The test files in this directory mostly have dimension 157x151.
The naming convention is

   photometric-channels-bits.tiff

minisblack-1c-16b.tiff
minisblack-1c-8b.tiff
miniswhite-1c-1b.tiff
palette-1c-1b.tiff
palette-1c-4b.tiff
palette-1c-8b.tiff
rgb-3c-16b.tiff
rgb-3c-8b.tiff

logluv-3c-16b.tiff: logluv compression/photometric interp
minisblack-2c-8b-alpha.tiff: grey+alpha

BMP files (anchient BMPv2 since v3 does not work):

  palette-1c-8b.bmp
  rgb-3c-8b.bmp

GIF files (anchient GIF '87 since modern GIF does not work):
  palette-1c-8b.gif

PNM files:
  minisblack-1c-8b.pgm
  miniswhite-1c-1b.pbm
  rgb-3c-8b.ppm

G3 Fax files :
  miniswhite-1c-1b.g3

deflate-last-strip-extra-data.tiff is
https://github.com/OSGeo/gdal/blob/master/autotest/alg/data/utmsmall_near.tiff