diff --git a/test/activitypub/out.js b/test/activitypub/out.js
new file mode 100644
index 0000000000..228c7a2b72
--- /dev/null
+++ b/test/activitypub/out.js
@@ -0,0 +1,71 @@
+'use strict';
+
+const assert = require('assert');
+const nconf = require('nconf');
+
+const db = require('../mocks/databasemock');
+const categories = require('../../src/categories');
+const posts = require('../../src/posts');
+const meta = require('../../src/meta');
+const install = require('../../src/install');
+const utils = require('../../src/utils');
+const activitypub = require('../../src/activitypub');
+
+const helpers = require('./helpers');
+
+describe('Outbound activities module', () => {
+	before(async () => {
+		meta.config.activitypubEnabled = 1;
+		await install.giveWorldPrivileges();
+	});
+
+	describe('.announce', () => {
+		describe('.topic() (remote topic; by cid)', () => {
+			let pid;
+			let note;
+			let tid;
+			let cid;
+
+			before(async () => {
+				({ id: pid, note } = helpers.mocks.note());
+				({ cid } = await categories.create({ name: utils.generateUUID() }));
+				await activitypub.notes.assert(0, pid, { skipChecks: 1, cid });
+				tid = await posts.getPostField(pid, 'tid');
+			});
+
+			after(() => {
+				activitypub._sent.clear();
+			});
+
+			it('should not error when called', async () => {
+				await activitypub.out.announce.topic(tid);
+			});
+
+			it('should send an Announce activity', () => {
+				assert.strictEqual(activitypub._sent.size, 1);
+
+				const { payload } = Array.from(activitypub._sent).pop()[1];
+				assert.strictEqual(payload.type, 'Announce');
+			});
+
+			it('should include the category\'s followers collection in cc', () => {
+				const { payload } = Array.from(activitypub._sent).pop()[1];
+				assert(payload.cc.includes(`${nconf.get('url')}/category/${cid}/followers`));
+			});
+
+			it('should include the author in cc', () => {
+				const { payload } = Array.from(activitypub._sent).pop()[1];
+				assert(payload.cc.includes(note.attributedTo));
+			});
+
+			it('should include the author in targets', () => {
+				const { targets } = Array.from(activitypub._sent).pop()[1];
+				assert(targets.includes(note.attributedTo));
+			});
+		});
+	});
+
+	// let uid;
+	// uid = await user.create({ username: utils.generateUUID().slice(0, 10) });
+
+});
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