diff --git a/components/style/properties/longhand/padding.mako.rs b/components/style/properties/longhand/padding.mako.rs
index 593deb769ac5..ce74320f2204 100644
--- a/components/style/properties/longhand/padding.mako.rs
+++ b/components/style/properties/longhand/padding.mako.rs
@@ -18,5 +18,6 @@
                               alias=maybe_moz_logical_alias(product, side, "-moz-padding-%s"),
                               animation_value_type="ComputedValue",
                               logical = side[1],
-                              spec = spec)}
+                              spec = spec,
+                              allow_quirks=not side[1])}
 % endfor
diff --git a/tests/wpt/metadata/quirks-mode/unitless-length.html.ini b/tests/wpt/metadata/quirks-mode/unitless-length.html.ini
index 3584ede282b0..65232359b5aa 100644
--- a/tests/wpt/metadata/quirks-mode/unitless-length.html.ini
+++ b/tests/wpt/metadata/quirks-mode/unitless-length.html.ini
@@ -12,18 +12,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding-top: 1 (quirks)]
-    expected: FAIL
-
-  [padding-right: 1 (quirks)]
-    expected: FAIL
-
-  [padding-bottom: 1 (quirks)]
-    expected: FAIL
-
-  [padding-left: 1 (quirks)]
-    expected: FAIL
-
   [padding: 1 (quirks)]
     expected: FAIL
 
@@ -60,18 +48,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding-top: +1 (quirks)]
-    expected: FAIL
-
-  [padding-right: +1 (quirks)]
-    expected: FAIL
-
-  [padding-bottom: +1 (quirks)]
-    expected: FAIL
-
-  [padding-left: +1 (quirks)]
-    expected: FAIL
-
   [padding: +1 (quirks)]
     expected: FAIL
 
@@ -144,18 +120,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding-top: 1.5 (quirks)]
-    expected: FAIL
-
-  [padding-right: 1.5 (quirks)]
-    expected: FAIL
-
-  [padding-bottom: 1.5 (quirks)]
-    expected: FAIL
-
-  [padding-left: 1.5 (quirks)]
-    expected: FAIL
-
   [padding: 1.5 (quirks)]
     expected: FAIL
 
@@ -192,18 +156,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding-top: +1.5 (quirks)]
-    expected: FAIL
-
-  [padding-right: +1.5 (quirks)]
-    expected: FAIL
-
-  [padding-bottom: +1.5 (quirks)]
-    expected: FAIL
-
-  [padding-left: +1.5 (quirks)]
-    expected: FAIL
-
   [padding: +1.5 (quirks)]
     expected: FAIL
 
@@ -1247,16 +1199,3 @@
   [top: calc(2 * 2px) (standards)]
     expected:
       if os == "mac": FAIL
-
-  [padding: 1px 2 (quirks)]
-    expected: FAIL
-
-  [padding: 1 2px (quirks)]
-    expected: FAIL
-
-  [padding: 1 +2 (quirks)]
-    expected: FAIL
-
-  [padding: 1 -2 (quirks)]
-    expected: FAIL
-