From c255558b2d4f2be6453c67df81bb702a1a586909 Mon Sep 17 00:00:00 2001 From: Nick Perez Date: Fri, 15 May 2026 10:06:22 +0200 Subject: [PATCH] fix: backslash newlines when copying from a code block (#2709) * fix: backslash newlines when copying from a code block When copying inline content from inside a code block, the text/plain clipboard payload had a backslash before every newline (markdown's hard-break syntax) and the text/html had `
` separators inside the code instead of literal newlines. Two changes fix this: - copyExtension routes selections inside a code block through the block-export path so the code block's own toExternalHTML produces the proper `
` wrapper.
- serializeInlineContentExternalHTML now plumbs blockType through to
  inlineContentToNodes (mirroring the internal HTML serializer) so
  `\n` in code-block content stays as literal text instead of being
  split into hardBreak nodes that render as `
`.

Co-Authored-By: Claude Opus 4.7 (1M context) 

* fix: drop `as const` from PRETTIFY_OPTIONS to satisfy htmlfy types

`as const` typed `ignore` as a readonly tuple, which doesn't match
`UserConfig.ignore: string[]`, breaking CI typecheck.

Co-Authored-By: Claude Opus 4.7 (1M context) 

* test: integrate code-block copy regression into existing copy test suite

Address PR review:
- Drop standalone codeBlockMarkdown.test.ts; add `codeBlockFullContent` and
  `codeBlockPartialSelection` cases to copyTestInstances.ts and snapshot
  text/plain markdown for all copy test instances via a new
  `Copy tests (Markdown)` describe block (mirrors the export test pattern).
- Trim verbose comments in copyExtension and serializeBlocksExternalHTML.
- copyPasteEquality executor now passes the actual markdown payload as the
  text/plain MIME instead of a literal "text" placeholder, so paste handlers
  that prefer text/plain (e.g. inside code blocks) round-trip correctly.
- Update mixedInParagraph snapshots: prettify's `ignore: ["code"]` preserves
  trailing whitespace inside `` spans, which is the actual HTML output.

---------

Co-authored-by: Claude Opus 4.7 (1M context) 
---
 .../clipboard/toClipboard/copyExtension.ts    | 13 +++-
 .../html/util/serializeBlocksExternalHTML.ts  | 16 +++--
 .../text/html/codeBlockFullContent.html       |  3 +
 .../text/html/codeBlockPartialSelection.html  |  3 +
 .../__snapshots__/text/plain/basicBlocks.md   | 24 +++++++
 .../text/plain/basicBlocksWithProps.md        | 24 +++++++
 .../__snapshots__/text/plain/childToParent.md |  3 +
 .../text/plain/childrenToNextParent.md        |  7 +++
 .../plain/childrenToNextParentsChildren.md    | 13 ++++
 .../text/plain/codeBlockFullContent.md        |  2 +
 .../text/plain/codeBlockPartialSelection.md   |  2 +
 .../copy/__snapshots__/text/plain/image.md    |  1 +
 .../text/plain/mentionWithBackgroundColor.md  |  5 ++
 .../text/plain/multipleChildren.md            |  5 ++
 .../text/plain/multipleStyledText.md          |  1 +
 .../__snapshots__/text/plain/nestedImage.md   |  5 ++
 .../text/plain/partialChildToParent.md        |  3 +
 .../__snapshots__/text/plain/styledText.md    |  1 +
 .../__snapshots__/text/plain/tableAllCells.md |  4 ++
 .../__snapshots__/text/plain/tableCell.md     |  3 +
 .../__snapshots__/text/plain/tableCellText.md |  1 +
 .../copy/__snapshots__/text/plain/tableCol.md |  4 ++
 .../copy/__snapshots__/text/plain/tableRow.md |  3 +
 .../__snapshots__/text/plain/unstyledText.md  |  1 +
 .../core/clipboard/copy/copyTestInstances.ts  | 62 ++++++++++++++++++-
 .../unit/core/clipboard/copy/runTests.test.ts | 15 ++++-
 .../codeBlock/contains-newlines.html          |  4 +-
 .../blocknoteHTML/codeBlock/empty.html        |  4 +-
 .../blocknoteHTML/style/mixedInParagraph.html |  2 +-
 .../html/codeBlock/contains-newlines.html     |  9 +--
 .../html/style/mixedInParagraph.html          |  2 +-
 .../copyPasteEqualityTestExecutors.ts         |  4 +-
 .../export/exportTestExecutors.ts             | 12 ++--
 33 files changed, 234 insertions(+), 27 deletions(-)
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/html/codeBlockFullContent.html
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/html/codeBlockPartialSelection.html
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/basicBlocks.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/basicBlocksWithProps.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childToParent.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childrenToNextParent.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childrenToNextParentsChildren.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/codeBlockFullContent.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/codeBlockPartialSelection.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/image.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/mentionWithBackgroundColor.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/multipleChildren.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/multipleStyledText.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/nestedImage.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/partialChildToParent.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/styledText.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableAllCells.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCell.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCellText.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCol.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableRow.md
 create mode 100644 tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/unstyledText.md

