diff --git a/docs/src/demos/Extensions/Blockquote/index.spec.js b/docs/src/demos/Extensions/Blockquote/index.spec.js
index 76d7cd68..b9c93d8b 100644
--- a/docs/src/demos/Extensions/Blockquote/index.spec.js
+++ b/docs/src/demos/Extensions/Blockquote/index.spec.js
@@ -10,6 +10,20 @@ context('/api/extensions/blockquote', () => {
     })
   })
 
+  it('should parse blockquote tags correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<blockquote><p>Example Text</p></blockquote>')
+      expect(editor.html()).to.eq('<blockquote><p>Example Text</p></blockquote>')
+    })
+  })
+
+  it('should parse blockquote tags without paragraphs correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<blockquote>Example Text</blockquote>')
+      expect(editor.html()).to.eq('<blockquote><p>Example Text</p></blockquote>')
+    })
+  })
+
   it('the button should make the selected line a blockquote', () => {
     cy.get('.ProseMirror blockquote')
       .should('not.exist')
diff --git a/docs/src/demos/Extensions/Bold/index.spec.js b/docs/src/demos/Extensions/Bold/index.spec.js
index 7e22cda1..39ae2df1 100644
--- a/docs/src/demos/Extensions/Bold/index.spec.js
+++ b/docs/src/demos/Extensions/Bold/index.spec.js
@@ -10,21 +10,21 @@ context('/api/extensions/bold', () => {
     })
   })
 
-  it('b tags should be transformed to strong tags', () => {
+  it('should transform b tags to strong tags', () => {
     cy.get('.ProseMirror').then(([{ editor }]) => {
       editor.setContent('<p><b>Example Text</b></p>')
       expect(editor.html()).to.eq('<p><strong>Example Text</strong></p>')
     })
   })
 
-  it('b tags with normal font weight inline style should be omitted', () => {
+  it('sould omit b tags with normal font weight inline style', () => {
     cy.get('.ProseMirror').then(([{ editor }]) => {
       editor.setContent('<p><b style="font-weight: normal">Example Text</b></p>')
       expect(editor.html()).to.eq('<p>Example Text</p>')
     })
   })
 
-  it('generic tags with bold inline style should be transformed to strong tags', () => {
+  it('should transform any tag with bold inline style to strong tags', () => {
     cy.get('.ProseMirror').then(([{ editor }]) => {
       editor.setContent('<p><span style="font-weight: bold">Example Text</span></p>')
       expect(editor.html()).to.eq('<p><strong>Example Text</strong></p>')
diff --git a/docs/src/demos/Extensions/BulletList/index.spec.js b/docs/src/demos/Extensions/BulletList/index.spec.js
index 2636ba56..80824278 100644
--- a/docs/src/demos/Extensions/BulletList/index.spec.js
+++ b/docs/src/demos/Extensions/BulletList/index.spec.js
@@ -10,6 +10,20 @@ context('/api/extensions/bullet-list', () => {
     })
   })
 
+  it('should parse unordered lists correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<ul><li><p>Example Text</p></li></ul>')
+      expect(editor.html()).to.eq('<ul><li><p>Example Text</p></li></ul>')
+    })
+  })
+
+  it('should parse unordered lists without paragraphs correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<ul><li>Example Text</li></ul>')
+      expect(editor.html()).to.eq('<ul><li><p>Example Text</p></li></ul>')
+    })
+  })
+
   it('the button should make the selected line a bullet list item', () => {
     cy.get('.ProseMirror ul')
       .should('not.exist')
diff --git a/docs/src/demos/Extensions/Code/index.spec.js b/docs/src/demos/Extensions/Code/index.spec.js
index 2b48929d..7ecd0cc7 100644
--- a/docs/src/demos/Extensions/Code/index.spec.js
+++ b/docs/src/demos/Extensions/Code/index.spec.js
@@ -10,6 +10,16 @@ context('/api/extensions/code', () => {
     })
   })
 
+  it('should parse code tags correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><code>Example Text</code></p>')
+      expect(editor.html()).to.eq('<p><code>Example Text</code></p>')
+
+      editor.setContent('<code>Example Text</code>')
+      expect(editor.html()).to.eq('<p><code>Example Text</code></p>')
+    })
+  })
+
   it('should mark the selected text as inline code', () => {
     cy.get('.demo__preview button:first')
       .click()
@@ -32,4 +42,11 @@ context('/api/extensions/code', () => {
     cy.get('.ProseMirror code')
       .should('not.exist')
   })
+
+  it('should make inline code from the markdown shortcut', () => {
+    cy.get('.ProseMirror')
+      .type('`Example`')
+      .find('code')
+      .should('contain', 'Example')
+  })
 })
diff --git a/docs/src/demos/Extensions/CodeBlock/index.spec.js b/docs/src/demos/Extensions/CodeBlock/index.spec.js
index 7da58542..7ad110d5 100644
--- a/docs/src/demos/Extensions/CodeBlock/index.spec.js
+++ b/docs/src/demos/Extensions/CodeBlock/index.spec.js
@@ -10,6 +10,20 @@ context('/api/extensions/code-block', () => {
     })
   })
 
