diff --git a/tests/layout/test_list.py b/tests/layout/test_list.py
index 98c7f7936..b0c9daa18 100644
--- a/tests/layout/test_list.py
+++ b/tests/layout/test_list.py
@@ -129,3 +129,22 @@ def test_lists_page_break_margin():
             assert (
                 li.children[0].position_y ==
                 li.children[1].children[0].position_y)
+
+
+def test_lists_marker_content():
+    # Regression test for #2918.
+    page, = render_pages('''
+      <style>
+        ::marker { content: 'a' }
+      </style>
+      <ul>
+        <li>b</li>
+      </ul>
+    ''')
+    html, = page.children
+    body, = html.children
+    ul, = body.children
+    li, = ul.children
+    marker, li = li.children
+    assert marker.children[0].children[0].text == 'a'
+    assert li.children[0].children[0].text == 'b'
diff --git a/tests/resources/tests_ua.css b/tests/resources/tests_ua.css
index c94c83b07..f8d88bdda 100644
--- a/tests/resources/tests_ua.css
+++ b/tests/resources/tests_ua.css
@@ -30,6 +30,8 @@ h4        { bookmark-level: 4; bookmark-label: content(text) }
 h5        { bookmark-level: 5; bookmark-label: content(text) }
 h6        { bookmark-level: 6; bookmark-label: content(text) }
 
+::marker  { white-space: pre }
+
 ::footnote-call   { content: counter(footnote) }
 ::footnote-marker { content: counter(footnote) '.' }
 ::note-call       { content: counter(note) }
diff --git a/weasyprint/formatting_structure/build.py b/weasyprint/formatting_structure/build.py
index 3074ac860..b10301ff8 100644
--- a/weasyprint/formatting_structure/build.py
+++ b/weasyprint/formatting_structure/build.py
@@ -366,7 +366,6 @@ def marker_to_box(element, state, parent_style, style_for, get_image_from_uri,
             counter_type = style['list_style_type']
             if marker_text := counter_style.render_marker(counter_type, counter_value):
                 box = boxes.TextBox.anonymous_from(box, marker_text)
-                box.style['white_space'] = 'pre-wrap'
                 children.append(box)
 
     if not children:
@@ -376,6 +375,7 @@ def marker_to_box(element, state, parent_style, style_for, get_image_from_uri,
         marker_box = boxes.BlockBox.anonymous_from(box, children)
         # We can safely edit everything that can't be changed by user style
         # See https://drafts.csswg.org/css-pseudo-4/#marker-pseudo
+        marker_box.style = marker_box.style.copy()
         marker_box.style['position'] = 'absolute'
         marker_box.is_outside_marker = True
     else: