--- bind-9.18.48/tests/dns/update_test.c.orig
+++ bind-9.18.48/tests/dns/update_test.c
@@ -47,7 +47,7 @@
 setup_test(void **state) {
 	UNUSED(state);
 
-	setenv("TZ", "", 1);
+	setenv("TZ", "GMT0", 1);
 
 	return 0;
 }