+  it('should parse code blocks correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<pre><code>Example Text</code></pre>')
+      expect(editor.html()).to.eq('<pre><code>Example Text</code></pre>')
+    })
+  })
+
+  it('should parse code blocks with language correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<pre><code class="language-css">Example Text</code></pre>')
+      expect(editor.html()).to.eq('<pre><code class="language-css">Example Text</code></pre>')
+    })
+  })
+
   it('the button should make the selected line a code block', () => {
     cy.get('.demo__preview button:first')
       .click()
diff --git a/docs/src/demos/Extensions/Document/index.spec.js b/docs/src/demos/Extensions/Document/index.spec.js
index e5480a1b..66a973e6 100644
--- a/docs/src/demos/Extensions/Document/index.spec.js
+++ b/docs/src/demos/Extensions/Document/index.spec.js
@@ -2,4 +2,25 @@ context('/api/extensions/document', () => {
   before(() => {
     cy.visit('/api/extensions/document')
   })
+
+  beforeEach(() => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p></p>')
+    })
+  })
+
+  it('should return the document in as json', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      const json = editor.json()
+
+      expect(json).to.deep.equal({
+        type: 'document',
+        content: [
+          {
+            type: 'paragraph',
+          },
+        ],
+      })
+    })
+  })
 })
diff --git a/docs/src/demos/Extensions/HardBreak/index.spec.js b/docs/src/demos/Extensions/HardBreak/index.spec.js
index 9cb12634..0e5bbdc0 100644
--- a/docs/src/demos/Extensions/HardBreak/index.spec.js
+++ b/docs/src/demos/Extensions/HardBreak/index.spec.js
@@ -9,6 +9,20 @@ context('/api/extensions/hard-break', () => {
     })
   })
 
+  it('should parse hard breaks correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example<br>Text</p>')
+      expect(editor.html()).to.eq('<p>Example<br>Text</p>')
+    })
+  })
+
+  it('should parse hard breaks with self-closing tag correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example<br />Text</p>')
+      expect(editor.html()).to.eq('<p>Example<br>Text</p>')
+    })
+  })
+
   it('the button should add a line break', () => {
     cy.get('.ProseMirror br')
       .should('not.exist')
diff --git a/docs/src/demos/Extensions/Heading/index.spec.js b/docs/src/demos/Extensions/Heading/index.spec.js
index 5f9c9f9c..edb14b07 100644
--- a/docs/src/demos/Extensions/Heading/index.spec.js
+++ b/docs/src/demos/Extensions/Heading/index.spec.js
@@ -10,6 +10,31 @@ context('/api/extensions/heading', () => {
     })
   })
 
+  const headings = [
+    '<h1>Example Text</h1>',
+    '<h2>Example Text</h2>',
+    '<h3>Example Text</h3>',
+    '<h4>Example Text</h4>',
+    '<h5>Example Text</h5>',
+    '<h6>Example Text</h6>',
+  ]
+
+  headings.forEach(html => {
+    it(`should parse headings correctly (${html})`, () => {
+      cy.get('.ProseMirror').then(([{ editor }]) => {
+        editor.setContent(html)
+        expect(editor.html()).to.eq(html)
+      })
+    })
+  })
+
+  it('should omit invalid headings', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<h7>Example Text</h7>')
+      expect(editor.html()).to.eq('<p>Example Text</p>')
+    })
+  })
+
   it('the button should make the selected line a h1', () => {
     cy.get('.ProseMirror h1')
       .should('not.exist')
diff --git a/docs/src/demos/Extensions/HorizontalRule/index.spec.js b/docs/src/demos/Extensions/HorizontalRule/index.spec.js
index 0f700668..8273c7ef 100644
--- a/docs/src/demos/Extensions/HorizontalRule/index.spec.js
+++ b/docs/src/demos/Extensions/HorizontalRule/index.spec.js
@@ -9,6 +9,20 @@ context('/api/extensions/horizontal-rule', () => {
     })
   })
 
+  it('should parse horizontal rules correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example Text</p><hr>')
+      expect(editor.html()).to.eq('<p>Example Text</p><hr>')
+    })
+  })
+
+  it('should parse horizontal rules with self-closing tag correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example Text</p><hr />')
+      expect(editor.html()).to.eq('<p>Example Text</p><hr>')
+    })
+  })
+
   it('the button should add a horizontal rule', () => {
     cy.get('.ProseMirror hr')
       .should('not.exist')
diff --git a/docs/src/demos/Extensions/Link/index.spec.js b/docs/src/demos/Extensions/Link/index.spec.js
index 29db24a4..f9102b53 100644
--- a/docs/src/demos/Extensions/Link/index.spec.js
+++ b/docs/src/demos/Extensions/Link/index.spec.js
@@ -10,6 +10,27 @@ context('/api/extensions/link', () => {
     })
   })
 
