chromium/third_party/blink/web_tests/resources/fixed-pitch-font/README

Roboto
Christian Robertson
Apache License, version 2.0
http://www.google.com/fonts/specimen/Roboto

test.ttf is a subset of Roboto Light that has only glyphs for the string "tes ".
test-fixed is the same font, with isFixedPitch set to 1.