diff --git a/packages/core/src/api/clipboard/toClipboard/copyExtension.ts b/packages/core/src/api/clipboard/toClipboard/copyExtension.ts
index 7812ae3c2e..e150af1309 100644
--- a/packages/core/src/api/clipboard/toClipboard/copyExtension.ts
+++ b/packages/core/src/api/clipboard/toClipboard/copyExtension.ts
@@ -140,7 +140,18 @@ export function selectedFragmentToHTML<
     editor,
   );
 
-  const markdown = cleanHTMLToMarkdown(externalHTML);
+  // Code blocks are treated differently for copying: text/plain is the raw
+  // selected text instead of markdown.
+  const { $from, $to } = view.state.selection;
+  const parentBlockType = $from.parent.type.name;
+  const parentBlockSpec = editor.blockImplementations[parentBlockType as any];
+  const isPurelyInsideCodeBlock =
+    $from.sameParent($to) &&
+    parentBlockSpec?.implementation.meta?.code === true;
+
+  const markdown = isPurelyInsideCodeBlock
+    ? view.state.doc.textBetween($from.pos, $to.pos)
+    : cleanHTMLToMarkdown(externalHTML);
 
   return { clipboardHTML, externalHTML, markdown };
 }
diff --git a/packages/core/src/api/exporters/html/util/serializeBlocksExternalHTML.ts b/packages/core/src/api/exporters/html/util/serializeBlocksExternalHTML.ts
index 894c0f1c1b..72569ffced 100644
--- a/packages/core/src/api/exporters/html/util/serializeBlocksExternalHTML.ts
+++ b/packages/core/src/api/exporters/html/util/serializeBlocksExternalHTML.ts
@@ -37,7 +37,7 @@ export function serializeInlineContentExternalHTML<
   editor: BlockNoteEditor,
   blockContent: PartialBlock["content"],
   serializer: DOMSerializer,
-  options?: { document?: Document },
+  options?: { document?: Document; blockType?: string },
 ) {
   let nodes: Node[];
 
@@ -45,9 +45,17 @@ export function serializeInlineContentExternalHTML<
   if (!blockContent) {
     throw new Error("blockContent is required");
   } else if (typeof blockContent === "string") {
-    nodes = inlineContentToNodes([blockContent], editor.pmSchema);
+    nodes = inlineContentToNodes(
+      [blockContent],
+      editor.pmSchema,
+      options?.blockType,
+    );
   } else if (Array.isArray(blockContent)) {
-    nodes = inlineContentToNodes(blockContent, editor.pmSchema);
+    nodes = inlineContentToNodes(
+      blockContent,
+      editor.pmSchema,
+      options?.blockType,
+    );
   } else if (blockContent.type === "tableContent") {
     nodes = tableContentToNodes(blockContent, editor.pmSchema);
   } else {
@@ -262,7 +270,7 @@ function serializeBlock<
       editor,
       block.content as any, // TODO
       serializer,
-      options,
+      { ...options, blockType: block.type },
     );
 
     ret.contentDOM.appendChild(ic);
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/html/codeBlockFullContent.html b/tests/src/unit/core/clipboard/copy/__snapshots__/text/html/codeBlockFullContent.html
new file mode 100644
index 0000000000..2d3784f358
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/html/codeBlockFullContent.html
@@ -0,0 +1,3 @@
+const a = 1;
+

