Index: tests/self-test
--- tests/self-test.orig
+++ tests/self-test
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/ksh
 
 MINIMODEM="${MINIMODEM-./minimodem}"
 [ -f "$MINIMODEM" ] || {
@@ -83,6 +83,6 @@ exitcode=0
     fi
 }
 
-echo -e "$result $stats"
+echo "$result $stats"
 
 exit $exitcode