diff --git a/README.md b/README.md
index 105d532a..f20b3931 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ First, in your application code, import the "base" build rather than the "standa
 Then, inline the code from `dist/polyfill.js` into the `<head>` of your pages. This step is important since the "base" build will error if the polyfill code has not been added.
 
 ```html
-<!DOCTYPE html>
+<!doctype html>
 <html>
   <head>
     <script>
diff --git a/src/types.ts b/src/types.ts
index 3737ff83..6346f65e 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -66,7 +66,7 @@ declare global {
 
   interface Performance {
     getEntriesByType<K extends keyof PerformanceEntryMap>(
-      type: K
+      type: K,
     ): PerformanceEntryMap[K][];
   }
 
diff --git a/test/unit/attribution-test.js b/test/unit/attribution-test.js
index be6f2be0..d96c75b2 100644
--- a/test/unit/attribution-test.js
+++ b/test/unit/attribution-test.js
@@ -18,7 +18,7 @@ import {
 describe('index', () => {
   it('exports Web Vitals metrics functions', () => {
     [onCLS, onFCP, onFID, onINP, onLCP, onTTFB].forEach((onFn) =>
-      assert(typeof onFn === 'function')
+      assert(typeof onFn === 'function'),
     );
   });
 
diff --git a/test/unit/index-test.js b/test/unit/index-test.js
index 84bda062..e85289aa 100644
--- a/test/unit/index-test.js
+++ b/test/unit/index-test.js
@@ -18,7 +18,7 @@ import {
 describe('index', () => {
   it('exports Web Vitals metrics functions', () => {
     [onCLS, onFCP, onFID, onINP, onLCP, onTTFB].forEach((onFn) =>
-      assert(typeof onFn === 'function')
+      assert(typeof onFn === 'function'),
     );
   });
 