+const b = 2;
\ No newline at end of file
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/html/codeBlockPartialSelection.html b/tests/src/unit/core/clipboard/copy/__snapshots__/text/html/codeBlockPartialSelection.html
new file mode 100644
index 0000000000..8ff30e3da7
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/html/codeBlockPartialSelection.html
@@ -0,0 +1,3 @@
+onst a = 1;
+

+const b = 2
\ No newline at end of file
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/basicBlocks.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/basicBlocks.md
new file mode 100644
index 0000000000..59e94f2356
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/basicBlocks.md
@@ -0,0 +1,24 @@
+Paragraph 1
+
+# Heading 1
+
+1. Numbered List Item 1
+
+* Bullet List Item 1
+* [ ] Check List Item 1
+* Toggle List Item 1
+
+```text
+console.log("Hello World");
+```
+
+|              |              |
+| ------------ | ------------ |
+| Table Cell 1 | Table Cell 2 |
+| Table Cell 3 | Table Cell 4 |
+
+
+
+***
+
+Paragraph 2
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/basicBlocksWithProps.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/basicBlocksWithProps.md
new file mode 100644
index 0000000000..906cfc560e
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/basicBlocksWithProps.md
@@ -0,0 +1,24 @@
+Paragraph 1
+
+## Heading 1
+
+2. Numbered List Item 1
+
+* Bullet List Item 1
+* [x] Check List Item 1
+* Toggle List Item 1
+
+```typescript
+console.log("Hello World");
+```
+
+|              |              |
+| ------------ | ------------ |
+| Table Cell 1 | Table Cell 2 |
+| Table Cell 3 | Table Cell 4 |
+
+
1280px-Placeholder_view_vector.svg.png
Placeholder

