diff -Naur tests.old/openpgp/mds.test tests/openpgp/mds.test
--- tests.old/openpgp/mds.test	2016-05-03 13:13:11.373313389 +0200
+++ tests/openpgp/mds.test	2016-05-03 13:13:31.886755059 +0200
@@ -63,7 +63,7 @@
 
 [ "$failed" != "" ] && error "$failed failed for empty string"
 
-echo_n "abcdefghijklmnopqrstuvwxyz" | $GPG --with-colons --print-mds >y
+printf "abcdefghijklmnopqrstuvwxyz" | $GPG --with-colons --print-mds >y
 if have_hash_algo "MD5"; then
   test_one ":1:"    "C3FCD3D76192E4007DFB496CCA67E13B"
 fi