diff --git a/Tests/LibWeb/Text/expected/HTML/HTMLFormElement-action.txt b/Tests/LibWeb/Text/expected/HTML/HTMLFormElement-action.txt
new file mode 100644
index 00000000000..87afb8e7e02
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/HTML/HTMLFormElement-action.txt
@@ -0,0 +1,3 @@
+ form.action initial value: http://www.example.com/
+Final segment of form.action after setting to the empty string: HTMLFormElement-action.html
+Final segment of form.action after setting to "../test.html": test.html
diff --git a/Tests/LibWeb/Text/input/HTML/HTMLFormElement-action.html b/Tests/LibWeb/Text/input/HTML/HTMLFormElement-action.html
new file mode 100644
index 00000000000..da585416486
--- /dev/null
+++ b/Tests/LibWeb/Text/input/HTML/HTMLFormElement-action.html
@@ -0,0 +1,14 @@
+
+
+
+
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
index e1f92cd17bf..5adcb87fc52 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp
@@ -604,12 +604,12 @@ String HTMLFormElement::action() const
// The action IDL attribute must reflect the content attribute of the same name, except that on getting, when the
// content attribute is missing or its value is the empty string, the element's node document's URL must be returned
// instead.
- if (auto maybe_action = attribute(AttributeNames::action);
- maybe_action.has_value() && !maybe_action.value().is_empty()) {
- return maybe_action.value();
+ auto form_action_attribute = attribute(AttributeNames::action);
+ if (!form_action_attribute.has_value() || form_action_attribute.value().is_empty()) {
+ return document().url_string();
}
- return MUST(document().url().to_string());
+ return MUST(document().base_url().complete_url(form_action_attribute.value()).to_string());
}
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-fs-action