+
+***
+
+Paragraph 2
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childToParent.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childToParent.md
new file mode 100644
index 0000000000..c843d3b34c
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childToParent.md
@@ -0,0 +1,3 @@
+Paragraph 1
+
+Nested Paragraph 1
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childrenToNextParent.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childrenToNextParent.md
new file mode 100644
index 0000000000..a1c8bcb403
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childrenToNextParent.md
@@ -0,0 +1,7 @@
+Nested Paragraph 1
+
+Nested Paragraph 2
+
+Nested Paragraph 3
+
+Paragraph 2
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childrenToNextParentsChildren.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childrenToNextParentsChildren.md
new file mode 100644
index 0000000000..3350bf4006
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/childrenToNextParentsChildren.md
@@ -0,0 +1,13 @@
+Nested Paragraph 1
+
+Nested Paragraph 2
+
+Nested Paragraph 3
+
+Paragraph 2
+
+Nested Paragraph 4
+
+Nested Paragraph 5
+
+Nested Paragraph 6
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/codeBlockFullContent.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/codeBlockFullContent.md
new file mode 100644
index 0000000000..781d5f3999
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/codeBlockFullContent.md
@@ -0,0 +1,2 @@
+const a = 1;
+const b = 2;
\ No newline at end of file
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/codeBlockPartialSelection.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/codeBlockPartialSelection.md
new file mode 100644
index 0000000000..b911c40cba
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/codeBlockPartialSelection.md
@@ -0,0 +1,2 @@
+onst a = 1;
+const b = 2
\ No newline at end of file
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/image.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/image.md
new file mode 100644
index 0000000000..02f1b078b9
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/image.md
@@ -0,0 +1 @@
+![](https://ralfvanveen.com/wp-content/uploads/2021/06/Placeholder-_-Glossary.svg)
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/mentionWithBackgroundColor.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/mentionWithBackgroundColor.md
new file mode 100644
index 0000000000..430c08db48
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/mentionWithBackgroundColor.md
@@ -0,0 +1,5 @@
+Paragraph 1
+
+@User
+
+Paragraph 2
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/multipleChildren.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/multipleChildren.md
new file mode 100644
index 0000000000..cfb1e11c1c
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/multipleChildren.md
@@ -0,0 +1,5 @@
+Nested Paragraph 1
+
+Nested Paragraph 2
+
+Nested Paragraph 3
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/multipleStyledText.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/multipleStyledText.md
new file mode 100644
index 0000000000..2a9e4dfd67
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/multipleStyledText.md
@@ -0,0 +1 @@
+Unstyled TextItalic TextBold Text
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/nestedImage.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/nestedImage.md
new file mode 100644
index 0000000000..8ac9591d8a
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/nestedImage.md
@@ -0,0 +1,5 @@
+Paragraph 1
+
+![](https://ralfvanveen.com/wp-content/uploads/2021/06/Placeholder-_-Glossary.svg)
+
+Nested Paragraph 1
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/partialChildToParent.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/partialChildToParent.md
new file mode 100644
index 0000000000..d8e105dbc6
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/partialChildToParent.md
@@ -0,0 +1,3 @@
+aragraph 1
+
+N
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/styledText.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/styledText.md
new file mode 100644
index 0000000000..e0c33d6a00
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/styledText.md
@@ -0,0 +1 @@
+Italic Text
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableAllCells.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableAllCells.md
new file mode 100644
index 0000000000..4cce45d6ef
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableAllCells.md
@@ -0,0 +1,4 @@
+|              |              |
+| ------------ | ------------ |
+| Table Cell 1 | Table Cell 2 |
+| Table Cell 3 | Table Cell 4 |
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCell.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCell.md
new file mode 100644
index 0000000000..e4a55e08be
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCell.md
@@ -0,0 +1,3 @@
+|              |
+| ------------ |
+| Table Cell 1 |
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCellText.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCellText.md
new file mode 100644
index 0000000000..bd5288ec6d
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCellText.md
@@ -0,0 +1 @@
+Table Cell 1
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCol.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCol.md
new file mode 100644
index 0000000000..54fa7b06a2
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableCol.md
@@ -0,0 +1,4 @@
+|              |
+| ------------ |
+| Table Cell 1 |
+| Table Cell 3 |
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableRow.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableRow.md
new file mode 100644
index 0000000000..4489a26e88
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/tableRow.md
@@ -0,0 +1,3 @@
+|              |              |
+| ------------ | ------------ |
+| Table Cell 1 | Table Cell 2 |
diff --git a/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/unstyledText.md b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/unstyledText.md
new file mode 100644
index 0000000000..44a4f52867
--- /dev/null
+++ b/tests/src/unit/core/clipboard/copy/__snapshots__/text/plain/unstyledText.md
@@ -0,0 +1 @@
+Unstyled Text
diff --git a/tests/src/unit/core/clipboard/copy/copyTestInstances.ts b/tests/src/unit/core/clipboard/copy/copyTestInstances.ts
index 17fa89e08d..4bd34489c0 100644
--- a/tests/src/unit/core/clipboard/copy/copyTestInstances.ts
+++ b/tests/src/unit/core/clipboard/copy/copyTestInstances.ts
@@ -7,7 +7,10 @@ import {
   TestStyleSchema,
 } from "../../testSchema.js";
 import { CopyTestCase } from "../../../shared/clipboard/copy/copyTestCase.js";
-import { testCopyHTML } from "../../../shared/clipboard/copy/copyTestExecutors.js";
+import {
+  testCopyHTML,
+  testCopyMarkdown,
+} from "../../../shared/clipboard/copy/copyTestExecutors.js";
 import {
   getPosOfTableCellNode,
   getPosOfTextNode,
@@ -676,4 +679,61 @@ export const copyTestInstancesHTML: TestInstance<
     },
     executeTest: testCopyHTML,
   },
+  {
+    testCase: {
+      name: "codeBlockFullContent",
+      document: [
+        {
+          type: "codeBlock",
+          props: { language: "javascript" },
+          content: "const a = 1;\nconst b = 2;",
+        },
+      ],
+      getCopySelection: (doc) => {
+        const text = "const a = 1;\nconst b = 2;";
+        const startPos = getPosOfTextNode(doc, text);
+        const endPos = getPosOfTextNode(doc, text, true);
+
+        return TextSelection.create(doc, startPos, endPos);
+      },
+    },
+    executeTest: testCopyHTML,
+  },
+  {
+    testCase: {
+      name: "codeBlockPartialSelection",
+      document: [
+        {
+          type: "codeBlock",
+          props: { language: "javascript" },
+          content: "const a = 1;\nconst b = 2;",
+        },
+      ],
+      getCopySelection: (doc) => {
+        const text = "const a = 1;\nconst b = 2;";
+        const startPos = getPosOfTextNode(doc, text);
+        // Select `onst a = 1;\nconst b = 2` — partial, spans a newline.
+        return TextSelection.create(
+          doc,
+          startPos + "c".length,
+          startPos + text.length - ";".length,
+        );
+      },
+    },
+    executeTest: testCopyHTML,
+  },
 ];
+
+// text/plain payloads — exercises the same selections as above but snapshots
+// the markdown output. Code-block selections should emit raw text (no markdown
+// fences or `\` line-break escaping) so the clipboard round-trips back into a
+// code block without leaving leftover syntax.
+export const copyTestInstancesMarkdown: TestInstance<
+  CopyTestCase,
+  TestBlockSchema,
+  TestInlineContentSchema,
+  TestStyleSchema
+>[] = copyTestInstancesHTML.map(({ testCase }) => ({
+  testCase,
+  executeTest: testCopyMarkdown,
+}));
diff --git a/tests/src/unit/core/clipboard/copy/runTests.test.ts b/tests/src/unit/core/clipboard/copy/runTests.test.ts
index f7f2474d03..eb2770b4ab 100644
--- a/tests/src/unit/core/clipboard/copy/runTests.test.ts
+++ b/tests/src/unit/core/clipboard/copy/runTests.test.ts
@@ -2,7 +2,10 @@ import { describe, it } from "vitest";
 
