diff --git a/packages/main/tests/unit.spec.ts b/packages/main/tests/unit.spec.ts
index b621346..3b12d73 100644
--- a/packages/main/tests/unit.spec.ts
+++ b/packages/main/tests/unit.spec.ts
@@ -22,6 +22,11 @@ vi.mock('electron', () => {
   bw.prototype.focus = vi.fn();
   bw.prototype.restore = vi.fn();
   bw.prototype.setMenuBarVisibility = vi.fn();
+  bw.prototype.webContents = {
+    session: {
+      on: vi.fn(),
+    },
+  };
 
   const app: Pick<Electron.App, 'getAppPath' | 'getPath' | 'getVersion' | 'on'> = {
     getAppPath(): string {