diff --git a/test/unit/polymer.properties-mixin.html b/test/unit/polymer.properties-mixin.html
index 3943c01660..9424e295c8 100644
--- a/test/unit/polymer.properties-mixin.html
+++ b/test/unit/polymer.properties-mixin.html
@@ -17,8 +17,25 @@
   <script type="module" src="../../lib/mixins/properties-mixin.js"></script>
   <body>
 
-  <dom-module id="my-element">
-    <script type="module">
+  <test-fixture id="my-element-attr">
+    <template>
+      <my-element prop="attr" camelCase="camelCase"></my-element>
+    </template>
+  </test-fixture>
+
+  <test-fixture id="sub-element-attr">
+    <template>
+      <sub-element prop="attr" prop2="attr" camelCase="camelCase" camelCase2="camelCase2" custom-observed-attr="custom"></sub-element>
+    </template>
+  </test-fixture>
+
+  <test-fixture id="sub-mixin-element-attr">
+    <template>
+      <sub-mixin-element prop="attr" prop2="attr" prop3="attr" mixin="5" custom-observed-attr="custom"></sub-mixin-element>
+    </template>
+  </test-fixture>
+
+  <script type="module">
 import { PropertiesMixin } from '../../lib/mixins/properties-mixin.js';
 
 class Glar {}
@@ -97,13 +114,6 @@
 customElements.define('my-element', MyElement);
 
 window.MyElement = MyElement;
-</script>
-  </dom-module>
-
-
-  <dom-module id="sub-element">
-    <script type="module">
-import '../../lib/mixins/properties-mixin.js';
 
 class SubElement extends window.MyElement {
 
@@ -141,12 +151,6 @@
 customElements.define('sub-element', SubElement);
 
 window.SubElement = SubElement;
-</script>
-  </dom-module>
-
-  <dom-module id="sub-mixin-element">
-    <script type="module">
-import '../../lib/mixins/properties-mixin.js';
 
 function MyMixin(Base) {
   return class extends Base {
@@ -208,29 +212,7 @@
 customElements.define('sub-mixin-element', SubMixinElement);
 
 window.SubMixinElement = SubMixinElement;
-</script>
-  </dom-module>
-
-  <test-fixture id="my-element-attr">
-    <template>
-      <my-element prop="attr" camelCase="camelCase"></my-element>
-    </template>
-  </test-fixture>
-
-  <test-fixture id="sub-element-attr">
-    <template>
-      <sub-element prop="attr" prop2="attr" camelCase="camelCase" camelCase2="camelCase2" custom-observed-attr="custom"></sub-element>
-    </template>
-  </test-fixture>
 
-  <test-fixture id="sub-mixin-element-attr">
-    <template>
-      <sub-mixin-element prop="attr" prop2="attr" prop3="attr" mixin="5" custom-observed-attr="custom"></sub-mixin-element>
-    </template>
-  </test-fixture>
-
-  <script type="module">
-import '../../lib/mixins/properties-mixin.js';
 suite('class extends Polymer.PropertiesMixin', function() {
 
   let el;