 import { createTestEditor } from "../../createTestEditor.js";
 import { testSchema } from "../../testSchema.js";
-import { copyTestInstancesHTML } from "./copyTestInstances.js";
+import {
+  copyTestInstancesHTML,
+  copyTestInstancesMarkdown,
+} from "./copyTestInstances.js";
 
 // Tests for verifying content that gets put on the clipboard when copying
 // within the editor. Used for as many cases as possible to ensure each block or
@@ -16,3 +19,13 @@ describe("Copy tests (HTML)", () => {
     });
   }
 });
+
+describe("Copy tests (Markdown)", () => {
+  const getEditor = createTestEditor(testSchema);
+
+  for (const { testCase, executeTest } of copyTestInstancesMarkdown) {
+    it(`${testCase.name}`, async () => {
+      await executeTest(getEditor(), testCase);
+    });
+  }
+});
diff --git a/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/codeBlock/contains-newlines.html b/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/codeBlock/contains-newlines.html
index f169947d1e..bf789c1a7d 100644
--- a/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/codeBlock/contains-newlines.html
+++ b/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/codeBlock/contains-newlines.html
@@ -13,7 +13,9 @@
           
         
         
-          const hello ='world';console.log(hello);
+          const hello = 'world';
+console.log(hello);
+
         

       
     
diff --git a/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/codeBlock/empty.html b/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/codeBlock/empty.html
index c25f830ff4..ce97dbaaac 100644
--- a/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/codeBlock/empty.html
+++ b/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/codeBlock/empty.html
@@ -9,9 +9,7 @@
           
         
         
-          
-            
-          
+          
         

       
     
diff --git a/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/style/mixedInParagraph.html b/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/style/mixedInParagraph.html
index 5bc3a5a734..b8f217f641 100644
--- a/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/style/mixedInParagraph.html
+++ b/tests/src/unit/core/formatConversion/export/__snapshots__/blocknoteHTML/style/mixedInParagraph.html
@@ -6,7 +6,7 @@
           Normal
           bold
           italic
-          code
+          code 
           strike
         

       
diff --git a/tests/src/unit/core/formatConversion/export/__snapshots__/html/codeBlock/contains-newlines.html b/tests/src/unit/core/formatConversion/export/__snapshots__/html/codeBlock/contains-newlines.html
index df88fa0937..a7db81b06b 100644
--- a/tests/src/unit/core/formatConversion/export/__snapshots__/html/codeBlock/contains-newlines.html
+++ b/tests/src/unit/core/formatConversion/export/__snapshots__/html/codeBlock/contains-newlines.html
@@ -1,8 +1,5 @@
 
