diff --git a/tests/test_pdf.py b/tests/test_pdf.py
index 02b355dd7c..6d16ee2f2c 100644
--- a/tests/test_pdf.py
+++ b/tests/test_pdf.py
@@ -288,11 +288,6 @@ def test_bookmarks_14():
              f </h1>
       <h1> g <span> h </span> i </h1>
     ''').write_pdf()
-    # a
-    # |_ b
-    # |_ c
-    # L_ d
-    # e
     assert re.findall(b'/Count ([0-9-]*)', pdf)[-1] == b'4'
     assert re.findall(b'/Title \\((.*)\\)', pdf) == [
         b'a', b'b c d', b'e f', b'g h i']
diff --git a/weasyprint/formatting_structure/boxes.py b/weasyprint/formatting_structure/boxes.py
index bc1fa845d2..e55c5e3a1b 100644
--- a/weasyprint/formatting_structure/boxes.py
+++ b/weasyprint/formatting_structure/boxes.py
@@ -468,25 +468,9 @@ class TextBox(InlineLevelBox):
     """
     justification_spacing = 0
 
-    # http://stackoverflow.com/questions/16317534/
-    ascii_to_wide = {i: chr(i + 0xfee0) for i in range(0x21, 0x7f)}
-    ascii_to_wide.update({0x20: '\u3000', 0x2D: '\u2212'})
-
     def __init__(self, element_tag, style, element, text):
         assert text
         super().__init__(element_tag, style, element)
-        self.original_text = text
-        text_transform = style['text_transform']
-        if text_transform != 'none':
-            text = {
-                'uppercase': lambda t: t.upper(),
-                'lowercase': lambda t: t.lower(),
-                # Python’s unicode.captitalize is not the same.
-                'capitalize': lambda t: t.title(),
-                'full-width': lambda t: t.translate(self.ascii_to_wide),
-            }[text_transform](text)
-        if style['hyphens'] == 'none':
-            text = text.replace('\u00AD', '')  # U+00AD SOFT HYPHEN (SHY)
         self.text = text
 
     def copy_with_text(self, text):
diff --git a/weasyprint/formatting_structure/build.py b/weasyprint/formatting_structure/build.py
index ed424465c3..425af9d5dc 100644
--- a/weasyprint/formatting_structure/build.py
+++ b/weasyprint/formatting_structure/build.py
@@ -45,6 +45,10 @@
     ('table-caption',): boxes.TableCaptionBox,
 }
 
+# http://stackoverflow.com/questions/16317534/
+ASCII_TO_WIDE = {i: chr(i + 0xfee0) for i in range(0x21, 0x7f)}
+ASCII_TO_WIDE.update({0x20: '\u3000', 0x2D: '\u2212'})
+
 
 def build_formatting_structure(element_tree, style_for, get_image_from_uri,
                                base_url, target_collector, counter_style):
@@ -190,9 +194,9 @@ def element_to_box(element, style_for, get_image_from_uri, base_url,
 
     box.children = children
     process_whitespace(box)
-    # calculate string-set and bookmark-label
     set_content_lists(
         element, box, style, counter_values, target_collector, counter_style)
+    process_text_transform(box)
 
     if marker_boxes and len(box.children) == 1:
         # See https://www.w3.org/TR/css-lists-3/#list-style-position-outside
@@ -374,7 +378,6 @@ def add_text(text):
         has_text.add(True)
         if text:
             if content_boxes and isinstance(content_boxes[-1], boxes.TextBox):
-                content_boxes[-1].original_text += text
                 content_boxes[-1].text += text
             else:
                 content_boxes.append(
@@ -1256,6 +1259,26 @@ def process_whitespace(box, following_collapsible_space=False):
     return following_collapsible_space
 
 
+def process_text_transform(box):
+    if isinstance(box, boxes.TextBox):
+        text_transform = box.style['text_transform']
+        if text_transform != 'none':
+            box.text = {
+                'uppercase': lambda text: text.upper(),
+                'lowercase': lambda text: text.lower(),
+                # Python’s unicode.captitalize is not the same.
+                'capitalize': lambda text: text.title(),
+                'full-width': lambda text: text.translate(ASCII_TO_WIDE),
+            }[text_transform](box.text)
+        if box.style['hyphens'] == 'none':
+            box.text = box.text.replace('\u00AD', '')  # U+00AD is soft hyphen
+
+    if isinstance(box, boxes.ParentBox) and not box.is_running():
+        for child in box.children:
+            if isinstance(child, (boxes.TextBox, boxes.InlineBox)):
+                process_text_transform(child)
+
+
 def inline_in_block(box):
     """Build the structure of lines inside blocks and return a new box tree.
 
@@ -1547,10 +1570,10 @@ def set_viewport_overflow(root_box):
 
 def box_text(box):
     if isinstance(box, boxes.TextBox):
-        return box.original_text
+        return box.text
     elif isinstance(box, boxes.ParentBox):
         return ''.join(
-            child.original_text for child in box.descendants()
+            child.text for child in box.descendants()
             if not child.element_tag.endswith('::before') and
             not child.element_tag.endswith('::after') and
             not child.element_tag.endswith('::marker') and
diff --git a/weasyprint/layout/page.py b/weasyprint/layout/page.py
index 1efd81962d..f567c0b805 100644
--- a/weasyprint/layout/page.py
+++ b/weasyprint/layout/page.py
@@ -342,6 +342,7 @@ def make_box(at_keyword, containing_block):
                 context.get_image_from_uri, context.target_collector,
                 context.counter_style, context, page)
             build.process_whitespace(box)
+            build.process_text_transform(box)
             box = build.anonymous_table_boxes(box)
             box = build.flex_boxes(box)
             box = build.inline_in_block(box)