assert_no_diff $tmp $out.2
rm $tmp
-# This one will not work for some reason?
-# run "write_fasta -I $in -w 4 -Z -o $tmp -x"
-# assert_no_diff $tmp $out.3
-# rm $tmp
+run "write_fasta -I $in -w 4 -Z -o $tmp.gz -x"
+gunzip $tmp.gz
+assert_no_diff $tmp $out.3
+rm $tmp