diff --git a/src/test/html/summit-bad-page.html b/src/test/html/summit-bad-page.html
new file mode 100644
index 00000000000..5ac3c134d99
--- /dev/null
+++ b/src/test/html/summit-bad-page.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>crash page</title>
+  </head>
+  <body>
+    <audio>
+      <source src="horse.ogg" type="audio/ogg">
+      <source src="horse.mp3" type="audio/mpeg">
+    </audio>
+    <pre>pre</pre>
+  </body>
+</html>
diff --git a/src/test/html/summit-crash.html b/src/test/html/summit-crash.html
index 7086941d0d5..17702018b63 100644
--- a/src/test/html/summit-crash.html
+++ b/src/test/html/summit-crash.html
@@ -1,12 +1,15 @@
+<!DOCTYPE html>
 <html>
   <head>
-    <title>Summit demo crash page</title>
+    <style>
+      body {
+        font-size: 75px;
+        text-align: center;
+        padding: 50px 10px;
+      }
+    </style>
   </head>
   <body>
-    <audio>
-      <source src="horse.ogg" type="audio/ogg">
-      <source src="horse.mp3" type="audio/mpeg">
-    </audio>
-    <pre>pre</pre>
+    <a href="summit-bad-page.html">here be dragons</a>
   </body>
 </html>
diff --git a/src/test/html/summit-fail.html b/src/test/html/summit-fail.html
new file mode 100644
index 00000000000..53c14a2ee5b
--- /dev/null
+++ b/src/test/html/summit-fail.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+      html {
+        background-color: #ccc;
+        font-size: 50px;
+      }
+      div.frame {
+        text-align: center;
+        float: left;
+        width: 310px;
+        height: 400px;
+      }
+      iframe {
+        width: 300px;
+        height: 300px;
+        border: solid 1px black;
+        display: block;
+        background-color: white;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="frame">
+      <iframe id="frameone" sandbox="allow-scripts" src="summit-two.html">
+      </iframe>
+      frame one
+    </div>
+    <div class="frame">
+      <iframe id="frametwo" sandbox="allow-scripts" src="summit-crash.html">
+      </iframe>
+      frame two
+    </div>
+  </body>
+</html>
diff --git a/src/test/html/summit-link.html b/src/test/html/summit-link.html
deleted file mode 100644
index 77d1e704960..00000000000
--- a/src/test/html/summit-link.html
+++ /dev/null
@@ -1,9 +0,0 @@
-<html>
-<head>
-  <title>Summit page linking to the crash page</title>
-</head>
-
-<body>
-  <a href="summit-crash.html">Load a crashing page</a>
-</body>
-</html>
diff --git a/src/test/html/summit-one.html b/src/test/html/summit-one.html
new file mode 100644
index 00000000000..7dbaeddc448
--- /dev/null
+++ b/src/test/html/summit-one.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+      body {
+        margin: 0;
+      }
+      p {
+        margin: 0;
+        padding: 0;
+        font-size: 0px
+      }
+    </style>
+  </head>
+  <body>
+    <p><img src="longcattop.png"/></p>
+    <p><img src="longcatmid.png"/></p>
+    <p><img src="longcatbot.png"/></p>
+    <script>
+      var longcats = window.document.getElementsByTagName("img");
+      var longcat_top = longcats[0];
+      var longcat_mid = longcats[1];
+      var longcat_bot = longcats[2];
+
+      function wait_for_img_load(f) {
+        if (longcat_top.width != 0 && longcat_mid.width != 0 && longcat_bot.width != 0) {
+          f();
+        } else {
+          window.setTimeout(function() { wait_for_img_load(f) }, 1);
+        }
+      }
+
+      wait_for_img_load(function() {
+        var count = 0;
+        function elongate() {
+          var height = Math.round((Math.cos(count + Math.PI) + 1) * 45 + 20);
+          count += 0.2;
+          longcat_mid.height = height;
+          longcat_mid.width = 600;
+          window.setTimeout(function() { elongate() }, 50);
+        }
+        elongate();
+      });
+    </script>
+  </body>
+</html>
diff --git a/src/test/html/summit-three.html b/src/test/html/summit-three.html
new file mode 100644
index 00000000000..a4def31fb88
--- /dev/null
+++ b/src/test/html/summit-three.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+    body {
+      font-size: 30px;
+    }
+    </style>
+  </head>
+  <body>
+    <div></div>
+
+    <script>
+function Matrix(ary) {
+    this.mtx = ary
+    this.height = ary.length;
+    this.width = ary[0].length;
+}
+
+Matrix.prototype.toString = function() {
+    var s = []
+    for (var i = 0; i < this.mtx.length; i++)
+        s.push( this.mtx[i].join(",") );
+    return s.join("\n");
+}
+
+Matrix.prototype.mult = function(other) {
+    if (this.width != other.height) {
+        throw "error: incompatible sizes";
+    }
+
+    var result = [];
+    for (var i = 0; i < this.height; i++) {
+        result[i] = [];
+        for (var j = 0; j < other.width; j++) {
+            var sum = 0;
+            for (var k = 0; k < this.width; k++) {
+                sum += this.mtx[i][k] * other.mtx[k][j];
+            }
+            result[i][j] = sum;
