Made test execution faster and also a bit more reliable. The remaining problem is the screen stuff command :/

test.py

@@ -75,15 +75,19 @@ EOF
 
             handle, fn = tempfile.mkstemp(prefix="PySnipEmuTest",suffix=".txt")
             os.close(handle)
+            os.unlink(fn)
 
             self.escape()
             self.send(":w! %s\n" % fn)
 
-            # Give screen a chance to send the cmd and vim to write the file
-            time.sleep(.25)
-
             # Read the output, chop the trailing newline
+            tries = 50
+            while tries:
+                if os.path.exists(fn):
                     self.output = open(fn,"r").read()[:-1]
+                    break
+                time.sleep(.05)
+                tries -= 1
 
 
     def cmd(self):