diff --git a/modules/plugin/test/mochitest/Makefile.in b/modules/plugin/test/mochitest/Makefile.in
index 0c044a56157..bc20e7519bc 100644
--- a/modules/plugin/test/mochitest/Makefile.in
+++ b/modules/plugin/test/mochitest/Makefile.in
@@ -47,5 +47,5 @@ include $(topsrcdir)/config/rules.mk
 # Test disabled for now due to leaks.
 #_TEST_FILES =	test_npruntime.xul
 
-libs:: $(_TEST_FILES)
-	$(INSTALL) $^ $(DEPTH)/_tests/testing/mochitest/chrome/$(relativesrcdir)
+#libs:: $(_TEST_FILES)
+#	$(INSTALL) $^ $(DEPTH)/_tests/testing/mochitest/chrome/$(relativesrcdir)