diff --git a/src/posts/parse.js b/src/posts/parse.js
index b67c14526e..37cdd52c9c 100644
--- a/src/posts/parse.js
+++ b/src/posts/parse.js
@@ -57,6 +57,9 @@ module.exports = function (Posts) {
 			return postData;
 		}
 
+		if (!type.startsWith('activitypub.')) {
+			postData.content = postData.content.replace('[...]', '');
+		}
 		({ postData } = await plugins.hooks.fire('filter:parse.post', { postData, type }));
 		postData.content = translator.escape(postData.content);
 		if (postData.pid) {
diff --git a/test/activitypub/mocks.js b/test/activitypub/mocks.js
new file mode 100644
index 0000000000..2fce246e78
--- /dev/null
+++ b/test/activitypub/mocks.js
@@ -0,0 +1,88 @@
+'use strict';
+
+const assert = require('assert');
+const nconf = require('nconf');
+
+const db = require('../mocks/databasemock');
+const user = require('../../src/user');
+const categories = require('../../src/categories');
+const topics = require('../../src/topics');
+const posts = require('../../src/posts');
+const activitypub = require('../../src/activitypub');
+const utils = require('../../src/utils');
+
+describe('Mocking', () => {
+	describe('Outbound (local content to AP object)', () => {
+		describe('Notes', () => {
+			describe('.public()', () => {
+				before(async function () {
+					const { cid } = await categories.create({ name: utils.generateUUID() });
+					this.cid = cid;
+					this.uid = await user.create({ username: utils.generateUUID() });
+
+					let { postData } = await topics.post({
+						cid,
+						uid: this.uid,
+						title: utils.generateUUID(),
+						content: utils.generateUUID(),
+					});
+					this.note = await activitypub.mocks.notes.public(postData);
+
+					({ postData } = await topics.post({
+						cid,
+						uid: this.uid,
+						title: utils.generateUUID(),
+						content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.\
+							Aliquam vel augue, id luctus nulla. Mauris efficitur blandit neque et mattis.\
+							Etiam sodales et ipsum et ultricies. Nam non velit id arcu vestibulum suscipit.\
+							Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.\
+							Integer dui elit, placerat vitae porta in, euismod eu mi.\
+							Curabitur eget lorem dapibus, accumsan leo in, gravida magna.\
+							Donec fringilla rhoncus eros, eget auctor lectus imperdiet vitae. Nullam vitae urna leo.\
+							Curabitur eu viverra libero, vel malesuada lorem. Praesent condimentum eu felis nec tincidunt.\
+							Morbi nisl lorem, facilisis sed lorem at, venenatis. ',
+					}));
+					this.article = await activitypub.mocks.notes.public(postData);
+
+					({ postData } = await topics.post({
+						cid,
+						uid: this.uid,
+						title: utils.generateUUID(),
+						content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.\
+							Aliquam vel augue, id luctus nulla. Mauris efficitur blandit neque et mattis. [...]\
+							Etiam sodales et ipsum et ultricies. Nam non velit id arcu vestibulum suscipit.\
+							Curabitur eget lorem dapibus, accumsan leo in, gravida magna.\
+							Donec fringilla rhoncus eros, eget auctor lectus imperdiet vitae. Nullam vitae urna leo.\
+							Curabitur eu viverra libero, vel malesuada lorem. Praesent condimentum eu felis nec tincidunt.\
+							Morbi nisl lorem, facilisis sed lorem at, venenatis. ',
+					}));
+					this.withBreakPost = postData;
+					this.withBreak = await activitypub.mocks.notes.public(postData);
+				});
+
+				it('should report an OP with < 500 characters as a type Note', function () {
+					assert.strictEqual(this.note.type, 'Note');
+				});
+
+				it('should set a summary that is 500 characters or less', function () {
+					assert(this.article.summary.length < 500);
+				});
+
+				it('should end the summary with "[...]" if truncation happened', function () {
+					assert(this.article.summary.endsWith, '[...]');
+				});
+
+				it('should set a summary that contains everything before the magic break string (if one is set)', function () {
+					assert.strictEqual(this.withBreak.summary, 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.\
+							Aliquam vel augue, id luctus nulla. Mauris efficitur blandit neque et mattis. [...]');
+				});
+
+				it('should not contain the magic break string when content is parsed normally', async function () {
+					const clone = { ...this.withBreakPost };
+					const { content } = await posts.parsePost(clone);
+					assert(!content.includes('[...]'));
+				});
+			});
+		});
+	});
+});
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