diff --git a/test/formatter_test.exs b/test/formatter_test.exs
index bb318b7d5..cfa735795 100644
--- a/test/formatter_test.exs
+++ b/test/formatter_test.exs
@@ -22,6 +22,18 @@ test "turns hashtags into links" do
       assert expected_text ==
                Formatter.add_hashtag_links({[], text}, tags) |> Formatter.finalize()
     end
+
+    test "does not turn html characters to tags" do
+      text = "Fact #3: pleroma does what mastodon't"
+
+      expected_text =
+        "Fact <a data-tag=\"3\" href=\"http://localhost:4001/tag/3\">#3</a>: pleroma does what mastodon't"
+
+      tags = Formatter.parse_tags(text)
+
+      assert expected_text ==
+               Formatter.add_hashtag_links({[], text}, tags) |> Formatter.finalize()
+    end
   end
 
   describe ".add_links" do