Run of unchanged for cherrytree

Try this locally package):

debcheckout cherrytree
cd cherrytree
just-build
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Processing triggers for dictionaries-common (1.28.3) ...

(Reading database ... 26990 files and directories currently installed.)
Removing autopkgtest-satdep (0) ...
autopkgtest [00:05:05]: test command1: cherrytree -h
autopkgtest [00:05:05]: test command1: [-----------------------
Unable to init server: Could not connect: Connection refused

(cherrytree:31636): Gtk-WARNING **: 00:05:05.575: cannot open display: 
autopkgtest [00:05:05]: test command1: -----------------------]
autopkgtest [00:05:05]: test command1:  - - - - - - - - - - results - - - - - - - - - -
command1             FAIL non-zero exit status 1
autopkgtest [00:05:06]: test command1:  - - - - - - - - - - stderr - - - - - - - - - -
Unable to init server: Could not connect: Connection refused

(cherrytree:31636): Gtk-WARNING **: 00:05:05.575: cannot open display: 

Full worker log Full build log