diff --git a/packages/mermaid/src/rendering-util/splitText.spec.ts b/packages/mermaid/src/rendering-util/splitText.spec.ts
index 00db27ea2..017fe9c6a 100644
--- a/packages/mermaid/src/rendering-util/splitText.spec.ts
+++ b/packages/mermaid/src/rendering-util/splitText.spec.ts
@@ -62,7 +62,11 @@ describe('when Intl.Segmenter is available', () => {
   });
 });
 
-describe('when Intl.segmenter is not available', () => {
+/**
+ * Intl.Segmenter is not supported in Firefox yet,
+ * see https://bugzilla.mozilla.org/show_bug.cgi?id=1423593 
+ */
+describe('when Intl.Segmenter is not available', () => {
   beforeAll(() => {
     vi.stubGlobal('Intl', { Segmenter: undefined });
   });