diff --git a/README.md b/README.md
index 4180da7..e46157d 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 Tiniest JavaScript unit testing library
 =======================================
 
-This is an in-browser JavaScript library I've been using for years. It's so small and simple that it never occured to me to open source it until I saw all the overly complicated alternatives that are out there.
+This is an in-browser JavaScript library I've been using for years. It's so small and simple that it never occurred to me to open source it until I saw all the overly complicated alternatives that are out there.
 
 If you're looking for a JavaScript library full of features or install guides that say things like `grunt`, `npm` or `bower`, you've come to the wrong place. Sorry, this probably isn't for you. Move along now.
 
diff --git a/example/adder-test.html b/example/adder-test.html
index 040f155..ef77ac0 100644
--- a/example/adder-test.html
+++ b/example/adder-test.html
@@ -1,16 +1,29 @@
+<!doctype html>
+<html lang="en">
+
+<head>
+<meta charset="utf-8" />
+<title>jstinytest &mdash; Adder example</title>
+</head>
+
+<body>
+
 <script src="../tinytest.js"></script>
 <script src="adder.js"></script>
 <script>
 tests({
 
   'adds numbers': function() {
-    eq(6, add(2, 4));
-    eq(6.6, add(2.6, 4));
+    assertEquals(6, add(2, 4));
+    assertEquals(6.6, add(2.6, 4));
   },
 
   'subtracts numbers': function() {
-    eq(-2, add(2, -4));
+    assertEquals(-2, add(2, -4));
   },
 
 });
 </script>
+
+</body>
+</html>
diff --git a/tinytest.js b/tinytest.js
index 183d0eb..1d52fac 100644
--- a/tinytest.js
+++ b/tinytest.js
@@ -37,6 +37,7 @@
  * -Joe Walnes
  * MIT License. See https://github.com/joewalnes/jstinytest/
  */
+"use strict";
 const TinyTest = {
 
     run: function(tests) {
@@ -71,13 +72,13 @@ const TinyTest = {
 
     assertEquals: function(expected, actual) {
         if (expected != actual) {
-            throw new Error('assertEquals() "' + expected + '" != "' + actual + '"');
+            throw new Error(`assertEquals() "${expected}" != "${actual}"`);
         }
     },
 
     assertStrictEquals: function(expected, actual) {
         if (expected !== actual) {
-            throw new Error('assertStrictEquals() "' + expected + '" !== "' + actual + '"');
+            throw new Error(`assertStrictEquals() "${expected}" !== "${actual}"`);
         }
     },
 
