diff --git a/core/test/regression/importer/importer_spec.js b/core/test/regression/importer/importer_spec.js
index f2a16a02d3..ca6e5af4ea 100644
--- a/core/test/regression/importer/importer_spec.js
+++ b/core/test/regression/importer/importer_spec.js
@@ -1065,10 +1065,10 @@ describe('Integration: Importer', function () {
                     posts.length.should.eql(2);
 
                     posts[0].mobiledoc.should.eql('{"version":"0.3.1","markups":[],"atoms":[],"cards":[["markdown",{"cardName":"markdown","markdown":"## Post Content"}],["image",{"src":"source2","cardWidth":"not-wide"}]],"sections":[[10,0],[10,1]]}');
-                    posts[0].html.should.eql('<h2 id="postcontent">Post Content</h2>\n<figure class="kg-card kg-image-card kg-width-not-wide"><img src="source2" class="kg-image"></figure>');
+                    posts[0].html.should.eql('<!--kg-card-begin: markdown--><h2 id="postcontent">Post Content</h2>\n<!--kg-card-end: markdown--><!--kg-card-begin: image--><figure class="kg-card kg-image-card kg-width-not-wide"><img src="source2" class="kg-image"></figure><!--kg-card-end: image-->');
 
                     posts[1].mobiledoc.should.eql('{"version":"0.3.1","markups":[],"atoms":[],"cards":[["image",{"src":"source","cardWidth":"wide"}],["markdown",{"cardName":"markdown","markdown":"# Post Content"}]],"sections":[[10,0],[10,1]]}');
-                    posts[1].html.should.eql('<figure class="kg-card kg-image-card kg-width-wide"><img src="source" class="kg-image"></figure><h1 id="postcontent">Post Content</h1>\n');
+                    posts[1].html.should.eql('<!--kg-card-begin: image--><figure class="kg-card kg-image-card kg-width-wide"><img src="source" class="kg-image"></figure><!--kg-card-end: image--><!--kg-card-begin: markdown--><h1 id="postcontent">Post Content</h1>\n<!--kg-card-end: markdown-->');
                 });
         });
     });
@@ -1382,7 +1382,7 @@ describe('1.0', function () {
                     const posts = result[0].data.map((model) => model.toJSON(options));
 
                     posts.length.should.eql(1);
-                    posts[0].html.should.eql('<h2 id="markdown">markdown</h2>\n');
+                    posts[0].html.should.eql('<!--kg-card-begin: markdown--><h2 id="markdown">markdown</h2>\n<!--kg-card-end: markdown-->');
                     posts[0].mobiledoc.should.eql('{"version":"0.3.1","markups":[],"atoms":[],"cards":[["markdown",{"cardName":"markdown","markdown":"## markdown"}]],"sections":[[10,0]]}');
                 });
         });
@@ -1407,7 +1407,7 @@ describe('1.0', function () {
                     const posts = result[0].data.map((model) => model.toJSON(options));
 
                     posts.length.should.eql(1);
-                    posts[0].html.should.eql('<h1 id="thisismypostcontent">This is my post content</h1>\n');
+                    posts[0].html.should.eql('<!--kg-card-begin: markdown--><h1 id="thisismypostcontent">This is my post content</h1>\n<!--kg-card-end: markdown-->');
                     posts[0].mobiledoc.should.eql(exportData.data.posts[0].mobiledoc);
                 });
         });
@@ -1471,10 +1471,10 @@ describe('1.0', function () {
                     posts.length.should.eql(2);
 
                     posts[0].mobiledoc.should.eql('{"version":"0.3.1","markups":[],"atoms":[],"cards":[["markdown",{"cardName":"markdown","markdown":"## Post Content"}],["image",{"src":"source2","cardWidth":"not-wide"}]],"sections":[[10,0],[10,1]]}');
-                    posts[0].html.should.eql('<h2 id="postcontent">Post Content</h2>\n<figure class="kg-card kg-image-card kg-width-not-wide"><img src="source2" class="kg-image"></figure>');
+                    posts[0].html.should.eql('<!--kg-card-begin: markdown--><h2 id="postcontent">Post Content</h2>\n<!--kg-card-end: markdown--><!--kg-card-begin: image--><figure class="kg-card kg-image-card kg-width-not-wide"><img src="source2" class="kg-image"></figure><!--kg-card-end: image-->');
 
                     posts[1].mobiledoc.should.eql('{"version":"0.3.1","markups":[],"atoms":[],"cards":[["image",{"src":"source","cardWidth":"wide"}],["markdown",{"cardName":"markdown","markdown":"# Post Content"}]],"sections":[[10,0],[10,1]]}');
-                    posts[1].html.should.eql('<figure class="kg-card kg-image-card kg-width-wide"><img src="source" class="kg-image"></figure><h1 id="postcontent">Post Content</h1>\n');
+                    posts[1].html.should.eql('<!--kg-card-begin: image--><figure class="kg-card kg-image-card kg-width-wide"><img src="source" class="kg-image"></figure><!--kg-card-end: image--><!--kg-card-begin: markdown--><h1 id="postcontent">Post Content</h1>\n<!--kg-card-end: markdown-->');
                 });
         });
     });
diff --git a/core/test/utils/fixtures/data-generator.js b/core/test/utils/fixtures/data-generator.js
index d3765b6bbb..be6a2ab57c 100644
--- a/core/test/utils/fixtures/data-generator.js
+++ b/core/test/utils/fixtures/data-generator.js
@@ -46,7 +46,7 @@ DataGenerator.Content = {
             title: 'Short and Sweet',
             slug: 'short-and-sweet',
             mobiledoc: DataGenerator.markdownToMobiledoc('## testing\n\nmctesters\n\n- test\n- line\n- items'),
-            html: '<h2 id=\"testing\">testing</h2>\n<p>mctesters</p>\n<ul>\n<li>test</li>\n<li>line</li>\n<li>items</li>\n</ul>\n',
+            html: '<!--kg-card-begin: markdown--><h2 id=\"testing\">testing</h2>\n<p>mctesters</p>\n<ul>\n<li>test</li>\n<li>line</li>\n<li>items</li>\n</ul>\n<!--kg-card-end: markdown-->',
             plaintext: 'testing\nmctesters\n\n * test\n * line\n * items',
             feature_image: 'http://placekitten.com/500/200',
             meta_description: 'test stuff',