diff --git a/src/config.test.ts b/src/config.test.ts
index cb90738..d3932a8 100644
--- a/src/config.test.ts
+++ b/src/config.test.ts
@@ -43,10 +43,10 @@ radarr: {}
 
   test("should transform without error - quality_profiles instead of assign_scores_to", async () => {
     const cloned = cloneWithJSON(config);
-    const instance = cloned.sonarr!["instance1"];
-    const { assign_scores_to, quality_profiles, ...rest } = instance.custom_formats![0];
+    const instance = cloned.sonarr!["instance1"]!;
+    const cF = instance.custom_formats![0];
 
-    instance.custom_formats![0] = { ...rest, quality_profiles: assign_scores_to ?? quality_profiles };
+    instance.custom_formats![0] = { ...cF, quality_profiles: cF?.assign_scores_to, assign_scores_to: undefined };
 
     const transformed = transformConfig(config);
     expect(transformed).not.toBeNull();
diff --git a/src/util.test.ts b/src/util.test.ts
index 026a256..789eec1 100644
--- a/src/util.test.ts
+++ b/src/util.test.ts
@@ -154,7 +154,7 @@ describe("SizeSpecification", async () => {
 
   test("mismatch required", async () => {
     const copied: typeof custom = JSON.parse(JSON.stringify(custom));
-    copied.specifications![0].required = true;
+    copied.specifications![0]!.required = true;
 
     const result = compareCustomFormats(serverResponse, mapImportCfToRequestCf(toCarrCF(copied)));
     expect(result.equal).toBe(false);
@@ -162,7 +162,7 @@ describe("SizeSpecification", async () => {
 
   test("max differ", async () => {
     const copied: typeof custom = JSON.parse(JSON.stringify(custom));
-    (copied.specifications![0].fields as TrashCFSpF).max = 100;
+    (copied.specifications![0]!.fields as TrashCFSpF).max = 100;
 
     const result = compareCustomFormats(serverResponse, mapImportCfToRequestCf(toCarrCF(copied)));
     expect(result.equal).toBe(false);
@@ -200,9 +200,9 @@ describe("compareImportCFs - general", async () => {
   test("should not diff for fields length equal length", async () => {
     const copied: typeof custom = JSON.parse(JSON.stringify(custom));
     const clonedServer = cloneWithJSON(serverResponse);
-    clonedServer.specifications![0].fields = [clonedServer.specifications![0].fields![0]];
+    clonedServer.specifications![0]!.fields = [clonedServer.specifications![0]!.fields![0]!];
 
-    expect(clonedServer.specifications![0].fields.length).toBe(1);
+    expect(clonedServer.specifications![0]!.fields.length).toBe(1);
 
     const result = compareCustomFormats(clonedServer, mapImportCfToRequestCf(toCarrCF(copied)));
     expect(result.equal).toBe(true);
@@ -210,12 +210,12 @@ describe("compareImportCFs - general", async () => {
 
   test("should diff for fields length if local is higher (should not happen normally)", async () => {
     const copied: typeof custom = JSON.parse(JSON.stringify(custom));
-    copied.specifications![0].fields!.exceptLanguage = false;
+    copied.specifications![0]!.fields!.exceptLanguage = false;
 
     const clonedServer = cloneWithJSON(serverResponse);
-    clonedServer.specifications![0].fields = [clonedServer.specifications![0].fields![0]];
+    clonedServer.specifications![0]!.fields = [clonedServer.specifications![0]!.fields![0]!];
 
-    expect(clonedServer.specifications![0].fields.length).toBe(1);
+    expect(clonedServer.specifications![0]!.fields.length).toBe(1);
 
     const result = compareCustomFormats(clonedServer, mapImportCfToRequestCf(toCarrCF(copied)));
     expect(result.equal).toBe(false);
@@ -224,10 +224,10 @@ describe("compareImportCFs - general", async () => {
   test("should diff for specifications length bigger on remote", async () => {
     const copied: typeof custom = JSON.parse(JSON.stringify(custom));
     const clonedServer = cloneWithJSON(serverResponse);
-    clonedServer.specifications![0].fields = [clonedServer.specifications![0].fields![0]];
-    clonedServer.specifications?.push(clonedServer.specifications![0]);
+    clonedServer.specifications![0]!.fields = [clonedServer.specifications![0]!.fields![0]!];
+    clonedServer.specifications?.push(clonedServer.specifications![0]!);
 
