WebKit export of https://bugs.webkit.org/show_bug.cgi?id=251590 (#38330)
diff --git a/css/css-properties-values-api/registered-properties-inheritance.html b/css/css-properties-values-api/registered-properties-inheritance.html
index 614a72a..7c8c265 100644
--- a/css/css-properties-values-api/registered-properties-inheritance.html
+++ b/css/css-properties-values-api/registered-properties-inheritance.html
@@ -59,6 +59,13 @@
}, "Explicitly inheriting from a parent with no value results in initial value.");
test(function(){
+ CSS.registerProperty({name: '--initial-length-3', syntax: '<length>', initialValue: '0px', inherits: false});
+ outer.style = '--initial-length-3: 100px';
+ inner.style = '--initial-length-3: inherit';
+ assert_equals(getComputedStyle(inner).getPropertyValue('--initial-length-3'), '100px');
+}, "Explicitly inheriting from a parent with a value results in that value.");
+
+test(function(){
CSS.registerProperty({name: '--inherited-length-4', syntax: '<length>', initialValue: '0px', inherits: true});
outer.style = '--inherited-length-4: 42px';
inner.style = '--inherited-length-4: var(--undefined)';
