diff --git a/src/app.ts b/src/app.ts
index c1b901b4..8cdbabe6 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -4,9 +4,11 @@ import { serveStatic } from '@hono/hono/deno';
 import { logger } from '@hono/hono/logger';
 import { NostrEvent, NostrSigner, NStore, NUploader } from '@nostrify/nostrify';
 import Debug from '@soapbox/stickynotes/debug';
+import { Kysely } from 'kysely';
 
 import '@/startup.ts';
 
+import { DittoTables } from '@/db/DittoTables.ts';
 import { Time } from '@/utils/time.ts';
 
 import {
@@ -133,7 +135,7 @@ import { storeMiddleware } from '@/middleware/storeMiddleware.ts';
 import { uploaderMiddleware } from '@/middleware/uploaderMiddleware.ts';
 import { translatorMiddleware } from '@/middleware/translatorMiddleware.ts';
 
-interface AppEnv extends HonoEnv {
+export interface AppEnv extends HonoEnv {
   Variables: {
     /** Signer to get the logged-in user's pubkey, relays, and to sign events, or `undefined` if the user isn't logged in. */
     signer?: NostrSigner;
@@ -141,6 +143,8 @@ interface AppEnv extends HonoEnv {
     uploader?: NUploader;
     /** NIP-98 signed event proving the pubkey is owned by the user. */
     proof?: NostrEvent;
+    /** Kysely instance for the database. */
+    kysely: Kysely<DittoTables>;
     /** Storage for the user, might filter out unwanted content. */
     store: NStore;
     /** Normalized pagination params. */
diff --git a/src/controllers/api/push.test.ts b/src/controllers/api/push.test.ts
new file mode 100644
index 00000000..0b7ed885
--- /dev/null
+++ b/src/controllers/api/push.test.ts
@@ -0,0 +1,31 @@
+import { Hono } from '@hono/hono';
+import { NSecSigner } from '@nostrify/nostrify';
+import { generateSecretKey } from 'nostr-tools';
+
+import { type AppEnv } from '@/app.ts';
+import { createTestDB } from '@/test.ts';
+import { pushSubscribeController } from '@/controllers/api/push.ts';
+import { assertEquals } from '@std/assert';
+
+Deno.test('POST /api/v1/push/subscription creates the subscription in the database', async () => {
+  await using db = await createTestDB();
+  const signer = new NSecSigner(generateSecretKey());
+
+  const app = new Hono<AppEnv>().all((c) => {
+    c.set('kysely', db.kysely);
+    c.set('store', db.store);
+    c.set('signer', signer);
+  }, pushSubscribeController);
+
+  const response = await app.request('/api/v1/push/subscription', {
+    body: JSON.stringify({
+      endpoint: 'https://example.com',
+      keys: {
+        p256dh: 'p256dh',
+        auth: 'auth',
+      },
+    }),
+  });
+
+  assertEquals(response.status, 200);
+});