diff --git a/weasyprint/css/validation.py b/weasyprint/css/validation.py
index 068b51ae..4e1a1fe1 100644
--- a/weasyprint/css/validation.py
+++ b/weasyprint/css/validation.py
@@ -459,9 +459,9 @@ def counter(tokens, default_integer):
 @validator('margin-bottom')
 @validator('margin-left')
 @single_token
-def lenght_precentage_or_auto(token, negative=True):
+def lenght_precentage_or_auto(token):
     """``margin-*`` properties validation."""
-    length = get_length(token, negative, percentage=True)
+    length = get_length(token, percentage=True)
     if length:
         return length
     if get_keyword(token) == 'auto':
@@ -473,7 +473,11 @@ def lenght_precentage_or_auto(token, negative=True):
 @single_token
 def width_height(token):
     """Validation for the ``width`` and ``height`` properties."""
-    return lenght_precentage_or_auto.__func__(token, negative=False)
+    length = get_length(token, negative=False, percentage=True)
+    if length:
+        return length
+    if get_keyword(token) == 'auto':
+        return 'auto'
 
 
 @validator()
@@ -599,7 +603,7 @@ def list_style_type(keyword):
 @single_token
 def length_or_precentage(token):
     """``padding-*`` properties validation."""
-    length = get_length(token, negative=False)
+    length = get_length(token, negative=False, percentage=True)
     if length:
         return length
 
diff --git a/weasyprint/tests/test_css_validation.py b/weasyprint/tests/test_css_validation.py
index 975f5c49..722181c4 100644
--- a/weasyprint/tests/test_css_validation.py
+++ b/weasyprint/tests/test_css_validation.py
@@ -133,6 +133,8 @@ def test_transforms():
     assert expand_to_dict('-weasy-transform: translate(6px) rotate(90deg)'
         ) == {'transform': [('translate', ((6, 'px'), (0, 'px'))),
                             ('rotate', (90, 'deg'))]}
+    assert expand_to_dict('-weasy-transform: translate(-4px, 0)'
+        ) == {'transform': [('translate', ((-4, 'px'), (0, None)))]}
     assert expand_to_dict('-weasy-transform: translate(6px, 20%)'
         ) == {'transform': [('translate', ((6, 'px'), (20, '%')))]}
     assert expand_to_dict('-weasy-transform: scale(2)'
@@ -162,16 +164,22 @@ def test_expand_four_sides():
         'margin_bottom': (1, 'em'),
         'margin_left': (1, 'em'),
     }
+    assert expand_to_dict('margin: -1em auto 20%') == {
+        'margin_top': (-1, 'em'),
+        'margin_right': 'auto',
+        'margin_bottom': (20, '%'),
+        'margin_left': 'auto',
+    }
     assert expand_to_dict('padding: 1em 0') == {
         'padding_top': (1, 'em'),
         'padding_right': (0, None),
         'padding_bottom': (1, 'em'),
         'padding_left': (0, None),
     }
-    assert expand_to_dict('padding: 1em 0 2em') == {
+    assert expand_to_dict('padding: 1em 0 2%') == {
         'padding_top': (1, 'em'),
         'padding_right': (0, None),
-        'padding_bottom': (2, 'em'),
+        'padding_bottom': (2, '%'),
         'padding_left': (0, None),
     }
     assert expand_to_dict('padding: 1em 0 2em 5px') == {
@@ -183,6 +191,10 @@ def test_expand_four_sides():
     assert expand_to_dict('padding: 1 2 3 4 5',
         'Expected 1 to 4 token components got 5') == {}
     assert expand_to_dict('margin: rgb(0, 0, 0)', 'invalid') == {}
+    assert expand_to_dict('padding: auto', 'invalid') == {}
+    assert expand_to_dict('padding: -12px', 'invalid') == {}
+    assert expand_to_dict('border-width: -3em', 'invalid') == {}
+    assert expand_to_dict('border-width: 12%', 'invalid') == {}
 
 
 @assert_no_logs