diff --git a/tests/Feature/Services/Social/BlueskyPublisherTest.php b/tests/Feature/Services/Social/BlueskyPublisherTest.php
index 25de1134..136c7b75 100644
--- a/tests/Feature/Services/Social/BlueskyPublisherTest.php
+++ b/tests/Feature/Services/Social/BlueskyPublisherTest.php
@@ -123,6 +123,27 @@
     });
 });
 
+test('bluesky publisher keeps a closing paren that has a matching open paren', function () {
+    $this->post->update(['content' => 'see https://en.wikipedia.org/wiki/Foo_(bar)']);
+
+    Http::fake([
+        config('trypost.platforms.bluesky.default_service').'/xrpc/com.atproto.repo.createRecord' => Http::response([
+            'uri' => 'at://did:plc:testuser123/app.bsky.feed.post/3abc123xyz',
+            'cid' => 'bafyreiabc123',
+        ], 200),
+    ]);
+
+    $this->publisher->publish($this->postPlatform);
+
+    Http::assertSent(function ($request) {
+        $link = collect($request['record']['facets'] ?? [])
+            ->first(fn ($facet) => $facet['features'][0]['$type'] === 'app.bsky.richtext.facet#link');
+
+        // The trailing ')' is part of the URL because it has a matching '('.
+        return $link && $link['features'][0]['uri'] === 'https://en.wikipedia.org/wiki/Foo_(bar)';
+    });
+});
+
 test('bluesky publisher computes byte offsets after multibyte characters', function () {
     $this->post->update(['content' => 'Olá 🎉 #café']);
 
diff --git a/tests/Unit/Services/Social/BlueskyLexiconTest.php b/tests/Unit/Services/Social/BlueskyLexiconTest.php
new file mode 100644
index 00000000..47916f27
--- /dev/null
+++ b/tests/Unit/Services/Social/BlueskyLexiconTest.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Services\Social\BlueskyLexicon;
+
+test('bluesky lexicon constants match their AT Protocol NSIDs', function (string $constant, string $nsid) {
+    expect($constant)->toBe($nsid);
+})->with([
+    [BlueskyLexicon::RESOLVE_HANDLE, 'com.atproto.identity.resolveHandle'],
+    [BlueskyLexicon::CREATE_RECORD, 'com.atproto.repo.createRecord'],
+    [BlueskyLexicon::UPLOAD_BLOB, 'com.atproto.repo.uploadBlob'],
+    [BlueskyLexicon::CREATE_SESSION, 'com.atproto.server.createSession'],
+    [BlueskyLexicon::REFRESH_SESSION, 'com.atproto.server.refreshSession'],
+    [BlueskyLexicon::FEED_POST, 'app.bsky.feed.post'],
+    [BlueskyLexicon::GET_POSTS, 'app.bsky.feed.getPosts'],
+    [BlueskyLexicon::GET_PROFILE, 'app.bsky.actor.getProfile'],
+    [BlueskyLexicon::EMBED_IMAGES, 'app.bsky.embed.images'],
+    [BlueskyLexicon::FACET_LINK, 'app.bsky.richtext.facet#link'],
+    [BlueskyLexicon::FACET_MENTION, 'app.bsky.richtext.facet#mention'],
+    [BlueskyLexicon::FACET_TAG, 'app.bsky.richtext.facet#tag'],
+]);