diff --git a/packages/mermaid/src/mermaidAPI.spec.ts b/packages/mermaid/src/mermaidAPI.spec.ts
index 92dae1723..1d4e0c963 100644
--- a/packages/mermaid/src/mermaidAPI.spec.ts
+++ b/packages/mermaid/src/mermaidAPI.spec.ts
@@ -444,9 +444,14 @@ describe('mermaidAPI', () => {
         '\ndefault' +
         '\n.classDef1 > * { style1-1 !important; }' +
         '\n.classDef1 span { style1-1 !important; }';
-      expect(getStyles).toHaveBeenCalledWith('flowchart-v2', expectedStyles, {
-        fontFamily: 'serif',
-      });
+      expect(getStyles).toHaveBeenCalledWith(
+        'flowchart-v2',
+        expectedStyles,
+        {
+          fontFamily: 'serif',
+        },
+        'someId'
+      );
     });
 
     it('calls getStyles to get css for all graph, user css styles, and config theme variables', () => {