+        }
+    }
+    return new Matrix(result);
+}
+
+function run() {
+  var elems = [];
+  for (var i = 0; i < 900; i++) {
+    elems.push(i);
+  }
+  var outer = [];
+  for (var i = 0; i < 900; i++) {
+    outer.push(elems);
+  }
+  var a = new Matrix(outer);
+  var b = new Matrix(outer);
+  var result = a.mult(b);
+}
+
+function say(msg) {
+  var div = document.getElementsByTagName('div')[0];
+  var text = document.createTextNode(msg);
+  var p = document.createElement("p");
+  p.appendChild(text);
+  div.appendChild(p);
+}
+
+//say("multiplying 900x900 matrix");
+setTimeout(function forever() {
+  var now = new Date();
+  run();
+  say("mult 900x900 in " + (new Date() - now));
+  setTimeout(forever, 5000);
+}, 1000);
+    </script>
+  </body>
+</html>
diff --git a/src/test/html/summit-two.html b/src/test/html/summit-two.html
new file mode 100644
index 00000000000..7a62296b130
--- /dev/null
+++ b/src/test/html/summit-two.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+      body {
+        margin: 0;
+        padding: 30px 47px;
+      }
+      img {
+        width: 206px;
+        height: 206px;
+      }
+    </style>
+  </head>
+  <body>
+    <p><img></p>
+    <script>
+var index = 0;
+function change() {
+    document.getElementsByTagName("img")[0].src = "rust-" + (index * 45) + ".png";
+    index = (index + 1) % 8;
+    setTimeout(change, 100);
+}
+change();
+    </script>
+  </body>
+</html>
diff --git a/src/test/html/summit.html b/src/test/html/summit.html
deleted file mode 100644
index a50f18ea016..00000000000
--- a/src/test/html/summit.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<html>
-  <head>
-    <title>Summit demo page</title>
-  </head>
-<body>
-  <iframe sandbox="allow-scripts" src="filmstrip.html" style="display:block; border: 1px solid black; width: 200px; height: 200px"
-          frameborder="yes" scrolling="yes"></iframe>
-
-  <iframe sandbox="allow-scripts" src="longcat.html" style="display:block; border: 1px solid black; width: 600px; height: 600px"
-          frameborder="yes" scrolling="yes"></iframe>
-
-  <iframe sandbox="allow-scripts" src="test_sandboxed_iframe.html"
-          style="display:block; border: 1px solid black; width: 300px; height: 300px">
-  </iframe>
-
-  <iframe src="summit-link.html" style="display:block; border: 1px solid black; width: 300px; height: 300px"
-          frameborder="yes" scrolling="yes">
-  </iframe>
-</body>
-</html>
diff --git a/src/test/html/summit2.html b/src/test/html/summit2.html
new file mode 100644
index 00000000000..caac423845f
--- /dev/null
+++ b/src/test/html/summit2.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+      html {
+        background-color: #ccc;
+        font-size: 50px;
+      }
+      div.frame {
+        text-align: center;
+        float: left;
+        width: 310px;
+        height: 400px;
+      }
+      iframe {
+        width: 300px;
+        height: 300px;
+        border: solid 1px black;
+        display: block;
+        background-color: white;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="frame">
+      <iframe id="frameone" sandbox="allow-scripts" src="summit-two.html">
+      </iframe>
+      frame one
+    </div>
+    <div class="frame">
+      <iframe id="frametwo" sandbox="allow-scripts" src="summit-three.html">
+      </iframe>
+      frame two
+    </div>
+  </body>
+</html>
diff --git a/src/test/html/summit3.html b/src/test/html/summit3.html
new file mode 100644
index 00000000000..3b7445d7ab0
--- /dev/null
+++ b/src/test/html/summit3.html
@@ -0,0 +1,63 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <style>
+      html {
+        background-color: #ccc;
+        font-size: 50px;
+      }
+      .frame {
+        text-align: center;
+      }
+      .left {
+        float: left;
+      }
+      .narrow {
+        width: 300px;
+      }
+      .wide {
+        width: 600px;
+      }
+      .short {
+        height: 360px;
+      }
+      .tall {
+        height: 800px;
+      }
+      iframe {
+        width: 300px;
+        border: solid 1px black;
+        display: block;
+        background-color: white;
+      }
+      .wide iframe {
+        width: 600px;
+      }
+      .tall iframe {
+        height: 660px;
+      }
+      .short iframe {
+        height: 300px;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="frame tall left wide">
+      <iframe id="frameone" sandbox="allow-scripts" src="summit-one.html">
+      </iframe>
+      frame one
+    </div>
+    <div class="left">
+      <div class="frame short narrow">
+        <iframe id="frametwo" sandbox="allow-scripts" src="summit-two.html">
+        </iframe>
+        frame two
+      </div>
+      <div class="frame short narrow">
+        <iframe id="framethree" sandbox="allow-scripts" src="summit-three.html">
+        </iframe>
+        frame three
+      </div>
+    </div>
+  </body>
+</html>
