fix getCapabilities stub

test/test-utils.js

@@ -96,7 +96,7 @@ export function createTestClient() {
             },
         },
         decryptEventIfNeeded: () => Promise.resolve(),
-        getCapabilities: jest.fn().mockReturnValue({}),
+        getCapabilities: jest.fn().mockResolvedValue({}),
     };
 }