diff --git a/drkonqi/tests/integration/suite b/drkonqi/tests/integration/suite
index 859415446..4ae21a59e 100755
--- a/drkonqi/tests/integration/suite
+++ b/drkonqi/tests/integration/suite
@@ -1,82 +1,82 @@
 #!/usr/bin/env ruby
 #
 # Copyright (C) 2017 Harald Sitter <sitter@kde.org>
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License as
 # published by the Free Software Foundation; either version 2 of
 # the License or (at your option) version 3 or any later version
 # accepted by the membership of KDE e.V. (or its successor approved
 # by the membership of KDE e.V.), which shall act as a proxy
 # defined in Section 14 of version 3 of the license.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 require 'fileutils'
 require 'optparse'
 require 'tmpdir'
 
 # Isolates GUI via xephyr
 class XephyrIsolator
   def run(cmd)
     ephemeral('Xephyr -screen 1024x768x24+32 :666') do
       ENV['DISPLAY'] = ':666'
       system(cmd) || raise
     end
   end
 
   private
 
   def ephemeral(*args)
     pid = spawn(*args)
     yield
   ensure
     Process.kill('KILL', pid) if pid
     Process.waitpid2(pid) if pid
   end
 end
 
 # Isolates GUI via xvfb-run
 class XvfbIsolator
   def run(cmd)
     warn "xvfb-run -a --server-args=\"-screen 0 1024x768x24\" #{cmd}"
     system("xvfb-run -a --server-args=\"-screen 0 1024x768x24\" #{cmd}") || raise
   end
 end
 
 OptionParser.new do |opts|
   opts.banner = "Usage: #{$0} ARGS"
 
   opts.separator('')
 
   opts.on('--drkonqi PATH', 'Path to drkonqi bin to test.') do |v|
     ENV['DRKONQI_PATH'] = v
   end
 
   opts.on('--at-spi-bus-launcher PATH',
           'Path to --at-spi-bus-launcher bin to use for testing.') do |v|
     ENV['AT_SPI_BUS_LAUNCHER_PATH'] = v
   end
 end.parse!
 
 ENV['DRKONQI_PATH'] ||= '/usr/lib/x86_64-linux-gnu/libexec/drkonqi'
 ENV['AT_SPI_BUS_LAUNCHER_PATH'] ||= '/usr/lib/at-spi2-core/at-spi-bus-launcher'
 
 # Isolate ourselves by forcing into a separate home and unsetting the XDG path
 # variables. Then spin up a suitable virtual X, run a new dbus session bus
 # and our test in that environment.
 Dir.mktmpdir do |tmpdir|
   ENV['HOME'] = tmpdir
   ENV.keys.each { |k| ENV.delete(k) if k.start_with?('XDG_') }
   Dir.glob("#{__dir__}/*_test.rb").each do |test|
     isolator = ENV['XEPHYR'] ? XephyrIsolator.new : XvfbIsolator.new
-    isolator.run("dbus-run-session -- ruby #{test} -p")
+    isolator.run("dbus-run-session -- ruby '#{test}' -p")
   end
   sleep 8 # Wait a bit to make sure all children are dead.
 end