diff --git a/src/storages/hydrate.test.ts b/src/storages/hydrate.test.ts
new file mode 100644
index 0000000..e9567a5
--- /dev/null
+++ b/src/storages/hydrate.test.ts
@@ -0,0 +1,33 @@
+import { assertEquals } from '@/deps-test.ts';
+import { EventsDB } from '@/storages/events-db.ts';
+import { db } from '@/db.ts';
+import { hydrateEvents } from '@/storages/hydrate.ts';
+
+import event0 from '~/fixtures/events/event-0.json' with { type: 'json' };
+import event1 from '~/fixtures/events/event-1.json' with { type: 'json' };
+
+const eventsDB = new EventsDB(db);
+
+Deno.test('hydrate author', async () => {
+  // Save events to database
+  await eventsDB.event(event1);
+  await eventsDB.event(event0);
+
+  assertEquals((event1 as any).author, undefined, "Event hasn't been hydrated yet");
+
+  const controller = new AbortController();
+  const timeoutId = setTimeout(() => controller.abort(), 1000);
+
+  await hydrateEvents({
+    events: [event1],
+    relations: ['author'],
+    storage: eventsDB,
+    signal: controller.signal,
+  });
+
+  const expectedEvent = { ...event1, author: event0 };
+
+  assertEquals(event1, expectedEvent);
+
+  clearTimeout(timeoutId);
+});