diff --git a/napi/minify/package.json b/napi/minify/package.json
index 2f32db712fd64..4dad3bd63ba30 100644
--- a/napi/minify/package.json
+++ b/napi/minify/package.json
@@ -4,7 +4,7 @@
   "scripts": {
     "build-dev": "napi build --no-dts-cache --platform",
     "build": "napi build --no-dts-cache --platform --release",
-    "test": "vitest --typecheck run ./test"
+    "test": "vitest --typecheck run ./test && tsc"
   },
   "napi": {
     "binaryName": "minify",
diff --git a/napi/minify/tsconfig.json b/napi/minify/tsconfig.json
new file mode 100644
index 0000000000000..c878e86a202a1
--- /dev/null
+++ b/napi/minify/tsconfig.json
@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "module": "Preserve",
+    "moduleResolution": "Bundler",
+    "noEmit": true,
+    "target": "ESNext"
+  }
+}
diff --git a/napi/parser/package.json b/napi/parser/package.json
index ec389d30fa4d6..740dab730b2f4 100644
--- a/napi/parser/package.json
+++ b/napi/parser/package.json
@@ -4,7 +4,7 @@
   "scripts": {
     "build-dev": "napi build --no-dts-cache --platform --js bindings.js",
     "build": "napi build --no-dts-cache --platform --js bindings.js --release",
-    "test": "vitest --typecheck run ./test",
+    "test": "vitest --typecheck run ./test && tsc",
     "bench": "vitest bench --run ./bench.bench.mjs"
   },
   "napi": {
diff --git a/napi/parser/tsconfig.json b/napi/parser/tsconfig.json
index abb88a3e0ec3e..c878e86a202a1 100644
--- a/napi/parser/tsconfig.json
+++ b/napi/parser/tsconfig.json
@@ -2,6 +2,7 @@
   "compilerOptions": {
     "module": "Preserve",
     "moduleResolution": "Bundler",
+    "noEmit": true,
     "target": "ESNext"
   }
 }
diff --git a/napi/transform/index.d.ts b/napi/transform/index.d.ts
index 4e96f150df9b1..7b65ff4114555 100644
--- a/napi/transform/index.d.ts
+++ b/napi/transform/index.d.ts
@@ -218,6 +218,17 @@ export declare const enum Severity {
   Advice = 'Advice'
 }
 
+export interface SourceMap {
+  file?: string
+  mappings: string
+  names: Array<string>
+  sourceRoot?: string
+  sources: Array<string>
+  sourcesContent?: Array<string>
+  version: number
+  x_google_ignoreList?: Array<number>
+}
+
 /**
  * Transpile a JavaScript or TypeScript into a target ECMAScript version.
  *
diff --git a/napi/transform/package.json b/napi/transform/package.json
index dc6951f9dca15..12a0fe2e29ec2 100644
--- a/napi/transform/package.json
+++ b/napi/transform/package.json
@@ -4,7 +4,7 @@
   "scripts": {
     "build-dev": "napi --no-dts-cache build --platform",
     "build": "napi --no-dts-cache build --platform --release",
-    "test": "vitest --typecheck run ./test"
+    "test": "vitest --typecheck run ./test && tsc"
   },
   "napi": {
     "binaryName": "transform",
diff --git a/napi/transform/tsconfig.json b/napi/transform/tsconfig.json
index abb88a3e0ec3e..c878e86a202a1 100644
--- a/napi/transform/tsconfig.json
+++ b/napi/transform/tsconfig.json
@@ -2,6 +2,7 @@
   "compilerOptions": {
     "module": "Preserve",
     "moduleResolution": "Bundler",
+    "noEmit": true,
     "target": "ESNext"
   }
 }