-    expect(clonedServer.specifications![0].fields.length).toBe(1);
+    expect(clonedServer.specifications![0]!.fields.length).toBe(1);
 
     const result = compareCustomFormats(clonedServer, mapImportCfToRequestCf(toCarrCF(copied)));
     expect(result.equal).toBe(false);
@@ -236,10 +236,10 @@ describe("compareImportCFs - general", async () => {
   test("should diff for specifications length smaller on remote", async () => {
     const copied: typeof custom = JSON.parse(JSON.stringify(custom));
     const clonedServer = cloneWithJSON(serverResponse);
-    clonedServer.specifications![0].fields = [clonedServer.specifications![0].fields![0]];
-    copied.specifications?.push(copied.specifications[0]);
+    clonedServer.specifications![0]!.fields = [clonedServer.specifications![0]!.fields![0]!];
+    copied.specifications?.push(copied.specifications[0]!);
 
-    expect(clonedServer.specifications![0].fields.length).toBe(1);
+    expect(clonedServer.specifications![0]!.fields.length).toBe(1);
 
     const result = compareCustomFormats(clonedServer, mapImportCfToRequestCf(toCarrCF(copied)));
     expect(result.equal).toBe(false);
@@ -248,9 +248,9 @@ describe("compareImportCFs - general", async () => {
   test("should not diff for specifications length equal", async () => {
     const copied: typeof custom = JSON.parse(JSON.stringify(custom));
     const clonedServer = cloneWithJSON(serverResponse);
-    clonedServer.specifications![0].fields = [clonedServer.specifications![0].fields![0]];
+    clonedServer.specifications![0]!.fields = [clonedServer.specifications![0]!.fields![0]!];
 
-    expect(clonedServer.specifications![0].fields.length).toBe(1);
+    expect(clonedServer.specifications![0]!.fields.length).toBe(1);
 
     const result = compareCustomFormats(clonedServer, mapImportCfToRequestCf(toCarrCF(copied)));
     expect(result.equal).toBe(true);
diff --git a/tests/e2e/demo-todo-app.spec.ts b/tests/e2e/demo-todo-app.spec.ts
index 4c465a9..1918f36 100644
--- a/tests/e2e/demo-todo-app.spec.ts
+++ b/tests/e2e/demo-todo-app.spec.ts
@@ -1,11 +1,11 @@
-import { test, expect, type Page } from "@playwright/test";
+import { expect, test, type Page } from "@playwright/test";
+
+const TODO_ITEMS = ["buy some cheese", "feed the cat", "book a doctors appointment"] as const;
 
 test.beforeEach(async ({ page }) => {
   await page.goto("https://demo.playwright.dev/todomvc");
 });
 
-const TODO_ITEMS = ["buy some cheese", "feed the cat", "book a doctors appointment"];
-
 test.describe("New Todo", () => {
   test("should allow me to add todo items", async ({ page }) => {
     // create a new todo locator
diff --git a/tsconfig.json b/tsconfig.json
index 085d0ae..34f4667 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,7 +2,8 @@
   "$schema": "https://json.schemastore.org/tsconfig",
   "compilerOptions": {
     "allowJs": true,
-    "baseUrl": ".",
+    // breaks esbuild import
+    // "baseUrl": ".",
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "isolatedModules": true,
@@ -17,7 +18,8 @@
     "skipLibCheck": true,
     "strict": true,
     "strictNullChecks": true,
-    "target": "ESNext"
+    "target": "ESNext",
+    "noEmit": true
   },
   "exclude": ["./dist"],
   "include": ["**/*.ts", "**/*.tsx"]