diff --git a/testimages/nightshot_iso_100.txt b/testimages/nightshot_iso_100.txt
new file mode 100644
index 00000000..0ce72e0a
--- /dev/null
+++ b/testimages/nightshot_iso_100.txt
@@ -0,0 +1,2 @@
+This image was extracted from the 8-bit nightshot_iso_100 image available at
+http://www.imagecompression.info/test_images/