diff --git a/components/style/properties/shorthand/padding.mako.rs b/components/style/properties/shorthand/padding.mako.rs
index a0e94f8bdcb..c07a80b1e04 100644
--- a/components/style/properties/shorthand/padding.mako.rs
+++ b/components/style/properties/shorthand/padding.mako.rs
@@ -5,4 +5,5 @@
 <%namespace name="helpers" file="/helpers.mako.rs" />
 
 ${helpers.four_sides_shorthand("padding", "padding-%s", "specified::LengthOrPercentage::parse",
-                               spec="https://drafts.csswg.org/css-box-3/#propdef-padding")}
+                               spec="https://drafts.csswg.org/css-box-3/#propdef-padding",
+                               allow_quirks=True)}
diff --git a/tests/wpt/metadata/quirks-mode/unitless-length.html.ini b/tests/wpt/metadata/quirks-mode/unitless-length.html.ini
index 65232359b5a..e3cbb4dc262 100644
--- a/tests/wpt/metadata/quirks-mode/unitless-length.html.ini
+++ b/tests/wpt/metadata/quirks-mode/unitless-length.html.ini
@@ -12,9 +12,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding: 1 (quirks)]
-    expected: FAIL
-
   [text-indent: 1 (quirks)]
     expected: FAIL
 
@@ -48,9 +45,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding: +1 (quirks)]
-    expected: FAIL
-
   [text-indent: +1 (quirks)]
     expected: FAIL
 
@@ -84,9 +78,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding: -1 (quirks)]
-    expected: FAIL
-
   [text-indent: -1 (quirks)]
     expected: FAIL
 
@@ -120,9 +111,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding: 1.5 (quirks)]
-    expected: FAIL
-
   [text-indent: 1.5 (quirks)]
     expected: FAIL
 
@@ -156,9 +144,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding: +1.5 (quirks)]
-    expected: FAIL
-
   [text-indent: +1.5 (quirks)]
     expected: FAIL
 
@@ -192,9 +177,6 @@
     expected:
       if os == "mac": FAIL
 
-  [padding: -1.5 (quirks)]
-    expected: FAIL
-
   [text-indent: -1.5 (quirks)]
     expected: FAIL