diff --git a/weasyprint/tests/test_boxes.py b/weasyprint/tests/test_boxes.py
index a16c140c..c4a6f025 100644
--- a/weasyprint/tests/test_boxes.py
+++ b/weasyprint/tests/test_boxes.py
@@ -79,15 +79,6 @@ def to_lists(box_tree):
     return serialize(unwrap_html_body(box_tree))
 
 
-def validate_float(
-        real_non_shorthand, base_url, name, values, required=False):
-    """Fake validator for ``float``."""
-    value = values[0].value
-    if name == 'float' and value == 'left':
-        return [(name, value)]
-    return real_non_shorthand(base_url, name, values, required)
-
-
 @contextlib.contextmanager
 def monkeypatch_validation(replacement):
     """Create a context manager patching the validation mechanism.
@@ -112,12 +103,11 @@ def monkeypatch_validation(replacement):
 
 def parse(html_content):
     """Parse some HTML, apply stylesheets and transform to boxes."""
-    with monkeypatch_validation(validate_float):
-        document = TestPNGDocument(html_content,
-            # Dummy filename, but in the right directory.
-            base_url=resource_filename('<test>'))
-        box, = build.dom_to_box(document, document.dom)
-        return box
+    document = TestPNGDocument(html_content,
+        # Dummy filename, but in the right directory.
+        base_url=resource_filename('<test>'))
+    box, = build.dom_to_box(document, document.dom)
+    return box
 
 
 def parse_all(html_content, base_url=resource_filename('<test>')):
diff --git a/weasyprint/tests/test_layout.py b/weasyprint/tests/test_layout.py
index 79a8c5fd..44be26fc 100644
--- a/weasyprint/tests/test_layout.py
+++ b/weasyprint/tests/test_layout.py
@@ -15,7 +15,7 @@ from __future__ import division, unicode_literals
 
 from .testing_utils import (
     TestPNGDocument, resource_filename, FONTS, assert_no_logs, capture_logs)
-from .test_boxes import monkeypatch_validation, validate_float
+from .test_boxes import monkeypatch_validation
 from ..formatting_structure import boxes
 from ..layout.inlines import split_inline_box
 from ..layout.percentages import resolve_percentages
@@ -39,14 +39,12 @@ def parse_without_layout(html_content):
 
 def parse(html_content, return_document=False):
     """Parse some HTML, apply stylesheets, transform to boxes and lay out."""
-    # TODO: remove this patching when floats are validated
-    with monkeypatch_validation(validate_float):
-        document = TestPNGDocument(html_content,
-            base_url=resource_filename('<inline HTML>'))
-        if return_document:
-            return document
-        else:
-            return document.pages
+    document = TestPNGDocument(html_content,
+        base_url=resource_filename('<inline HTML>'))
+    if return_document:
+        return document
+    else:
+        return document.pages
 
 
 @assert_no_logs