diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-nesting/cssom.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-nesting/cssom.txt
index 84299b8c6e1..d18a98339e2 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-nesting/cssom.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-nesting/cssom.txt
@@ -6,7 +6,8 @@ Rerun
 
 Found 13 tests
 
-13 Fail
+1 Pass
+12 Fail
 Details
 Result	Test Name	MessageFail	CSSStyleRule is a CSSGroupingRule	
 Fail	Simple CSSOM manipulation of subrules	
@@ -20,4 +21,4 @@ Fail	Simple CSSOM manipulation of subrules 7
 Fail	Simple CSSOM manipulation of subrules 8	
 Fail	Simple CSSOM manipulation of subrules 9	
 Fail	Simple CSSOM manipulation of subrules 10	
-Fail	Mutating the selectorText of outer rule invalidates inner rules	
\ No newline at end of file
+Pass	Mutating the selectorText of outer rule invalidates inner rules	
\ No newline at end of file
diff --git a/Userland/Libraries/LibWeb/CSS/CSSGroupingRule.cpp b/Userland/Libraries/LibWeb/CSS/CSSGroupingRule.cpp
index 2db642ac56a..1a8ad358753 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSGroupingRule.cpp
+++ b/Userland/Libraries/LibWeb/CSS/CSSGroupingRule.cpp
@@ -34,6 +34,13 @@ void CSSGroupingRule::visit_edges(Cell::Visitor& visitor)
     visitor.visit(m_rules);
 }
 
+void CSSGroupingRule::clear_caches()
+{
+    Base::clear_caches();
+    for (auto& rule : *m_rules)
+        rule->clear_caches();
+}
+
 WebIDL::ExceptionOr<u32> CSSGroupingRule::insert_rule(StringView rule, u32 index)
 {
     TRY(m_rules->insert_a_css_rule(rule, index));
diff --git a/Userland/Libraries/LibWeb/CSS/CSSGroupingRule.h b/Userland/Libraries/LibWeb/CSS/CSSGroupingRule.h
index 5a00014733d..20dcc9987ba 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSGroupingRule.h
+++ b/Userland/Libraries/LibWeb/CSS/CSSGroupingRule.h
@@ -35,6 +35,7 @@ protected:
 
     virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
+    virtual void clear_caches() override;
 
 private:
     JS::NonnullGCPtr<CSSRuleList> m_rules;
diff --git a/Userland/Libraries/LibWeb/CSS/CSSRule.h b/Userland/Libraries/LibWeb/CSS/CSSRule.h
index 15a491037af..caded862ba9 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSRule.h
+++ b/Userland/Libraries/LibWeb/CSS/CSSRule.h
@@ -58,13 +58,13 @@ public:
     // https://drafts.csswg.org/cssom-1/#serialize-a-css-rule
     virtual String serialized() const = 0;
 
+    virtual void clear_caches();
+
 protected:
     explicit CSSRule(JS::Realm&, Type);
 
     virtual void visit_edges(Cell::Visitor&) override;
 
-    virtual void clear_caches();
-
     [[nodiscard]] FlyString const& parent_layer_internal_qualified_name() const
     {
         if (!m_cached_layer_name.has_value())