diff --git a/extension.json b/extension.json
index 941904f2d..7c93e45f8 100644
--- a/extension.json
+++ b/extension.json
@@ -257,6 +257,8 @@
 			"cases/split-list/split-list-modified.html",
 			"cases/split-list2/split-list2.html",
 			"cases/split-list2/split-list2-modified.html",
+			"cases/mixed-indentation/mixed-indentation.html",
+			"cases/mixed-indentation/mixed-indentation-modified.html",
 			"cases/wrappers/wrappers.html",
 			"cases/wrappers/wrappers-modified.html",
 			"cases/signatures-funny/signatures-funny.html",
diff --git a/tests/cases/mixed-indentation/mixed-indentation-modified.html b/tests/cases/mixed-indentation/mixed-indentation-modified.html
new file mode 100644
index 000000000..8c0437c26
--- /dev/null
+++ b/tests/cases/mixed-indentation/mixed-indentation-modified.html
@@ -0,0 +1,11 @@
+<div class="mw-parser-output"><h2><span class="mw-headline" id="1">1</span></h2>
+<p>Comment
+</p>
+<ul><li>with list <a href="/wiki/User:Matma_Rex" title="User:Matma Rex">Matma Rex</a> (<a href="/wiki/User_talk:Matma_Rex" title="User talk:Matma Rex"><font color="green"><i>talk</i></font></a>) 23:01, 29 July 2020 (UTC)</li></ul><dl><dd data-parsoid="{}">Reply to Matma Rex|2020-07-29T23:01:00.000Z|0</dd></dl>
+<h2><span class="mw-headline" id="2">2</span></h2>
+<p>Comment
+</p>
+<ul><li>with list</li></ul>
+<p>and PS <a href="/wiki/User:Matma_Rex" title="User:Matma Rex">Matma Rex</a> (<a href="/wiki/User_talk:Matma_Rex" title="User talk:Matma Rex"><font color="green"><i>talk</i></font></a>) 23:01, 29 July 2020 (UTC)
+</p><dl><dd data-parsoid="{}">Reply to Matma Rex|2020-07-29T23:01:00.000Z|1</dd></dl>
+</div>
diff --git a/tests/cases/mixed-indentation/mixed-indentation.html b/tests/cases/mixed-indentation/mixed-indentation.html
new file mode 100644
index 000000000..b52c218a9
--- /dev/null
+++ b/tests/cases/mixed-indentation/mixed-indentation.html
@@ -0,0 +1,11 @@
+<div class="mw-parser-output"><h2><span class="mw-headline" id="1">1</span></h2>
+<p>Comment
+</p>
+<ul><li>with list <a href="/wiki/User:Matma_Rex" title="User:Matma Rex">Matma Rex</a> (<a href="/wiki/User_talk:Matma_Rex" title="User talk:Matma Rex"><font color="green"><i>talk</i></font></a>) 23:01, 29 July 2020 (UTC)</li></ul>
+<h2><span class="mw-headline" id="2">2</span></h2>
+<p>Comment
+</p>
+<ul><li>with list</li></ul>
+<p>and PS <a href="/wiki/User:Matma_Rex" title="User:Matma Rex">Matma Rex</a> (<a href="/wiki/User_talk:Matma_Rex" title="User talk:Matma Rex"><font color="green"><i>talk</i></font></a>) 23:01, 29 July 2020 (UTC)
+</p>
+</div>
diff --git a/tests/cases/modified.json b/tests/cases/modified.json
index 7bda1830a..e0f40d8ab 100644
--- a/tests/cases/modified.json
+++ b/tests/cases/modified.json
@@ -55,6 +55,13 @@
 		"config": "../data/enwiki-config.json",
 		"data": "../data/enwiki-data.json"
 	},
+	{
+		"name": "Replies to comments with mixed indentation",
+		"dom": "cases/mixed-indentation/mixed-indentation.html",
+		"expected": "cases/mixed-indentation/mixed-indentation-modified.html",
+		"config": "../data/enwiki-config.json",
+		"data": "../data/enwiki-data.json"
+	},
 	{
 		"name": "Reply inserted inside/outside various wrapper elements",
 		"dom": "cases/wrappers/wrappers.html",