--- libmalloc/libmalloc-317.40.8/tests/Makefile
+++ libmalloc/libmalloc-425.100.7/tests/Makefile
@@ -30,6 +30,7 @@
 OTHER_CFLAGS += \
 	-DDARWINTEST \
 	-DOS_UNFAIR_LOCK_INLINE=1 \
+	-fno-builtin \
 	-lCrashReporterClient \
 	-I$(SDKROOT)/System/Library/Frameworks/System.framework/PrivateHeaders \
 	-I$(SRCROOT)/../private \
@@ -59,6 +60,8 @@
 BATS_PLISTS = $(BATS_PLISTS_EXTRACT)
 endif
 
+BATS_PLISTS += $(PROJECT_DIR)/tests/xctests/BATS.plist
+
 $(BATS_PLISTS_EXTRACT): %.plist : %
 	$(EXTRACTMETA) extract -i /$(INSTALLPATH)/$(notdir $<) -b $(SYMROOT)/$(notdir $<) -o $@
 	@plutil -convert binary1 $@