diff --git a/tests/test_custom_filter.py b/tests/test_custom_filter.py
index da75dfa..c56062a 100644
--- a/tests/test_custom_filter.py
+++ b/tests/test_custom_filter.py
@@ -4,7 +4,7 @@ import tempfile
 
 from reader import Reader
 
-from discord_rss_bot.custom_filters import convert_to_md, encode_url, entry_is_blacklisted, entry_is_whitelisted
+from discord_rss_bot.custom_filters import encode_url, entry_is_blacklisted, entry_is_whitelisted
 from discord_rss_bot.settings import get_reader
 
 
@@ -104,30 +104,3 @@ def test_entry_is_blacklisted() -> None:
 
         # Close the reader, so we can delete the directory.
         custom_reader.close()
-
-
-def test_convert_to_md():
-    # Test normal input
-    assert (
-        convert_to_md("<h1>Headline</h1><h2>Subheadline</h2><h3>subsubheadline</h3>")
-        == """Headline
-========
-
-Subheadline
------------
-
-### subsubheadline
-
-"""
-    )
-    # Test input with tables
-    assert (
-        convert_to_md(
-            "<table><thead><tr><th>Column 1</th><th>Column 2</th><th>Column 3</th></tr></thead><tbody><tr><td>Row 1, Column 1</td><td>Row 1, Column 2</td><td>Row 1, Column 3</td></tr><tr><td>Row 2, Column 1</td><td>Row 2, Column 2</td><td>Row 2, Column 3</td></tr></tbody></table>"  # noqa: E501
-        )
-        == "Column 1Column 2Column 3Row 1, Column 1Row 1, Column 2Row 1, Column 3Row 2, Column 1Row 2, Column 2Row 2, Column 3"  # noqa: E501
-    )
-    # Test empty input
-    assert convert_to_md("") == ""
-    # Test input as None
-    assert convert_to_md(None) == ""  # type: ignore
diff --git a/tests/test_markdown.py b/tests/test_markdown.py
new file mode 100644
index 0000000..4020316
--- /dev/null
+++ b/tests/test_markdown.py
@@ -0,0 +1,62 @@
+from discord_rss_bot.markdown import convert_html_to_md
+
+
+def test_convert_to_md():
+    # Test bold
+    assert convert_html_to_md("<b>bold</b>") == "**bold**"
+
+    # Test italic
+    assert convert_html_to_md("<i>italic</i>") == "*italic*"
+
+    # Test blockquote
+    assert convert_html_to_md("<blockquote>blockquote</blockquote>") == ">>> blockquote"
+
+    # Test code
+    assert convert_html_to_md("<code>code</code>") == "`code`"
+
+    # Test strikethrough
+    assert convert_html_to_md("<s>strikethrough</s>") == "~~strikethrough~~"
+
+    # Test link
+    assert convert_html_to_md('<a href="https://example.com">link</a>') == "[link](https://example.com)"
+
+    # Test pre code
+    assert convert_html_to_md("<pre><code>pre code</code></pre>") == "``pre code``"
+
+    # Test strong
+    assert convert_html_to_md("<strong>strong</strong>") == "**strong**"
+
+    # Test multiple tags
+    assert (
+        convert_html_to_md(
+            '<b>bold</b> <i>italic</i> <a href="https://example.com">link</a> <code>code</code> <s>strikethrough</s>'
+        )
+        == "**bold** *italic* [link](https://example.com) `code` ~~strikethrough~~"
+    )
+
+    # Test removing all other tags
+    assert convert_html_to_md("<p>paragraph</p>") == "paragraph"
+    assert convert_html_to_md("<p>paragraph</p><p>paragraph</p>") == "paragraphparagraph"
+
+    # Test <br> tags
+    assert (
+        convert_html_to_md("<p>paragraph<br>paragraph</p>")
+        == """paragraph
+paragraph"""
+    )
+
+    # Test removing trailing newline
+    assert convert_html_to_md("paragraph ") == "paragraph"
+
+    # Test removing leading and trailing whitespace
+    assert convert_html_to_md(" paragraph ") == "paragraph"
+
+    # Test removing leading and trailing whitespace and trailing newline
+    assert (
+        convert_html_to_md(
+            """ paragraph
+                              
+                                """  # noqa: W293
+        )
+        == "paragraph"
+    )