diff --git a/README.md b/README.md
index d2fd492..ebca1b2 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,6 @@ Supported formats
 * [ ] [Hunspell dictionaries](https://github.com/hunspell/hunspell/blob/master/man/hunspell.5)
 * [x] [M4/Autotools](http://wolfram.schneider.org/bsd/7thEdManVol2/m4/m4.pdf)
 * [x] [`man.conf`](https://man.openbsd.org/man.conf.5)
-* [x] [`mocha.opts`](https://mochajs.org/#mochaopts)
 * [x] [NEON](https://ne-on.org/)
 * [x] [NWScript](https://en.wikipedia.org/wiki/NWScript)
 * [x] [Object Data Instance Notation](https://git.io/JvetL)