Test suite fails on redhat-based linux distributions

[eserte]

On my CentOS 6, CentOS 7 and Fedora 28 smokers I see the test suite failing like this:

t/line.t at t/lib/VimTest.pm line 7.
-e at t/lib/VimTest.pm line 7.t/line.t ............... 
No subtests run 
t/range.t at t/lib/VimTest.pm line 7.
-e at t/lib/VimTest.pm line 7.t/range.t .............. 
No subtests run 
t/synopsis.t at t/lib/VimTest.pm line 7.
-e at t/lib/VimTest.pm line 7.t/synopsis.t ........... 
No subtests run 
t/vim-x.t at t/lib/VimTest.pm line 7.

[yanick]

Can you try one of the failing smokers with the code in the branch at https://github.com/yanick/Vim-X/tree/no-x? I've changed the call to vim in the tests to disable all X11 stuff, which might be the problem.

[eserte]

I tried e2e82bf on a fedora 28 system with perl 5.28.0 and it does not improve:

$ /opt/perl-5.28.0/bin/dzil test
...
t/00-report-prereqs.t .. ok   
t/line.t ............... t/line.t at t/lib/VimTest.pm line 7.
t/line.t ............... No subtests run 
t/range.t .............. t/range.t at t/lib/VimTest.pm line 7.
t/range.t .............. No subtests run 
t/synopsis.t ........... t/synopsis.t at t/lib/VimTest.pm line 7.
t/synopsis.t ........... No subtests run 
t/vim-x.t .............. t/vim-x.t at t/lib/VimTest.pm line 7.
t/vim-x.t .............. No subtests run 

Test Summary Report
-------------------
t/line.t             (Wstat: 0 Tests: 0 Failed: 0)
  Parse errors: No plan found in TAP output
t/range.t            (Wstat: 0 Tests: 0 Failed: 0)
  Parse errors: No plan found in TAP output
t/synopsis.t         (Wstat: 0 Tests: 0 Failed: 0)
  Parse errors: No plan found in TAP output
t/vim-x.t            (Wstat: 0 Tests: 0 Failed: 0)
  Parse errors: No plan found in TAP output
Files=6, Tests=9,  1 wallclock secs ( 0.01 usr  0.02 sys +  0.92 cusr  0.15 csys =  1.10 CPU)
Result: FAIL
Failed 4/6 test programs. 0/9 subtests failed.
make: *** [Makefile:883: test_dynamic] Error 255
error running make test