diff --git a/Libraries/LibWeb/DOM/Document.cpp b/Libraries/LibWeb/DOM/Document.cpp
index b4c61fb3491..7e4d61d3182 100644
--- a/Libraries/LibWeb/DOM/Document.cpp
+++ b/Libraries/LibWeb/DOM/Document.cpp
@@ -4511,6 +4511,11 @@ GC::Ref<DOM::Document> Document::appropriate_template_contents_owner_document()
             if (document_type() == Type::HTML)
                 new_document->set_document_type(Type::HTML);
 
+            // AD-HOC: Copy over the "allow declarative shadow roots" flag, otherwise no elements inside templates will
+            //         be able to have declarative shadow roots.
+            // Spec issue: https://github.com/whatwg/html/issues/11955
+            new_document->set_allow_declarative_shadow_roots(allow_declarative_shadow_roots());
+
             // 3. Set doc's associated inert template document to new doc.
             m_associated_inert_template_document = new_document;
         }
diff --git a/Tests/LibWeb/Text/expected/wpt-import/shadow-dom/attachShadow-with-ShadowRoot.txt b/Tests/LibWeb/Text/expected/wpt-import/shadow-dom/attachShadow-with-ShadowRoot.txt
index 5fdd2350d47..2c70fb40664 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/shadow-dom/attachShadow-with-ShadowRoot.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/shadow-dom/attachShadow-with-ShadowRoot.txt
@@ -2,7 +2,6 @@ Harness status: OK
 
 Found 2 tests
 
-1 Pass
-1 Fail
+2 Pass
 Pass	can use ShadowRoot as options for attachShadow
-Fail	can use ShadowRoot in document fragment as options for attachShadow
\ No newline at end of file
+Pass	can use ShadowRoot in document fragment as options for attachShadow
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/shadow-dom/declarative/declarative-shadow-dom-basic.txt b/Tests/LibWeb/Text/expected/wpt-import/shadow-dom/declarative/declarative-shadow-dom-basic.txt
index d543fdf7b50..bb970d7b1bc 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/shadow-dom/declarative/declarative-shadow-dom-basic.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/shadow-dom/declarative/declarative-shadow-dom-basic.txt
@@ -2,8 +2,7 @@ Harness status: OK
 
 Found 22 tests
 
-18 Pass
-4 Fail
+22 Pass
 Pass	Declarative Shadow DOM: Basic test
 Pass	Declarative Shadow DOM: Feature detection
 Pass	Shadowrootmode reflection
@@ -19,10 +18,10 @@ Pass	Declarative Shadow DOM: Missing closing tag
 Pass	Declarative Shadow DOM: delegates focus attribute
 Pass	Declarative Shadow DOM: clonable attribute
 Pass	Declarative Shadow DOM: Multiple roots
-Fail	Declarative Shadow DOM: template containing declarative shadow root (with shadowrootclonable)
-Fail	Declarative Shadow DOM: template containing (deeply nested) declarative shadow root
-Fail	Declarative Shadow DOM: template containing a template containing declarative shadow root
-Fail	Declarative Shadow DOM: template containing declarative shadow root and UA shadow root
+Pass	Declarative Shadow DOM: template containing declarative shadow root (with shadowrootclonable)
+Pass	Declarative Shadow DOM: template containing (deeply nested) declarative shadow root
+Pass	Declarative Shadow DOM: template containing a template containing declarative shadow root
+Pass	Declarative Shadow DOM: template containing declarative shadow root and UA shadow root
 Pass	Declarative Shadow DOM: template containing closed declarative shadow root and UA shadow root
 Pass	Declarative Shadow DOM: declarative shadow roots are not supported by the template element
 Pass	Declarative Shadow DOM: explicit test that exceptions are not thrown
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