diff --git a/frontend/components/Document/Document.js b/frontend/components/Document/Document.js
index 9902fdfa..1bfd9e7c 100644
--- a/frontend/components/Document/Document.js
+++ b/frontend/components/Document/Document.js
@@ -3,48 +3,14 @@ import { toJS } from 'mobx';
 import { observer } from 'mobx-react';
 
 import PublishingInfo from 'components/PublishingInfo';
+import DocumentHtml from './components/DocumentHtml';
 
 import styles from './Document.scss';
 
-@observer
-class DocumentHtml extends React.Component {
-  static propTypes = {
-    html: PropTypes.string.isRequired,
-  }
-
-  componentDidMount = () => {
-    this.setExternalLinks();
-  }
-
-  componentDidUpdate = () => {
-    this.setExternalLinks();
-  }
-
-  setExternalLinks = () => {
-    const links = this.refs.content.querySelectorAll('a');
-    links.forEach(link => {
-      if (link.hostname !== window.location.hostname) {
-        link.target = '_blank'; // eslint-disable-line no-param-reassign
-      }
-    });
-  }
-
-  render() {
-    return (
-      <div
-        ref="content"
-        className={ styles.document }
-        dangerouslySetInnerHTML={{ __html: this.props.html }}
-        { ...this.props }
-      />
-    );
-  }
-}
-
 @observer
 class Document extends React.Component {
   static propTypes = {
-    document: React.PropTypes.object.isRequired,
+    document: PropTypes.object.isRequired,
   }
 
