diff --git a/.eslintrc.yml b/.eslintrc.yml
index 6fd7279..3c2d42f 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -2,6 +2,7 @@ env:
   node: true
   # We use Promise, Map, and occasional ES6 syntax.
   es6: true
+  mocha: true
 
 rules:
   # We use semicolons.