diff --git a/toolkit/mozapps/extensions/test/Makefile.in b/toolkit/mozapps/extensions/test/Makefile.in
index d3bff0c7c5d..533b3e44307 100644
--- a/toolkit/mozapps/extensions/test/Makefile.in
+++ b/toolkit/mozapps/extensions/test/Makefile.in
@@ -49,7 +49,6 @@ include $(DEPTH)/config/autoconf.mk
 MODULE = test_extensionmanager
 
 DIRS = \
-  browser \
   xpinstall \
   $(NULL)