Index: head/contrib/netbsd-tests/lib/libm/t_cbrt.c
===================================================================
--- head/contrib/netbsd-tests/lib/libm/t_cbrt.c
+++ head/contrib/netbsd-tests/lib/libm/t_cbrt.c
@@ -268,6 +268,10 @@
 	long double y, z;
 	size_t i;
 
+#if defined(__amd64__) && defined(__clang__) && __clang_major__ >= 7
+	atf_tc_expect_fail("test fails with clang 7+ - bug 234040");
+#endif
+
 	for (i = 0; i < __arraycount(x); i++) {
 
 		y = cbrtl(x[i]);
Index: head/lib/msun/tests/trig_test.c
===================================================================
--- head/lib/msun/tests/trig_test.c
+++ head/lib/msun/tests/trig_test.c
@@ -160,6 +160,10 @@
 
 	unsigned i;
 
+#if defined(__amd64__) && defined(__clang__) && __clang_major__ >= 7
+	atf_tc_expect_fail("test fails with clang 7+ - bug 234040");
+#endif
+
 	for (i = 0; i < nitems(f_pi_odd); i++) {
 		ATF_CHECK(fabs(sinf(f_pi_odd[i])) < FLT_EPSILON);
 		ATF_CHECK(cosf(f_pi_odd[i]) == -1.0);