diff --git a/testsuite/hostname/hostname-d-works b/testsuite/hostname/hostname-d-works
index a9aeb92..e062242 100644
--- a/testsuite/hostname/hostname-d-works
+++ b/testsuite/hostname/hostname-d-works
@@ -1,2 +1,3 @@
-test x$(hostname -d) = x$(busybox hostname -d)
-
+f=$(busybox hostname -f)
+d=$(busybox hostname -d)
+test x"${f#*.}" = x"$d"