diff --git a/Tests/LibWeb/Text/expected/navigation/run-script-before-iframe-initial-navigation.txt b/Tests/LibWeb/Text/expected/navigation/run-script-before-iframe-initial-navigation.txt
new file mode 100644
index 0000000000..04485695e5
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/navigation/run-script-before-iframe-initial-navigation.txt
@@ -0,0 +1 @@
+    message from test iframe
diff --git a/Tests/LibWeb/Text/input/navigation/run-script-before-iframe-initial-navigation.html b/Tests/LibWeb/Text/input/navigation/run-script-before-iframe-initial-navigation.html
new file mode 100644
index 0000000000..9c1a8813f3
--- /dev/null
+++ b/Tests/LibWeb/Text/input/navigation/run-script-before-iframe-initial-navigation.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<script src="../include.js"></script>
+<body>
+    <!-- Other browsers seem to display the message below regardless of what src is (valid or not) -->
+    <iframe id="target" srcdoc="iframe content"></iframe>
+    <script>
+        asyncTest((done) => {
+            const script = target.contentDocument.createElement("script");
+            script.innerHTML = `parent.postMessage("message from test iframe", "*");`;
+            target.contentDocument.body.appendChild(script);
+            window.addEventListener("message", event => {
+                println(event.data);
+                done();
+            });
+        });
+    </script>
+</body>
diff --git a/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp b/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
index 22ff77cf23..0787e0abf8 100644
--- a/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
+++ b/Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
@@ -227,6 +227,8 @@ WebIDL::ExceptionOr<BrowsingContext::BrowsingContextAndDocument> BrowsingContext
 
     // is initial about:blank: true
     document->set_is_initial_about_blank(true);
+    // Spec issue: https://github.com/whatwg/html/issues/10261
+    document->set_ready_to_run_scripts();
 
     // about base URL: creatorBaseURL
     document->set_about_base_url(creator_base_url);
diff --git a/Userland/Libraries/LibWeb/HTML/NavigableContainer.cpp b/Userland/Libraries/LibWeb/HTML/NavigableContainer.cpp
index f850befa2d..38ed8e49f9 100644
--- a/Userland/Libraries/LibWeb/HTML/NavigableContainer.cpp
+++ b/Userland/Libraries/LibWeb/HTML/NavigableContainer.cpp
@@ -220,11 +220,7 @@ Optional<URL::URL> NavigableContainer::shared_attribute_processing_steps_for_ifr
     // 4. If url matches about:blank and initialInsertion is true, then perform the URL and history update steps given element's content navigable's active document and url.
     if (url_matches_about_blank(url) && initial_insertion) {
         auto& document = *m_content_navigable->active_document();
-
         perform_url_and_history_update_steps(document, url);
-
-        // Spec issue: https://github.com/whatwg/html/issues/10261
-        document.set_ready_to_run_scripts();
     }
 
     // 5. Return url.
