diff --git a/dryscrape/xvfb.py b/dryscrape/xvfb.py
index 6b27ca1..00f7b87 100644
--- a/dryscrape/xvfb.py
+++ b/dryscrape/xvfb.py
@@ -3,15 +3,15 @@
 
 _xvfb = None
 
+
 def start_xvfb():
   from xvfbwrapper import Xvfb
   global _xvfb
-  if "DISPLAY" in os.environ:
-    del os.environ["DISPLAY"]
   _xvfb = Xvfb()
   _xvfb.start()
   atexit.register(_xvfb.stop)
 
+
 def stop_xvfb():
   global _xvfb
   _xvfb.stop()