diff --git a/test/pleroma/web/common_api/utils_test.exs b/test/pleroma/web/common_api/utils_test.exs
index ab6392b1f..28b05ed91 100644
--- a/test/pleroma/web/common_api/utils_test.exs
+++ b/test/pleroma/web/common_api/utils_test.exs
@@ -175,6 +175,54 @@ defmodule Pleroma.Web.CommonAPI.UtilsTest do
       assert result == "<p>Hello</p><p>World!</p>"
     end
 
+    test "links" do
+      code = "https://en.wikipedia.org/wiki/Animal_Crossing_(video_game)"
+      {result, [], []} = Utils.format_input(code, "text/markdown")
+      assert result == ~s[<p><a href="#{code}">#{code}</a></p>]
+
+      code = "https://github.com/pragdave/earmark/"
+      {result, [], []} = Utils.format_input(code, "text/markdown")
+      assert result == ~s[<p><a href="#{code}">#{code}</a></p>]
+    end
+
+    test "link with local mention" do
+      insert(:user, %{nickname: "lain"})
+
+      code = "https://example.com/@lain"
+      {result, [], []} = Utils.format_input(code, "text/markdown")
+      assert result == ~s[<p><a href="#{code}">#{code}</a></p>]
+    end
+
+    test "local mentions" do
+      mario = insert(:user, %{nickname: "mario"})
+      luigi = insert(:user, %{nickname: "luigi"})
+
+      code = "@mario @luigi yo what's up?"
+      {result, _, []} = Utils.format_input(code, "text/markdown")
+
+      assert result ==
+               ~s[<p><span class="h-card"><a class="u-url mention" data-user="#{mario.id}" href="#{
+                 mario.ap_id
+               }" rel="ugc">@<span>mario</span></a></span> <span class="h-card"><a class="u-url mention" data-user="#{
+                 luigi.id
+               }" href="#{luigi.ap_id}" rel="ugc">@<span>luigi</span></a></span> yo what’s up?</p>]
+    end
+
+    test "remote mentions" do
+      mario = insert(:user, %{nickname: "mario@mushroom.kingdom", local: false})
+      luigi = insert(:user, %{nickname: "luigi@mushroom.kingdom", local: false})
+
+      code = "@mario@mushroom.kingdom @luigi@mushroom.kingdom yo what's up?"
+      {result, _, []} = Utils.format_input(code, "text/markdown")
+
+      assert result ==
+               ~s[<p><span class="h-card"><a class="u-url mention" data-user="#{mario.id}" href="#{
+                 mario.ap_id
+               }" rel="ugc">@<span>mario</span></a></span> <span class="h-card"><a class="u-url mention" data-user="#{
+                 luigi.id
+               }" href="#{luigi.ap_id}" rel="ugc">@<span>luigi</span></a></span> yo what’s up?</p>]
+    end
+
     test "raw HTML" do
       code = ~s[<a href="http://example.org/">OwO</a><!-- what's this?-->]
       {result, [], []} = Utils.format_input(code, "text/markdown")
@@ -205,6 +253,10 @@ defmodule Pleroma.Web.CommonAPI.UtilsTest do
       code = ~s[```\nputs "Hello World"\n```]
       {result, [], []} = Utils.format_input(code, "text/markdown")
       assert result == ~s[<pre><code>puts &quot;Hello World&quot;</code></pre>]
+
+      code = ~s[    <div>\n    </div>]
+      {result, [], []} = Utils.format_input(code, "text/markdown")
+      assert result == ~s[<pre><code>&lt;div&gt;\n&lt;/div&gt;</code></pre>]
     end
 
     test "lists" do