diff --git a/test/check-md5 b/test/check-md5
new file mode 100755
index 0000000..c3f5591
--- /dev/null
+++ b/test/check-md5
@@ -0,0 +1,38 @@
+#!/bin/sh
+
+set -e
+
+checkmd5()
+{
+    CMD="$1"
+    REFMD5="$2"
+    printf " $(echo "$CMD .............................." | cut -b1-30) "
+    MD5="$(eval "$CMD | $ZZUF -m -r0" 2>/dev/null | cut -f2 -d' ')"
+    TESTED=$(($TESTED + 1))
+    if [ "$MD5" != "$REFMD5" ]; then
+        FAILED=$(($FAILED + 1))
+        echo "$MD5 FAILED"
+    else
+        echo 'ok'
+    fi
+}
+
+DIR="$(dirname "$0")"
+ZZUF="$DIR/../src/zzuf"
+FAILED=0
+TESTED=0
+
+echo "*** running zzuf MD5 test ***"
+
+checkmd5 "printf ''" d41d8cd98f00b204e9800998ecf8427e
+checkmd5 echo 68b329da9893e34099c7d8ad5cb9c940
+checkmd5 "printf 'hello world'" 5eb63bbbe01eeed093cb22bb8f5acdc3
+
+if [ "$FAILED" != 0 ]; then
+    echo "*** $FAILED tests failed out of $TESTED ***"
+    exit 1
+fi
+echo "*** all $TESTED tests OK ***"
+
+exit 0
+