   render() {
@@ -64,6 +30,3 @@ class Document extends React.Component {
 }
 
 export default Document;
-export {
-  DocumentHtml,
-};
diff --git a/frontend/components/Document/Document.scss b/frontend/components/Document/Document.scss
index a7cbd244..a16145a9 100644
--- a/frontend/components/Document/Document.scss
+++ b/frontend/components/Document/Document.scss
@@ -4,87 +4,3 @@
   width: 100%;
   padding: 20px 20px 40px 20px;
 }
-
-.document {
-  h1, h2, h3, h4, h5, h6 {
-    :global {
-      .anchor {
-        visibility: hidden;
-        color: $gray;
-      }
-    }
-
-    &:hover {
-      :global {
-        .anchor {
-          visibility: visible;
-        }
-      }
-    }
-  }
-
-  ul {
-    padding-left: 1.5em;
-
-    ul {
-      margin: 0;
-    }
-  }
-
-  // pre {
-  //   box-shadow: 1px 1px 1px #f5f5f5;
-  // }
-
-  blockquote {
-    font-style: italic;
-    border-left: 2px solid $lightGray;
-    padding-left: 0.8em;
-  }
-
-  table {
-    width: 100%;
-    overflow: auto;
-    display: block;
-    border-spacing: 0;
-    border-collapse: collapse;
-
-    thead, tbody {
-      width: 100%;
-    }
-
-    thead {
-      tr {
-        border-bottom: 2px solid $lightGray;
-      }
-    }
-
-    tbody {
-      tr {
-        border-bottom: 1px solid $lightGray;
-      }
-    }
-
-    tr {
-      background-color: #fff;
-
-      // &:nth-child(2n) {
-      //   background-color: #f8f8f8;
-      // }
-    }
-
-    th, td {
-      text-align: left;
-      border: 1px 0 solid $lightGray;
-      padding: 5px 20px 5px 0;
-
-      &:last-child {
-        padding-right: 0;
-        width: 100%;
-      }
-    }
-
-    th {
-      font-weight: bold;
-    }
-  }
-}
diff --git a/frontend/components/Document/components/DocumentHtml/DocumentHtml.js b/frontend/components/Document/components/DocumentHtml/DocumentHtml.js
new file mode 100644
index 00000000..7f0a0a1f
--- /dev/null
+++ b/frontend/components/Document/components/DocumentHtml/DocumentHtml.js
@@ -0,0 +1,40 @@
+import React, { PropTypes } from 'react';
+import ReactDOM from 'react-dom';
+import { observer } from 'mobx-react';
+
+import styles from './DocumentHtml.scss';
+
+@observer
+class DocumentHtml extends React.Component {
+  static propTypes = {
+    html: PropTypes.string.isRequired,
+  }
+
+  componentDidMount = () => {
+    this.setExternalLinks();
+  }
+
+  componentDidUpdate = () => {
+    this.setExternalLinks();
+  }
+
+  setExternalLinks = () => {
+    const links = ReactDOM.findDOMNode(this).querySelectorAll('a');
+    links.forEach(link => {
+      if (link.hostname !== window.location.hostname) {
+        link.target = '_blank'; // eslint-disable-line no-param-reassign
+      }
+    });
+  }
+
+  render() {
+    return (
+      <div
+        className={ styles.document }
+        dangerouslySetInnerHTML={{ __html: this.props.html }}
+      />
+    );
+  }
+}
+
+export default DocumentHtml;
diff --git a/frontend/components/Document/components/DocumentHtml/DocumentHtml.scss b/frontend/components/Document/components/DocumentHtml/DocumentHtml.scss
new file mode 100644
index 00000000..e13d1ab3
--- /dev/null
+++ b/frontend/components/Document/components/DocumentHtml/DocumentHtml.scss
@@ -0,0 +1,85 @@
+@import '~styles/constants.scss';
+
+.document {
+  h1, h2, h3, h4, h5, h6 {
+    :global {
+      .anchor {
+        visibility: hidden;
+        color: $gray;
+      }
+    }
+
+    &:hover {
+      :global {
+        .anchor {
+          visibility: visible;
+        }
+      }
+    }
+  }
+
+  ul {
+    padding-left: 1.5em;
+
+    ul {
+      margin: 0;
+    }
+  }
+
+  // pre {
+  //   box-shadow: 1px 1px 1px #f5f5f5;
+  // }
+
+  blockquote {
+    font-style: italic;
+    border-left: 2px solid $lightGray;
+    padding-left: 0.8em;
+  }
+
+  table {
+    width: 100%;
+    overflow: auto;
+    display: block;
+    border-spacing: 0;
+    border-collapse: collapse;
+
+    thead, tbody {
+      width: 100%;
+    }
+
+    thead {
+      tr {
+        border-bottom: 2px solid $lightGray;
+      }
+    }
+
+    tbody {
+      tr {
+        border-bottom: 1px solid $lightGray;
+      }
+    }
+
+    tr {
+      background-color: #fff;
+
+      // &:nth-child(2n) {
+      //   background-color: #f8f8f8;
+      // }
+    }
+
+    th, td {
+      text-align: left;
+      border: 1px 0 solid $lightGray;
+      padding: 5px 20px 5px 0;
+
+      &:last-child {
+        padding-right: 0;
+        width: 100%;
+      }
+    }
+
+    th {
+      font-weight: bold;
+    }
+  }
+}
diff --git a/frontend/components/Document/components/DocumentHtml/DocumentHtml.test.js b/frontend/components/Document/components/DocumentHtml/DocumentHtml.test.js
new file mode 100644
index 00000000..5295115d
--- /dev/null
+++ b/frontend/components/Document/components/DocumentHtml/DocumentHtml.test.js
@@ -0,0 +1,20 @@
+/* eslint-disable */
+import React from 'react';
+import ReactDOM from 'react-dom';
+import DocumentHtml from './DocumentHtml';
+import { shallow } from 'enzyme';
+
+const testHtml = `
+  <h1>test document</h1>
+  <p>Hello! <a href="/internal">internal link</a></p>
+  <p>Aliens <a href="/external">external link</a></p>
+`;
+
+test('renders', () => {
+  const wrapper = shallow(
+    <DocumentHtml
+      html={ testHtml }
+    />
+  );
+  expect(wrapper.find('.document').length).toBe(1);
+});
diff --git a/frontend/components/Document/components/DocumentHtml/index.js b/frontend/components/Document/components/DocumentHtml/index.js
new file mode 100644
index 00000000..8c1e31ed
--- /dev/null
+++ b/frontend/components/Document/components/DocumentHtml/index.js
@@ -0,0 +1,2 @@
+import DocumentHtml from './DocumentHtml';
+export default DocumentHtml;
diff --git a/frontend/components/Document/index.js b/frontend/components/Document/index.js
index a477d1b8..a31bbbc2 100644
--- a/frontend/components/Document/index.js
+++ b/frontend/components/Document/index.js
@@ -1,4 +1,5 @@
-import Document, { DocumentHtml } from './Document';
+import Document from './Document';
+import DocumentHtml from './components/DocumentHtml';
 
 export default Document;
 export {
diff --git a/frontend/scenes/Flatpage/Flatpage.js b/frontend/scenes/Flatpage/Flatpage.js
index 47c16e8e..6d0afbec 100644
--- a/frontend/scenes/Flatpage/Flatpage.js
+++ b/frontend/scenes/Flatpage/Flatpage.js
@@ -10,7 +10,7 @@ import { convertToMarkdown } from 'utils/markdown';
 @observer
 class Flatpage extends React.Component {
   static propTypes = {
-    route: PropTypes.object.isRequired,
+    route: PropTypes.object,
   }
 
   render() {
diff --git a/package.json b/package.json
index 2320c064..5f0e3ad6 100644
--- a/package.json
+++ b/package.json
@@ -150,6 +150,7 @@
   },
   "devDependencies": {
     "babel-jest": "^15.0.0",
+    "enzyme": "^2.4.1",
     "fetch-test-server": "^1.1.0",
     "fsevents": "1.0.14",
     "identity-obj-proxy": "^3.0.0",
@@ -159,6 +160,7 @@
     "koa-webpack-hot-middleware": "1.0.3",
     "node-dev": "3.1.0",
     "nodemon": "1.9.1",
+    "react-addons-test-utils": "^15.3.1",
     "react-test-renderer": "^15.3.1"
   }
 }