Index: lib/libc/tests/iconv/Makefile
===================================================================
--- lib/libc/tests/iconv/Makefile
+++ lib/libc/tests/iconv/Makefile
@@ -3,5 +3,6 @@
 TESTSDIR=	${TESTSBASE}/lib/libc/iconv
 
 ATF_TESTS_C+=	iconvctl_test
+WARNS?=		2
 
 .include <bsd.test.mk>
Index: lib/libc/tests/nss/Makefile
===================================================================
--- lib/libc/tests/nss/Makefile
+++ lib/libc/tests/nss/Makefile
@@ -11,6 +11,7 @@
 ${PACKAGE}FILES+=	mach
 
 CFLAGS+=	-I${SRCTOP}/tests
+WARNS?=		1
 
 ATF_TESTS_C+=	getaddrinfo_test
 ATF_TESTS_C+=	getgr_test
Index: lib/libcrypt/tests/Makefile
===================================================================
--- lib/libcrypt/tests/Makefile
+++ lib/libcrypt/tests/Makefile
@@ -6,6 +6,7 @@
 
 CFLAGS+= -I${.CURDIR:H}
 LIBADD=	crypt
+WARNS?=		6
 
 .include <netbsd-tests.test.mk>
 
Index: lib/libmp/tests/Makefile
===================================================================
--- lib/libmp/tests/Makefile
+++ lib/libmp/tests/Makefile
@@ -3,5 +3,6 @@
 TAP_TESTS_C+=	legacy_test
 
 LIBADD+=	mp
+WARNS?=		3
 
 .include <bsd.test.mk>
Index: lib/libpathconv/tests/Makefile
===================================================================
--- lib/libpathconv/tests/Makefile
+++ lib/libpathconv/tests/Makefile
@@ -6,5 +6,6 @@
 #LIBADD+=	pathconv
 #LDADD+= -L .. -lpathconv
 LDADD+= ../libpathconv.a
+WARNS?=		6
 
 .include <bsd.test.mk>
Index: lib/libproc/tests/Makefile
===================================================================
--- lib/libproc/tests/Makefile
+++ lib/libproc/tests/Makefile
@@ -7,6 +7,7 @@
 BINDIR_target_prog=	${TESTSDIR}
 
 LIBADD=	elf proc rtld_db util
+WARNS?=		6
 
 # Ensure that symbols aren't stripped from the test program, as they're needed
 # for testing symbol lookup.
Index: lib/libutil/tests/Makefile
===================================================================
--- lib/libutil/tests/Makefile
+++ lib/libutil/tests/Makefile
@@ -10,5 +10,6 @@
 TAP_TESTS_C+=	trimdomain-nodomain_test
 
 LIBADD+=	util
+WARNS?=		2
 
 .include <bsd.test.mk>
Index: lib/msun/tests/Makefile
===================================================================
--- lib/msun/tests/Makefile
+++ lib/msun/tests/Makefile
@@ -96,6 +96,7 @@
 # XXX: for some odd reason float.h doesn't tell the full story about what the
 # precision is.
 CFLAGS+=	-DLDBL_PREC=${LDBL_PREC}
+WARNS?=		2
 
 .include <netbsd-tests.test.mk>
 
Index: libexec/rtld-elf/tests/Makefile
===================================================================
--- libexec/rtld-elf/tests/Makefile
+++ libexec/rtld-elf/tests/Makefile
@@ -4,5 +4,6 @@
 
 SUBDIR_DEPEND_target=	libpythagoras
 ATF_TESTS_C=	ld_library_pathfds
+WARNS?=		3
 
 .include <bsd.test.mk>
Index: libexec/rtld-elf/tests/libpythagoras/Makefile
===================================================================
--- libexec/rtld-elf/tests/libpythagoras/Makefile
+++ libexec/rtld-elf/tests/libpythagoras/Makefile
@@ -11,5 +11,6 @@
 SRCS=		pythagoras.c
 
 LIBADD=		m
+WARNS?=		6
 
 .include <bsd.lib.mk>
Index: libexec/rtld-elf/tests/target/Makefile
===================================================================
--- libexec/rtld-elf/tests/target/Makefile
+++ libexec/rtld-elf/tests/target/Makefile
@@ -10,6 +10,7 @@
 LDFLAGS+=	-L${.OBJDIR}/../libpythagoras
 DPADD+=		${.OBJDIR}/../libpythagoras/libpythagoras.a
 LDADD=		-lpythagoras
+WARNS?=		3
 
 MAN=
 
Index: usr.sbin/pw/tests/Makefile
===================================================================
--- usr.sbin/pw/tests/Makefile
+++ usr.sbin/pw/tests/Makefile
@@ -6,6 +6,7 @@
 
 PROGS+=		crypt
 LIBADD+=	crypt
+WARNS?=		6
 
 ATF_TESTS_SH=	pw_etcdir \
 		pw_lock \