+  it('should parse a tags correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><a href="#">Example Text</a></p>')
+      expect(editor.html()).to.eq('<p><a href="#" target="_blank" rel="noopener noreferrer nofollow">Example Text</a></p>')
+    })
+  })
+
+  it('should parse a tags with target attribute correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><a href="#" target="_self">Example Text</a></p>')
+      expect(editor.html()).to.eq('<p><a href="#" target="_self" rel="noopener noreferrer nofollow">Example Text</a></p>')
+    })
+  })
+
+  it('should parse a tags with rel attribute correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><a href="#" rel="follow">Example Text</a></p>')
+      expect(editor.html()).to.eq('<p><a href="#" target="_blank" rel="noopener noreferrer nofollow">Example Text</a></p>')
+    })
+  })
+
   it('the button should add a link to the selected text', () => {
     cy.window().then(win => {
       cy.stub(win, 'prompt').returns('https://tiptap.dev')
diff --git a/docs/src/demos/Extensions/OrderedList/index.spec.js b/docs/src/demos/Extensions/OrderedList/index.spec.js
index a6d58920..d1cbafb2 100644
--- a/docs/src/demos/Extensions/OrderedList/index.spec.js
+++ b/docs/src/demos/Extensions/OrderedList/index.spec.js
@@ -10,6 +10,20 @@ context('/api/extensions/ordered-list', () => {
     })
   })
 
+  it('should parse ordered lists correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<ol><li><p>Example Text</p></li></ol>')
+      expect(editor.html()).to.eq('<ol><li><p>Example Text</p></li></ol>')
+    })
+  })
+
+  it('should parse ordered lists without paragraphs correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<ol><li>Example Text</li></ol>')
+      expect(editor.html()).to.eq('<ol><li><p>Example Text</p></li></ol>')
+    })
+  })
+
   it('the button should make the selected line a ordered list item', () => {
     cy.get('.ProseMirror ol')
       .should('not.exist')
diff --git a/docs/src/demos/Extensions/Paragraph/index.spec.js b/docs/src/demos/Extensions/Paragraph/index.spec.js
index 734f9d31..4820826b 100644
--- a/docs/src/demos/Extensions/Paragraph/index.spec.js
+++ b/docs/src/demos/Extensions/Paragraph/index.spec.js
@@ -9,6 +9,19 @@ context('/api/extensions/paragraph', () => {
     })
   })
 
+  it('should parse paragraphs correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example Text</p>')
+      expect(editor.html()).to.eq('<p>Example Text</p>')
+
+      editor.setContent('<p><x-unknown>Example Text</x-unknown></p>')
+      expect(editor.html()).to.eq('<p>Example Text</p>')
+
+      editor.setContent('<p style="display: block;">Example Text</p>')
+      expect(editor.html()).to.eq('<p>Example Text</p>')
+    })
+  })
+
   it('text should be wrapped in a paragraph by default', () => {
     cy.get('.ProseMirror')
       .type('Example Text')
diff --git a/docs/src/demos/Extensions/Strike/index.spec.js b/docs/src/demos/Extensions/Strike/index.spec.js
index 54db052b..dd7140dd 100644
--- a/docs/src/demos/Extensions/Strike/index.spec.js
+++ b/docs/src/demos/Extensions/Strike/index.spec.js
@@ -10,6 +10,34 @@ context('/api/extensions/strike', () => {
     })
   })
 
+  it('should parse s tags correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><s>Example Text</s></p>')
+      expect(editor.html()).to.eq('<p><s>Example Text</s></p>')
+    })
+  })
+
+  it('should transform del tags to s tags', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><del>Example Text</del></p>')
+      expect(editor.html()).to.eq('<p><s>Example Text</s></p>')
+    })
+  })
+
+  it('should transform strike tags to s tags', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><strike>Example Text</strike></p>')
+      expect(editor.html()).to.eq('<p><s>Example Text</s></p>')
+    })
+  })
+
+  it('should transform any tag with text decoration line through to s tags', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><span style="text-decoration: line-through">Example Text</span></p>')
+      expect(editor.html()).to.eq('<p><s>Example Text</s></p>')
+    })
+  })
+
   it('the button should strike the selected text', () => {
     cy.get('.demo__preview button:first')
       .click()
diff --git a/docs/src/demos/Extensions/Underline/index.spec.js b/docs/src/demos/Extensions/Underline/index.spec.js
index 19a28377..bf6e1572 100644
--- a/docs/src/demos/Extensions/Underline/index.spec.js
+++ b/docs/src/demos/Extensions/Underline/index.spec.js
@@ -10,6 +10,20 @@ context('/api/extensions/underline', () => {
     })
   })
 
+  it('should parse u tags correctly', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><u>Example Text</u></p>')
+      expect(editor.html()).to.eq('<p><u>Example Text</u></p>')
+    })
+  })
+
+  it('should transform any tag with text decoration underline to u tags', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p><span style="text-decoration: underline">Example Text</span></p>')
+      expect(editor.html()).to.eq('<p><u>Example Text</u></p>')
+    })
+  })
+
   it('the button should underline the selected text', () => {
     cy.get('.demo__preview button:first')
       .click()