diff --git a/tsconfig.ava.json b/tsconfig.ava.json
index e8c7058..1983c15 100644
--- a/tsconfig.ava.json
+++ b/tsconfig.ava.json
@@ -1,7 +1,7 @@
 {
   "extends": "./tsconfig.json",
+  "exclude": ["node_modules"],
   "ts-node": {
-    "preferTsExts": true,
     "transpileOnly": true
   }
 }