Index: tests/pybin/settings.py
===================================================================
--- tests/pybin/settings.py	(revision 5a96b36dfd9c18a6b05535fee2a64ba4b8062330)
+++ tests/pybin/settings.py	(revision e173d3c3ffdc4e6c03286e459434076a3a6b7823)
@@ -102,13 +102,13 @@
 			self.target = ast
 			self.string = "New AST"
-			self.flags  = """AST_FLAGS=-XCFA,--new-ast"""
+			self.flags  = """"""
 		elif ast == "old":
 			self.target = ast
 			self.string = "Old AST"
-			self.flags  = """AST_FLAGS=-XCFA,--old-ast"""
+			self.flags  = """"""
 		elif ast == None:
 			self.target = "new" if config.NEWAST else "old"
 			self.string = "Default AST (%s)" % self.target
-			self.flags  = """AST_FLAGS="""
+			self.flags  = """"""
 		else:
 			print("""ERROR: Invalid ast configuration, must be "old", "new" or left unspecified, was %s""" % (value), file=sys.stderr)