vroom and tmux setup to to quickly zoom rspec's pane and put it into copy mode.

.tmux.conf

# quick zoom of another pane, with a given title ("target" in this example)
bind-key k run "~/bin/tmux-zoom-pane target"

.vimrc

" Vroom setup
let g:vroom_clear_screen=0
let g:vroom_use_vimux=1
let g:vroom_use_bundle_exec=0
let g:vroom_use_binstubs=0
let g:vroom_use_bundle_exec=0
let g:vroom_rspec_version='1.x'
let g:vroom_use_colors=0
" this gives rspec's pane a title "target", that we'll late use to find its id
let g:vroom_spec_command="printf '\\033]2;target\\033\\\\' && rspec "

tmux-zoom-pane

#!/bin/bash

target_title=$1
target_id=`tmux list-panes -F '#{pane_id},#{pane_title}' | grep $target_title | cut -f1 -d,`

tmux resize-pane -Z -t "$target_id" \; copy-mode