===================================================================
RCS file: /cvs/mandoc/regress/roff/string/Makefile,v
retrieving revision 1.1
retrieving revision 1.3
diff -u -p -r1.1 -r1.3
--- mandoc/regress/roff/string/Makefile	2017/02/08 03:03:28	1.1
+++ mandoc/regress/roff/string/Makefile	2018/04/09 02:31:43	1.3
@@ -1,11 +1,15 @@
-# $OpenBSD: Makefile,v 1.1 2017/02/08 03:03:28 schwarze Exp $
+# $OpenBSD: Makefile,v 1.3 2018/04/09 02:31:43 schwarze Exp $
 
-REGRESS_TARGETS=escape infinite zerolength name
-LINT_TARGETS = name
+REGRESS_TARGETS	 = escape infinite name std undef zerolength
+LINT_TARGETS	 = name std undef
 
 # The infinite test fails badly with groff-1.20.1:
 # It fails to print the following text.
 
-SKIP_GROFF ?= infinite
+SKIP_GROFF	?= infinite
+
+# Groff can expand standard macros as strings, but mandoc cannot.
+
+SKIP_GROFF	+= std
 
 .include <bsd.regress.mk>