Test passes if each pair of upper and lower "Filler Text" in the square box is identical.

black
F●i●l●l●e●r● Text
F●i●l●l●e●r● Text
blue
F●i●l●l●e●r● Text
F●i●l●l●e●r● Text
green
F●i●l●l●e●r● Text
F●i●l●l●e●r● Text
red
F●i●l●l●e●r● Text
F●i●l●l●e●r● Text
current-color
F●i●l●l●e●r● Text
F●i●l●l●e●r● Text

If you are unable to see font glyphs for certain characters using the browsers default font, install the IPA Font(http://ossipedia.ipa.go.jp/ipafont/) and apply it.