diff --git a/.projenrc.js b/.projenrc.js
index cb44de7..4a7c159 100644
--- a/.projenrc.js
+++ b/.projenrc.js
@@ -22,6 +22,12 @@ const project = new AwsCdkTypeScriptApp({
     'jsii-release',
     'prettier',
   ],
+
+  jestOptions: {
+    jestConfig: {
+      collectCoverageFrom: ['src/**/*.ts'],
+    },
+  },
 });
 
 // include prettier
diff --git a/package.json b/package.json
index b4a982d..74b3ff3 100644
--- a/package.json
+++ b/package.json
@@ -64,6 +64,9 @@
   },
   "version": "0.0.0",
   "jest": {
+    "collectCoverageFrom": [
+      "src/**/*.ts"
+    ],
     "testMatch": [
       "**/__tests__/**/*.ts?(x)",
       "**/?(*.)+(spec|test).ts?(x)"