diff --git a/example/Makefile b/example/Makefile
index fb4633f..8d848f4 100644
--- a/example/Makefile
+++ b/example/Makefile
@@ -11,18 +11,22 @@ INTERNALPROG =	# defined
 realinstall:
 proginstall:
 
+E1 = ${.OBJDIR}/${PROG} < ${.CURDIR}/sample.config
 T1 = [ $$(expr "$$(${.OBJDIR}/${PROG} < ${.CURDIR}/sample.config 2>&1)" : "Logging/timeFormat: utc.memory leaks:.0") -eq 39 ]
+E2 = echo '{broken:' | ${.OBJDIR}/${PROG}
 T2 = [ $$(expr "$$(echo '{broken:' | ${.OBJDIR}/${PROG} 2>&1)" : "tree_parse_error: lexical error: invalid char in json text.*memory leaks:.0") -eq 165 ]
 
 regress:
 .if defined(USE_ASAN)
 	if [  -x /usr/sbin/paxctl ]; then /usr/sbin/paxctl +a ${.OBJDIR}/${PROG}; fi
-	ulimit -v unlimited && ${.OBJDIR}/${PROG} < ${.CURDIR}/sample.config
+	ulimit -v unlimited && ${E1}
 	ulimit -v unlimited && ${T1}
+	ulimit -v unlimited && ${E2}
 	ulimit -v unlimited && ${T2}
 .else
-	${.OBJDIR}/${PROG} < ${.CURDIR}/sample.config
+	${E1}
 	${T1}
+	${E2}
 	${T2}
 .endif