diff --git a/packages/mermaid/src/diagrams/state/stateDiagram-v2.spec.js b/packages/mermaid/src/diagrams/state/stateDiagram-v2.spec.js
index 970c19a58..c587970b5 100644
--- a/packages/mermaid/src/diagrams/state/stateDiagram-v2.spec.js
+++ b/packages/mermaid/src/diagrams/state/stateDiagram-v2.spec.js
@@ -451,11 +451,6 @@ describe('state diagram V2, ', function () {
 
       stateDb.clear();
 
-      parser.yy = {
-        ...stateDb,
-        addLink: stateDb.addLink.bind(stateDb),
-      };
-
       const doc = parser.parse(diagram);
       stateDb.extract(doc);