diff --git a/tests/args.sh b/tests/args.sh
index 67c66ff..bc112d7 100755
--- a/tests/args.sh
+++ b/tests/args.sh
@@ -3,8 +3,8 @@
 set -e
 die() { echo "$@" 1>&2 ; exit 1; }
 
-( dub args.d | grep -q '^argtest=$' ) || die "Fail (no argument)"
-( dub args.d --argtest=aoeu | grep -q '^argtest=aoeu$' ) || die "Fail (with argument)"
-( ( ! dub args.d --inexisting 2>&1 ) | grep -qF 'Unrecognized command line option' ) || die "Fail (unknown argument)"
+( dub args.d | grep -q '^argtest=$' ) || die "Fail (no argument): '`dub args.d`'"
+( dub args.d --argtest=aoeu | grep -q '^argtest=aoeu$' ) || die "Fail (with argument): '`dub args.d --argtest=aoeu`'"
+( ( ! dub args.d --inexisting 2>&1 ) | grep -qF 'Unrecognized command line option' ) || die "Fail (unknown argument): '`dub args.d --inexisting 2>&1`'"
 
 echo 'OK'