diff --git a/collects/2htdp/tests/batch-io-csv-ho.rktl b/collects/2htdp/tests/batch-io-csv-ho.txt
similarity index 100%
rename from collects/2htdp/tests/batch-io-csv-ho.rktl
rename to collects/2htdp/tests/batch-io-csv-ho.txt