1 files changed, 4 insertions, 0 deletions
diff --git a/test/background/mock/MockTabPresenter.ts b/test/background/mock/MockTabPresenter.ts
index 22fb947..0968e44 100644
--- a/test/background/mock/MockTabPresenter.ts
+++ b/test/background/mock/MockTabPresenter.ts
@@ -176,4 +176,8 @@ export default class MockTabPresenter implements TabPresenter {
     this.zooms[index] = factor;
     return Promise.resolve();
   }
+
+  toggleReaderMode(_tabId: number): Promise<void> {
+    throw new Error("not implemented");
+  }
 }