diff --git a/test/mfm.ts b/test/mfm.ts
index e838492eb3..789fb898c8 100644
--- a/test/mfm.ts
+++ b/test/mfm.ts
@@ -1,7 +1,11 @@
 /*
  * Tests of MFM
+ *
  * How to run the tests:
  * > mocha test/mfm.ts --require ts-node/register
+ *
+ * To specify test:
+ * > mocha test/mfm.ts --require ts-node/register -g 'test name'
  */
 
 import * as assert from 'assert';