-  
-    const hello ='world';
-    

-    console.log(hello);
-    

-  
+  const hello = 'world';
+console.log(hello);
+
 

\ No newline at end of file
diff --git a/tests/src/unit/core/formatConversion/export/__snapshots__/html/style/mixedInParagraph.html b/tests/src/unit/core/formatConversion/export/__snapshots__/html/style/mixedInParagraph.html
index 8be1d165ce..369fd1b3bf 100644
--- a/tests/src/unit/core/formatConversion/export/__snapshots__/html/style/mixedInParagraph.html
+++ b/tests/src/unit/core/formatConversion/export/__snapshots__/html/style/mixedInParagraph.html
@@ -2,6 +2,6 @@
   Normal
   bold
   italic
-  code
+  code 
   strike
 

\ No newline at end of file
diff --git a/tests/src/unit/shared/clipboard/copyPasteEquality/copyPasteEqualityTestExecutors.ts b/tests/src/unit/shared/clipboard/copyPasteEquality/copyPasteEqualityTestExecutors.ts
index 1fdfb61013..5a6a22f322 100644
--- a/tests/src/unit/shared/clipboard/copyPasteEquality/copyPasteEqualityTestExecutors.ts
+++ b/tests/src/unit/shared/clipboard/copyPasteEquality/copyPasteEqualityTestExecutors.ts
@@ -21,7 +21,7 @@ export const testCopyPasteEquality = async <
 ) => {
   initTestEditor(editor, testCase.document, testCase.getCopyAndPasteSelection);
 
-  const { clipboardHTML } = selectedFragmentToHTML(
+  const { clipboardHTML, markdown } = selectedFragmentToHTML(
     editor.prosemirrorView,
     editor,
   );
@@ -29,7 +29,7 @@ export const testCopyPasteEquality = async <
   const originalDocument = editor.document;
   doPaste(
     editor.prosemirrorView,
-    "text",
+    markdown,
     clipboardHTML,
     false,
     new ClipboardEvent("paste"),
diff --git a/tests/src/unit/shared/formatConversion/export/exportTestExecutors.ts b/tests/src/unit/shared/formatConversion/export/exportTestExecutors.ts
index e7ccef6e5b..1a8893b2b8 100644
--- a/tests/src/unit/shared/formatConversion/export/exportTestExecutors.ts
+++ b/tests/src/unit/shared/formatConversion/export/exportTestExecutors.ts
@@ -11,6 +11,10 @@ import { expect } from "vitest";
 
 import { ExportTestCase } from "./exportTestCase.js";
 
+// Preserve `` whitespace so code-block snapshots show actual newlines
+// instead of having them collapsed by the prettifier.
+const PRETTIFY_OPTIONS = { tag_wrap: true, ignore: ["code"] };
+
 export const testExportBlockNoteHTML = async <
   B extends BlockSchema,
   I extends InlineContentSchema,
@@ -24,9 +28,7 @@ export const testExportBlockNoteHTML = async <
   addIdsToBlocks(testCase.content);
 
   await expect(
-    prettify(await editor.blocksToFullHTML(testCase.content), {
-      tag_wrap: true,
-    }),
+    prettify(await editor.blocksToFullHTML(testCase.content), PRETTIFY_OPTIONS),
   ).toMatchFileSnapshot(`./__snapshots__/blocknoteHTML/${testCase.name}.html`);
 };
 
@@ -43,9 +45,7 @@ export const testExportHTML = async <
   addIdsToBlocks(testCase.content);
 
   await expect(
-    prettify(await editor.blocksToHTMLLossy(testCase.content), {
-      tag_wrap: true,
-    }),
+    prettify(await editor.blocksToHTMLLossy(testCase.content), PRETTIFY_OPTIONS),
   ).toMatchFileSnapshot(`./__snapshots__/html/${testCase.name}.html`);
 };