diff --git a/lerna.json b/lerna.json
index e8cd581c98..d0f0bd23c5 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,6 +1,6 @@
 {
   "$schema": "node_modules/lerna/schemas/lerna-schema.json",
-  "version": "3.2.41",
+  "version": "3.2.42",
   "npmClient": "yarn",
   "concurrency": 20,
   "command": {
diff --git a/packages/backend-core/package.json b/packages/backend-core/package.json
index 3e1b5f324b..1ab05cd14b 100644
--- a/packages/backend-core/package.json
+++ b/packages/backend-core/package.json
@@ -21,7 +21,7 @@
   "scripts": {
     "prebuild": "rimraf dist/",
     "prepack": "cp package.json dist",
-    "build": "node ./scripts/build.js && tsc -p tsconfig.build.json --emitDeclarationOnly --paths null",
+    "build": "node ./scripts/build.js && tsc -p tsconfig.build.json --emitDeclarationOnly --paths null && tsc -p tsconfig.test.json --paths null",
     "build:dev": "yarn prebuild && tsc --build --watch --preserveWatchOutput",
     "build:oss": "node ./scripts/build.js",
     "check:types": "tsc -p tsconfig.json --noEmit --paths null",
diff --git a/packages/backend-core/tsconfig.test.json b/packages/backend-core/tsconfig.test.json
new file mode 100644
index 0000000000..0e3e7a79b2
--- /dev/null
+++ b/packages/backend-core/tsconfig.test.json
@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.build.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "sourceMap": true
+  },
+  "include": ["tests/**/*.js", "tests/**/*.ts"],
+  "exclude": ["node_modules", "dist"]
+}