diff --git a/packages/mermaid/src/diagrams/class/classDiagramGrammar.spec.ts b/packages/mermaid/src/diagrams/class/classDiagramGrammar.spec.ts
deleted file mode 100644
index f7d93741a..000000000
--- a/packages/mermaid/src/diagrams/class/classDiagramGrammar.spec.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { readFile } from 'node:fs/promises';
-import { fileURLToPath } from 'node:url';
-// @ts-ignore - no types
-import { LALRGenerator } from 'jison';
-
-const getAbsolutePath = (relativePath: string) => {
-  return fileURLToPath(new URL(relativePath, import.meta.url));
-};
-
-describe('class diagram grammar', function () {
-  it('should have no conflicts', async function () {
-    const grammarSource = await readFile(getAbsolutePath('./parser/classDiagram.jison'), 'utf8');
-    const grammarParser = new LALRGenerator(grammarSource, {});
-    expect(grammarParser.conflicts).toBe(0);
-  });
-});