diff --git a/tools/test-avrdude b/tools/test-avrdude
index 0be49efcf..ce0302b45 100755
--- a/tools/test-avrdude
+++ b/tools/test-avrdude
@@ -167,6 +167,17 @@ if [[ $verbose -eq 1 ]]; then
 fi
 
 [[ -d $tmp && -w $tmp ]] || tmp=/tmp # Fall back to /tmp if tmp directory unusable
+
+if [[ $verbose -eq 1 ]]; then
+    echo "tmp=$tmp"
+    id
+    ls -ld "$tmp"
+    tmpfile="$tmp/date.txt$$"
+    date > "$tmpfile"
+    cat "$tmpfile"
+    rm -f "$tmpfile"
+fi
+
 status=$(mktemp "$tmp/$progname.status.XXXXXX")
 logfile=$(mktemp "$tmp/$progname.log.XXXXXX")
 outfile=$(mktemp "$tmp/$progname.out.XXXXXX")