diff --git a/Rakefile b/Rakefile
index 51b7d79..609f522 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,8 +1,37 @@
+require 'tempfile'
 require 'cucumber/rake/task'
 require 'rspec/core/rake_task'
 
+XEPHYR_DISPLAY  = ':42'
+XEPHYR_CMD      = "$(command -v Xephyr) #{XEPHYR_DISPLAY} -ac -br -noreset".freeze
+XEPHYR_SCREENS  = '-screen 1436x400'.freeze
+XEPHYR_SCREENS_XINERAMA =
+  '+xinerama -origin 0,0 -screen 1920x400 -origin 1920,0 -screen 1920x400'.freeze
+
 task default: %i[features spec]
 
 Cucumber::Rake::Task.new(:features)
 
 RSpec::Core::RakeTask.new
+
+desc 'Run uhwm in a Xephyr X server'
+task :run do
+  Tempfile.create('uhwm_xinitrc') do |xinitrc|
+    xinitrc.write <<-eoh
+[ -f $HOME/.Xdefaults ] && xrdb $HOME/.Xdefaults
+#xkbcomp #{ENV['DISPLAY']} #{XEPHYR_DISPLAY}
+xmodmap -display #{ENV['DISPLAY']} -pke | xmodmap -
+xsetroot -solid SpringGreen
+echo "######## UHWM START ########"
+./bin/uhwm -d
+echo "######## UHWM END ##########"
+    eoh
+    xinitrc.flush
+    sh "xinit #{xinitrc.path} --  %s" % [
+      XEPHYR_CMD,
+      ENV.key?('UHWM_XINERAMA') ?
+        XEPHYR_SCREENS_XINERAMA :
+        XEPHYR_SCREENS
+    ].join(' ')
+  end
+end