Clean up configuration before running tests using Travis CI

utils/build.sh

@@ -18,11 +18,16 @@ fi
 # Build.
 make
 
-# Run tests.
+# Start X11 and window manager.
 export DISPLAY=:99.0
 sh -e /etc/init.d/xvfb start
 sleep 3
 openbox &
+
+# Clean up old configuration.
+rm -rf ~/.config/copyq.test
+
+# Run tests.
 ./copyq tests
 
 cd "$root"