diff --git a/packages/workers-shared/asset-worker/tests/html-handling.test.ts b/packages/workers-shared/asset-worker/tests/html-handling.test.ts
index 3ec0b9690476..ef9f6bb995db 100644
--- a/packages/workers-shared/asset-worker/tests/html-handling.test.ts
+++ b/packages/workers-shared/asset-worker/tests/html-handling.test.ts
@@ -17,6 +17,7 @@ const existsMock = (fileList: Set<string>) => {
 			if (fileList.has(pathname)) {
 				return pathname;
 			}
+			return null;
 		}
 	);
 };
@@ -33,7 +34,7 @@ const testSuites = [
 	},
 ];
 
-describe.each(testSuites)("$title", ({ title, suite }) => {
+describe.each(testSuites)("$title", ({ suite }) => {
 	beforeEach(() => {
 		vi.mocked(getAssetWithMetadataFromKV).mockImplementation(
 			() =>
@@ -64,7 +65,7 @@ describe.each(testSuites)("$title", ({ title, suite }) => {
 			async ({ files, requestPath, matchedFile, finalPath }) => {
 				existsMock(new Set(files));
 				const request = new IncomingRequest(BASE_URL + requestPath);
-				let response = await SELF.fetch(request);
+				const response = await SELF.fetch(request);
 				if (matchedFile && finalPath) {
 					expect(getAssetWithMetadataFromKV).toBeCalledTimes(1);
 					expect(getAssetWithMetadataFromKV).toBeCalledWith(
diff --git a/packages/workers-shared/asset-worker/tests/test-cases/encoding-test-cases.ts b/packages/workers-shared/asset-worker/tests/test-cases/encoding-test-cases.ts
index 6cf6a23d5053..34436418b2f0 100644
--- a/packages/workers-shared/asset-worker/tests/test-cases/encoding-test-cases.ts
+++ b/packages/workers-shared/asset-worker/tests/test-cases/encoding-test-cases.ts
@@ -1,4 +1,4 @@
-import { TestCase } from "./test-case";
+import type { TestCase } from "./test-case";
 
 export const encodingTestCases: {
 	html_handling:
diff --git a/packages/workers-shared/asset-worker/tests/test-cases/html-handling-test-cases.ts b/packages/workers-shared/asset-worker/tests/test-cases/html-handling-test-cases.ts
index 14ec704857a5..e675d9e5e304 100644
--- a/packages/workers-shared/asset-worker/tests/test-cases/html-handling-test-cases.ts
+++ b/packages/workers-shared/asset-worker/tests/test-cases/html-handling-test-cases.ts
@@ -1,4 +1,4 @@
-import { TestCase } from "./test-case";
+import type { TestCase } from "./test-case";
 
 export const htmlHandlingTestCases: {
 	html_handling:
diff --git a/packages/workers-shared/package.json b/packages/workers-shared/package.json
index dafd66c46833..a33971a07130 100644
--- a/packages/workers-shared/package.json
+++ b/packages/workers-shared/package.json
@@ -32,7 +32,7 @@
 		"check:type": "pnpm run check:type:package && pnpm run check:type:asset-worker && pnpm run check:type:router-worker",
 		"check:type:asset-worker": "tsc -p ./asset-worker/tsconfig.json && tsc -p ./asset-worker/tests/tsconfig.json",
 		"check:type:package": "tsc -p ./tsconfig.json && tsc -p ./tsconfig.node.json",
-		"check:type:router-worker": "tsc -p ./router-worker/tsconfig.json && tsc -p ./router-worker/tests/tsconfig.json",
+		"check:type:router-worker": "tsc -p ./router-worker/tsconfig.json",
 		"clean": "rimraf dist",
 		"deploy": "pnpm run deploy:router-worker && pnpm run deploy:asset-worker",
 		"deploy:asset-worker": "CLOUDFLARE_API_TOKEN=$WORKERS_DEPLOY_AND_CONFIG_CLOUDFLARE_API_TOKEN pnpx wrangler versions upload --experimental-versions -c asset-worker/wrangler.toml",
diff --git a/packages/workers-shared/tsconfig.json b/packages/workers-shared/tsconfig.json
index cd731beefbe6..609d161c8048 100644
--- a/packages/workers-shared/tsconfig.json
+++ b/packages/workers-shared/tsconfig.json
@@ -12,6 +12,6 @@
 		"strict": true,
 		"skipLibCheck": true
 	},
-	"include": ["utils/*.ts"],
+	"include": ["utils/*.ts", "index.ts"],
 	"exclude": ["scripts/**"]
 }