zenity failing in crontab but working in shell

I'm trying to run a script that calls zenity from a crontab and it fails. The script works well from the command line. I do pass the DISPLAY in the crontab:

* * * * * DISPLAY=:1 bin/myscript.sh > /tmp/debug.txt 2>&1

In the debug logs, I get:

This option is not available. Please see --help for all possible usages.

Trying to remove the options, I found that the problematic is "--text" because the following doesn't work:

zenity --warning --title "Fais gaffe" --text "Bientôt plus de batterie"

But the following does:

zenity --warning --title "Fais gaffe"