diff --git a/test/stdstream.sh b/test/stdstream.sh
index 87ad2ca..8e70f74 100755
--- a/test/stdstream.sh
+++ b/test/stdstream.sh
@@ -14,14 +14,15 @@ EOF
 
 chmod +x "$cmdfile"
 
-# test stdout
-result=$(echo 5 | "$TRY" "$cmdfile" 2>/dev/null)
-expected=$(echo 5 | sh "$cmdfile" 2>/dev/null)
-
-[ "$result" = "$expected" ] || exit 1
+try_stdout=$(mktemp)
+try_stderr=$(mktemp)
+sh_stdout=$(mktemp)
+sh_stderr=$(mktemp)
 
-# test stdout + stderr
-result=$(echo 5 | "$TRY" "$cmdfile" 2>&1)
+# test stdout
+echo 5 | "$TRY" "$cmdfile" >$try_stdout 2>$try_stderr
+echo 5 | sh "$cmdfile" >$sh_stdout 2>$sh_stderr
 
-# using grep because stdout also includes try err/warns
-echo "$result" | grep 15 > /dev/null
+diff $try_stdout $sh_stdout || exit 1
+diff $try_stderr $sh_stderr || exit 1
+rm $try_stdout $try_stderr $sh_stdout $sh_stderr