Index: tests/pybin/settings.py
===================================================================
--- tests/pybin/settings.py	(revision 34e1494bbcc17cbde2f469d23ea2db3b4585e6cb)
+++ tests/pybin/settings.py	(revision 158b026fb8f759ed1b6cebe96e8a07ccb25235cb)
@@ -97,5 +97,5 @@
 
 		self.string = "installed" if value else "in-tree"
-		self.flags  = """INSTALL_FLAGS=%s""" % ("" if value else "-in-tree")
+		self.flags  = """installed=%s""" % ("yes" if value else "no")
 
 class Timeouts: