diff --git a/tsconfig.json b/tsconfig.json
index cbdb138..41093d5 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -26,7 +26,8 @@
         "name": "ts-lit-plugin",
         "strict": true
       }
-    ]
+    ],
+    "types": ["mocha"]
   },
   "include": ["src/**/*.ts"],
   "exclude": []