State viewport height assumption and make a test fit that definition

This matches the changes made to the img element test in #7644.
diff --git a/docs/writing-tests/assumptions.md b/docs/writing-tests/assumptions.md
index 5afa416..9a7bf8b 100644
--- a/docs/writing-tests/assumptions.md
+++ b/docs/writing-tests/assumptions.md
@@ -4,7 +4,7 @@
 tests can freely rely on these assumptions being true:
 
  * The device is a full-color device.
- * The device has a viewport width of at least 800px.
+ * The device has viewport dimensions of at least 800px by 600px.
  * The UA imposes no minimum font size.
  * The `medium` `font-size` computes to 16px.
  * The canvas background is `white`.
diff --git a/html/semantics/embedded-content/the-object-element/usemap-casing.html b/html/semantics/embedded-content/the-object-element/usemap-casing.html
index 114a472..9431c73 100644
--- a/html/semantics/embedded-content/the-object-element/usemap-casing.html
+++ b/html/semantics/embedded-content/the-object-element/usemap-casing.html
@@ -8,54 +8,54 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
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+<map name="sanityCheck"><area shape="rect" coords="0,0,100,100"></map>
+
+<object data="/images/threecolors.png" usemap="#sImPlE" width="100" height="100"></object>
+<map name="simple"><area shape="rect" coords="0,0,100,100"></map>
+<map name="SIMPLE"><area shape="rect" coords="0,0,100,100"></map>
+
+<object data="/images/threecolors.png" usemap="#paSSfield-killroyß" width="100" height="100"></object>
+<map name="passfield-killroyß"><area shape="rect" coords="0,0,100,100"></map>
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+<map name="passfİeld-killroyß"><area shape="rect" coords="0,0,100,100"></map>
+
+<object data="/images/threecolors.png" usemap="#глупый" width="100" height="100"></object>
+<map name="глупы&#x438;&#x306;"><area shape="rect" coords="0,0,100,100"></map>
+<map name="ГЛУПЫЙ"><area shape="rect" coords="0,0,100,100"></map>
+<map name="ГЛУПЫ&#x418;&#x306;"><area shape="rect" coords="0,0,100,100"></map>
+
+<object data="/images/threecolors.png" usemap="#åωk" width="100" height="100"></object>
+<map name="ÅΩK"><area shape="rect" coords="0,0,100,100"></map>
+<map name="&#x212b;ωk"><area shape="rect" coords="0,0,100,100"></map>
+<map name="å&#x2126;k"><area shape="rect" coords="0,0,100,100"></map>
+<map name="åω&#x212a;"><area shape="rect" coords="0,0,100,100"></map>
+
+<object data="/images/threecolors.png" usemap="#blah1" width="100" height="100"></object>
+<map name="blah&#x2460;"><area shape="rect" coords="0,0,100,100"></map>
+<map name="bl&#x24b6;h1"><area shape="rect" coords="0,0,100,100"></map>
+<map name="bl&#x24d0;h1"><area shape="rect" coords="0,0,100,100"></map>
+
+<object data="/images/threecolors.png" usemap="#t&Eacute;dz5アパートFi" width="100" height="100"></object>
+<map name="T&Eacute;DZ5アパートFi"><area shape="rect" coords="0,0,100,100"></map>
+<map name="T&eacute;&#x01F1;&#x2075;アパートFi"><area shape="rect" coords="0,0,100,100"></map>
+<map name="t&Eacute;dz5&#x3300;Fi"><area shape="rect" coords="0,0,100,100"></map>
+<map name="t&Eacute;dz5&#x30A2;&#x30CF;&#x309A;&#x30FC;&#x30C8;Fi"><area shape="rect" coords="0,0,100,100"></map>
+<map name="T&Eacute;DZ⁵アパートFi"><area shape="rect" coords="0,0,100,100"></map>
+<map name="T&Eacute;DZ5アパートfi"><area shape="rect" coords="0,0,100,100"></map>
+
+<object data="/images/threecolors.png" usemap="#ΣΣ" width="100" height="100"></object>
+<map name="σς"><area shape="rect" coords="0,0,100,100"></map>
+
 <div id="log"></div>
 
-<object data="/images/threecolors.png" usemap="#sanityCheck" width="300" height="300"></object>
-<map name="sanityCheck"><area shape="rect" coords="0,0,300,300"></map>
-
-<object data="/images/threecolors.png" usemap="#sImPlE" width="300" height="300"></object>
-<map name="simple"><area shape="rect" coords="0,0,300,300"></map>
-<map name="SIMPLE"><area shape="rect" coords="0,0,300,300"></map>
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-<map name="глупы&#x438;&#x306;"><area shape="rect" coords="0,0,300,300"></map>
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-<map name="ГЛУПЫ&#x418;&#x306;"><area shape="rect" coords="0,0,300,300"></map>
-
-<object data="/images/threecolors.png" usemap="#åωk" width="300" height="300"></object>
-<map name="ÅΩK"><area shape="rect" coords="0,0,300,300"></map>
-<map name="&#x212b;ωk"><area shape="rect" coords="0,0,300,300"></map>
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-<map name="åω&#x212a;"><area shape="rect" coords="0,0,300,300"></map>
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-<map name="T&Eacute;DZ5アパートfi"><area shape="rect" coords="0,0,300,300"></map>
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-<map name="σς"><area shape="rect" coords="0,0,300,300"></map>
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 <script>
 "use strict";
 setup({ explicit_done: true });