diff --git a/commander/test/bootstrapping/commands/blockchain/hash.spec.ts b/commander/test/bootstrapping/commands/blockchain/hash.spec.ts
index d87bd01646..a63b506b82 100644
--- a/commander/test/bootstrapping/commands/blockchain/hash.spec.ts
+++ b/commander/test/bootstrapping/commands/blockchain/hash.spec.ts
@@ -53,6 +53,7 @@ describe('blockchain:hash', () => {
 					},
 				]),
 			),
+			close: jest.fn(),
 		} as never);
 		jest.spyOn(appUtils, 'getPid').mockReturnValue(pid);
 	});