diff --git a/src/lib/litegraph/src/subgraph/SubgraphNode.titleButton.test.ts b/src/lib/litegraph/src/subgraph/SubgraphNode.titleButton.test.ts
index 55c9ade74..feb6b1d50 100644
--- a/src/lib/litegraph/src/subgraph/SubgraphNode.titleButton.test.ts
+++ b/src/lib/litegraph/src/subgraph/SubgraphNode.titleButton.test.ts
@@ -179,8 +179,7 @@ describe.skip('SubgraphNode Title Button', () => {
         150 - subgraphNode.pos[1] // 150 - 100 = 50
       ]
 
-      // @ts-expect-error onMouseDown possibly undefined
-      const handled = subgraphNode.onMouseDown(
+      const handled = subgraphNode.onMouseDown!(
         event as Partial<CanvasPointerEvent> as CanvasPointerEvent,
         clickPosRelativeToNode,
         canvas
@@ -226,8 +225,7 @@ describe.skip('SubgraphNode Title Button', () => {
         80 - subgraphNode.pos[1] // -20
       ]
 
-      // @ts-expect-error onMouseDown possibly undefined
-      const handled = subgraphNode.onMouseDown(
+      const handled = subgraphNode.onMouseDown!(
         event as Partial<CanvasPointerEvent> as CanvasPointerEvent,
         clickPosRelativeToNode,
         canvas