diff --git a/servo/components/style/properties/properties.mako.rs b/servo/components/style/properties/properties.mako.rs
index b733b68411ae..ef9eb3c12f7a 100644
--- a/servo/components/style/properties/properties.mako.rs
+++ b/servo/components/style/properties/properties.mako.rs
@@ -169,6 +169,8 @@ pub mod shorthands {
                 continue;
             if not p.enabled_in_content() and not p.experimental(engine):
                 continue;
+            if "Style" not in p.rule_types_allowed_names():
+                continue;
             if p.logical:
                 logical_longhands.append(p.name)
             else:
diff --git a/testing/web-platform/meta/css/cssom/cssom-getPropertyValue-common-checks.html.ini b/testing/web-platform/meta/css/cssom/cssom-getPropertyValue-common-checks.html.ini
deleted file mode 100644
index a9755ac45572..000000000000
--- a/testing/web-platform/meta/css/cssom/cssom-getPropertyValue-common-checks.html.ini
+++ /dev/null
@@ -1,9 +0,0 @@
-[cssom-getPropertyValue-common-checks.html]
-  [All shorthands can serialize their longhands set to 'initial']
-    expected: FAIL
-
-  [Can't serialize shorthand when longhands are set to different css-wide keywords]
-    expected: FAIL
-
-  [Can't serialize shorthand when longhands have different priority]
-    expected: FAIL
diff --git a/testing/web-platform/tests/css/cssom/cssom-getPropertyValue-common-checks.html b/testing/web-platform/tests/css/cssom/cssom-getPropertyValue-common-checks.html
index 29ca39a88a65..27d802cd3df6 100644
--- a/testing/web-platform/tests/css/cssom/cssom-getPropertyValue-common-checks.html
+++ b/testing/web-platform/tests/css/cssom/cssom-getPropertyValue-common-checks.html
@@ -72,13 +72,11 @@ test(function() {
     const result = computedStyle.getPropertyValue(property);
     if (CSS.supports(property, result)) {
       initialValues.set(property, result);
-    } else if (property === "all") {
-      bad.push("all");
-    } else {
+    } else if (property !== "all") {
       bad.push([property, result]);
     }
   }
-  assert_array_equals(bad, ["all"]);
+  assert_array_equals(bad, []);
 }, "All properties (except 'all') can serialize their initial value (computed)");
 
 test(function() {
@@ -87,7 +85,7 @@ test(function() {
     style.cssText = "";
     style.setProperty(property, value);
     const result = style.getPropertyValue(property);
-    if (!CSS.supports(property, result)) {
+    if (!CSS.supports(property, result) && property !== "all") {
       bad.push([property, value, result]);
     }
   }
@@ -121,12 +119,12 @@ test(function() {
       style.setProperty(longhand, initialValues.get(longhand));
     }
     const result = style.getPropertyValue(shorthand);
-    if (!CSS.supports(shorthand, result)) {
+    if (!CSS.supports(shorthand, result) && shorthand !== "all") {
       bad.push([shorthand, result]);
     }
   }
   assert_array_equals(bad, []);
-}, "All shorthands can serialize their longhands set to their initial value");
+}, "All shorthands (except 'all') can serialize their longhands set to their initial value");
 
 test(function() {
   const bad = [];