diff --git a/blocks/test/fixtures/core-button-center.html b/blocks/test/fixtures/core-button-center.html
index e19e0ed3fc4d6e..b80f97864c2935 100644
--- a/blocks/test/fixtures/core-button-center.html
+++ b/blocks/test/fixtures/core-button-center.html
@@ -1,3 +1,3 @@
 <!-- wp:core/button align="center" -->
-<div class="aligncenter"><a href="https://github.com/WordPress/gutenberg"><span>Help build Gutenberg</span></a></div>
+<div class="aligncenter"><a href="https://github.com/WordPress/gutenberg">Help build Gutenberg</a></div>
 <!-- /wp:core/button -->
diff --git a/blocks/test/fixtures/core-freeform.json b/blocks/test/fixtures/core-freeform.json
index 09a99fbee8aa5d..c12160e9584178 100644
--- a/blocks/test/fixtures/core-freeform.json
+++ b/blocks/test/fixtures/core-freeform.json
@@ -4,13 +4,13 @@
         "name": "core/freeform",
         "attributes": {
             "content": [
-                "Testing freeform block with some",
+                "Testing freeform block with some\n",
                 {
                     "attributes": {
                         "className": "wp-some-class"
                     },
                     "children": [
-                        "HTML ",
+                        "\n\tHTML ",
                         {
                             "attributes": {
                                 "style": {
@@ -19,7 +19,8 @@
                             },
                             "children": "content",
                             "type": "span"
-                        }
+                        },
+                        "\n"
                     ],
                     "type": "div"
                 }
diff --git a/blocks/test/fixtures/core-freeform.serialized.html b/blocks/test/fixtures/core-freeform.serialized.html
index 4ce56fd27af8e9..d30114895dd4c6 100644
--- a/blocks/test/fixtures/core-freeform.serialized.html
+++ b/blocks/test/fixtures/core-freeform.serialized.html
@@ -1,5 +1,7 @@
 <!-- wp:core/freeform -->
 Testing freeform block with some
-<div class="wp-some-class">HTML <span style="color:red;">content</span></div>
+<div class="wp-some-class">
+    HTML <span style="color:red;">content</span>
+</div>
 <!-- /wp:core/freeform -->
 
diff --git a/blocks/test/fixtures/core-text-multi-paragraph.json b/blocks/test/fixtures/core-text-multi-paragraph.json
index 4760696210f6b2..fd29811801eff6 100644
--- a/blocks/test/fixtures/core-text-multi-paragraph.json
+++ b/blocks/test/fixtures/core-text-multi-paragraph.json
@@ -15,6 +15,7 @@
                         "—somewhat similar to LEGO bricks—that you can move around and interact with. Move your cursor around and you'll notice the different blocks light up with outlines and arrows. Press the arrows to reposition blocks quickly, without fearing about losing things in the process of copying and pasting."
                     ]
                 },
+                "\n",
                 {
                     "type": "p",
                     "children": [
diff --git a/blocks/test/full-content.js b/blocks/test/full-content.js
index 4bdf65b03bac7f..26ab2a09a60b4c 100644
--- a/blocks/test/full-content.js
+++ b/blocks/test/full-content.js
@@ -10,10 +10,7 @@ import { format } from 'util';
 /**
  * Internal dependencies
  */
-import {
-	// parseWithGrammar,
-	parseWithTinyMCE,
-} from '../api/parser';
+import parse from '../api/parser';
 import serialize from '../api/serializer';
 import { getBlockTypes } from '../api/registration';
 
@@ -94,7 +91,7 @@ describe( 'full post content fixture', () => {
 		it( f, () => {
 			const content = readFixtureFile( f + '.html' );
 
-			const blocksActual = parseWithTinyMCE( content );
+			const blocksActual = parse( content );
 			const blocksActualNormalized = normalizeParsedBlocks( blocksActual );
 			let blocksExpectedString = readFixtureFile( f + '.json' );