diff --git a/gfx/thebes/Makefile.in b/gfx/thebes/Makefile.in
index 0a57d8dc362f..0e1233612429 100644
--- a/gfx/thebes/Makefile.in
+++ b/gfx/thebes/Makefile.in
@@ -11,7 +11,9 @@ MODULE	= thebes
 DIRS	= public src
 
 ifdef ENABLE_TESTS
+ifndef MOZ_ENABLE_LIBXUL
 TOOL_DIRS  += test
 endif
+endif
 
 include $(topsrcdir)/config/rules.mk