diff --git a/test/zdtm/Makefile b/test/zdtm/Makefile
index 66fa15bc2..5e0ba42b8 100644
--- a/test/zdtm/Makefile
+++ b/test/zdtm/Makefile
@@ -1,6 +1,7 @@
 SUBDIRS	=	lib live
 
 default:	all
+.PHONY: default
 
 %:
 	set -e; for d in $(SUBDIRS); do $(MAKE) -C $$d $@; done
diff --git a/test/zdtm/live/Makefile b/test/zdtm/live/Makefile
index 0a551044c..0640bb4d9 100644
--- a/test/zdtm/live/Makefile
+++ b/test/zdtm/live/Makefile
@@ -1,6 +1,7 @@
 SUBDIRS	=	streaming transition static
 
 default:	all
+.PHONY: default
 
 %:
 	set -e; for d in $(SUBDIRS); do $(MAKE) -C $$d $@; done