diff --git a/tests/scripts/hello b/tests/scripts/hello
index bdddc6f..33c93d8 100755
--- a/tests/scripts/hello
+++ b/tests/scripts/hello
@@ -1,15 +1,10 @@
-#!/bin/bash
+#!/bin/sh
 
-read -r
+read -r _
 
-i=0
-
-while [[ i -lt 5 ]]
+for i in $(seq 0 4)
 do
-  echo hello $i "$(date -Is)"
-  # bash is tricky! this actually writes to 1 instead of 2
-  # don't know how to write to 2 in bash
-  # echo world $i "$(date -Is)" >&2
-  i=$((i+1))
+  echo "hello ${i} $(date -Iseconds)"
+  echo "world ${i} $(date -Iseconds)" >&2
   sleep 0.5
 done