zless exits when reaching EOF I run the command

zless some.log


in OS X 10.11.5 El Capitan.

It closes when reaching EOF.

I checked aliases and I do not have LESS env variable set up but still it looks like zless runs with -Q or -q parameter on.

less command runs just as expected not closing after reaching EOF.

Any help would be appreciated.
zless/zmore will use /usr/bin/more as the default PAGER unless PAGER is set. Add the following lines to your shell login/env file (bash, ksh, and zsh).

PAGER=/usr/bin/less
export PAGER


For tcsh:

setenv PAGER /usr/bin/less