diff --git a/ember-utils/src/services/extended-store.ts b/ember-utils/src/services/extended-store.ts
index 35a7ba0..791c8f9 100644
--- a/ember-utils/src/services/extended-store.ts
+++ b/ember-utils/src/services/extended-store.ts
@@ -26,7 +26,10 @@ export default class ExtendedStoreService extends Service {
     return record;
   }
 
-  public peekOrFail<K extends keyof ModelRegistry>(recordType: K, id: string) {
+  public peekOrFail<K extends keyof ModelRegistry>(
+    recordType: K,
+    id: string,
+  ): ModelRegistry[K] {
     const record = this.store.peekRecord(recordType, id);
     if (!record) {
       throw new Error(
diff --git a/test-app/app/controllers/docs/helpers/date-format.ts b/test-app/app/controllers/docs/helpers/date-format.ts
index 3eaa66d..7973251 100644
--- a/test-app/app/controllers/docs/helpers/date-format.ts
+++ b/test-app/app/controllers/docs/helpers/date-format.ts
@@ -1,5 +1,5 @@
 import Controller from '@ember/controller';
 
 export default class DocsHelpersDateFormatController extends Controller {
-    date = new Date();
+  date = new Date();
 }
diff --git a/test-app/tests/integration/helpers/translate-country-test.ts b/test-app/tests/integration/helpers/translate-country-test.ts
index b228a53..2d3e3ce 100644
--- a/test-app/tests/integration/helpers/translate-country-test.ts
+++ b/test-app/tests/integration/helpers/translate-country-test.ts
@@ -6,7 +6,11 @@ import { hbs } from 'ember-cli-htmlbars';
 module('Integration | Helper | translate-country', function (hooks) {
   setupRenderingTest(hooks);
 
-  function setCountries(this: TestContext, countries: string[] | string, language?: string) {
+  function setCountries(
+    this: TestContext,
+    countries: string[] | string,
+    language?: string,
+  ) {
     this.set('countries', countries);
     this.set('language', language);
     return countries;