diff --git a/packages/compiler/src/frontend/lowering/class-dynamic-dispatch.test.ts b/packages/compiler/src/frontend/lowering/class-dynamic-dispatch.test.ts
index bbdf271c0..3e7b7783e 100644
--- a/packages/compiler/src/frontend/lowering/class-dynamic-dispatch.test.ts
+++ b/packages/compiler/src/frontend/lowering/class-dynamic-dispatch.test.ts
@@ -41,6 +41,7 @@ function context() {
     protocolDispatches: new Map(),
     classMethodValueSelections: new Map(),
     isSubclassOf: () => false,
+    nodeAtLoc: () => null,
   } as unknown as Lowerer;
   const boxed = fn("box", [
     statement({