diff --git a/package.json b/package.json
index 32afcef..8d3e4b5 100644
--- a/package.json
+++ b/package.json
@@ -55,6 +55,9 @@
     "transform": {
       "^.+\\.(t|j)s$": "ts-jest"
     },
+    "collectCoverageFrom": [
+      "**/*.(t|j)s"
+    ],
     "coverageDirectory": "../coverage",
     "testEnvironment": "node"
   }