A5B
gpg: requesting key C0B10A5B from hkp server pool.sks-keyservers.net
gpg: no valid OpenPGP data found.
gpg: Can't check signature: public key not found
==> BAD/TAMPERED signature detected! <==
#   Failed test 'Valid signature'
#   at xt/signature.t line 9.
# Looks like you failed 1 test of 1.
xt/signature.t ................... 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/1 subtests 
Test Summary Report
-------------------
xt/signature.t                 (Wstat: 256 Tests: 1 Failed: 1)
  Failed test:  1
  Non-zero exit status: 1
Files=9, Tests=40, 11 wallclock secs ( 0.04 usr  0.02 sys +  5.47 cusr  0.13 csys =  5.66 CPU)
Result: FAIL