diff --git a/Libraries/LibWeb/HTML/FormAssociatedElement.cpp b/Libraries/LibWeb/HTML/FormAssociatedElement.cpp
index 816367937a2..b09c8c9ab58 100644
--- a/Libraries/LibWeb/HTML/FormAssociatedElement.cpp
+++ b/Libraries/LibWeb/HTML/FormAssociatedElement.cpp
@@ -244,6 +244,13 @@ bool FormAssociatedElement::report_validity()
     return report_validity_steps();
 }
 
+// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-checkvalidity
+bool FormAssociatedElement::check_validity()
+{
+    // The checkValidity() method, when invoked, must run the check validity steps on this element.
+    return check_validity_steps();
+}
+
 // https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#check-validity-steps
 bool FormAssociatedElement::check_validity_steps()
 {
diff --git a/Libraries/LibWeb/HTML/FormAssociatedElement.h b/Libraries/LibWeb/HTML/FormAssociatedElement.h
index 1e8c647d425..17e70cf8beb 100644
--- a/Libraries/LibWeb/HTML/FormAssociatedElement.h
+++ b/Libraries/LibWeb/HTML/FormAssociatedElement.h
@@ -143,6 +143,9 @@ public:
     // https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-reportvalidity
     bool report_validity();
 
+    // https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-checkvalidity
+    bool check_validity();
+
     // https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-validity
     GC::Ref<ValidityState const> validity() const;
 
diff --git a/Libraries/LibWeb/HTML/HTMLButtonElement.idl b/Libraries/LibWeb/HTML/HTMLButtonElement.idl
index c23b4152f58..b03dd132da5 100644
--- a/Libraries/LibWeb/HTML/HTMLButtonElement.idl
+++ b/Libraries/LibWeb/HTML/HTMLButtonElement.idl
@@ -31,7 +31,7 @@ interface HTMLButtonElement : HTMLElement {
     readonly attribute boolean willValidate;
     readonly attribute ValidityState validity;
     [FIXME] readonly attribute DOMString validationMessage;
-    [FIXME] boolean checkValidity();
+    boolean checkValidity();
     boolean reportValidity();
     undefined setCustomValidity(DOMString error);
 
diff --git a/Libraries/LibWeb/HTML/HTMLFieldSetElement.idl b/Libraries/LibWeb/HTML/HTMLFieldSetElement.idl
index 1e9575112ac..594f07e1fbc 100644
--- a/Libraries/LibWeb/HTML/HTMLFieldSetElement.idl
+++ b/Libraries/LibWeb/HTML/HTMLFieldSetElement.idl
@@ -17,7 +17,7 @@ interface HTMLFieldSetElement : HTMLElement {
     readonly attribute boolean willValidate;
     [FIXME, SameObject] readonly attribute ValidityState validity;
     [FIXME] readonly attribute DOMString validationMessage;
-    [FIXME] boolean checkValidity();
+    boolean checkValidity();
     boolean reportValidity();
     undefined setCustomValidity(DOMString error);
 };
diff --git a/Libraries/LibWeb/HTML/HTMLInputElement.cpp b/Libraries/LibWeb/HTML/HTMLInputElement.cpp
index 4827c284430..844db532acc 100644
--- a/Libraries/LibWeb/HTML/HTMLInputElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLInputElement.cpp
@@ -2920,12 +2920,6 @@ bool HTMLInputElement::will_validate()
     return is_candidate_for_constraint_validation();
 }
 
-// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-checkvalidity
-WebIDL::ExceptionOr<bool> HTMLInputElement::check_validity()
-{
-    return check_validity_steps();
-}
-
 Optional<ARIA::Role> HTMLInputElement::default_role() const
 {
     // http://wpt.live/html-aam/roles-dynamic-switch.tentative.window.html "Disconnected <input type=checkbox switch>"
diff --git a/Libraries/LibWeb/HTML/HTMLInputElement.h b/Libraries/LibWeb/HTML/HTMLInputElement.h
index 39e3cd0e4a4..8f05b911e6f 100644
--- a/Libraries/LibWeb/HTML/HTMLInputElement.h
+++ b/Libraries/LibWeb/HTML/HTMLInputElement.h
@@ -160,7 +160,6 @@ public:
     WebIDL::ExceptionOr<void> step_down(WebIDL::Long n = 1);
 
     bool will_validate();
-    WebIDL::ExceptionOr<bool> check_validity();
 
     WebIDL::ExceptionOr<void> show_picker();
 
diff --git a/Libraries/LibWeb/HTML/HTMLObjectElement.idl b/Libraries/LibWeb/HTML/HTMLObjectElement.idl
index 894575a88d3..1ce1876a4d3 100644
--- a/Libraries/LibWeb/HTML/HTMLObjectElement.idl
+++ b/Libraries/LibWeb/HTML/HTMLObjectElement.idl
@@ -21,7 +21,7 @@ interface HTMLObjectElement : HTMLElement {
     readonly attribute boolean willValidate;
     readonly attribute ValidityState validity;
     [FIXME] readonly attribute DOMString validationMessage;
-    [FIXME] boolean checkValidity();
+    boolean checkValidity();
     boolean reportValidity();
     undefined setCustomValidity(DOMString error);
 
diff --git a/Libraries/LibWeb/HTML/HTMLOutputElement.idl b/Libraries/LibWeb/HTML/HTMLOutputElement.idl
index e23a774a579..1d49e96192d 100644
--- a/Libraries/LibWeb/HTML/HTMLOutputElement.idl
+++ b/Libraries/LibWeb/HTML/HTMLOutputElement.idl
@@ -18,7 +18,7 @@ interface HTMLOutputElement : HTMLElement {
     readonly attribute boolean willValidate;
     readonly attribute ValidityState validity;
     [FIXME] readonly attribute DOMString validationMessage;
-    [FIXME] boolean checkValidity();
+    boolean checkValidity();
     boolean reportValidity();
     undefined setCustomValidity(DOMString error);
 
diff --git a/Libraries/LibWeb/HTML/HTMLSelectElement.cpp b/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
index 1179839a7bd..b99c49009d1 100644
--- a/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLSelectElement.cpp
@@ -698,12 +698,6 @@ bool HTMLSelectElement::will_validate()
     return is_candidate_for_constraint_validation();
 }
 
-// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-checkvalidity
-bool HTMLSelectElement::check_validity()
-{
-    return check_validity_steps();
-}
-
 bool HTMLSelectElement::is_focusable() const
 {
     return enabled();
diff --git a/Libraries/LibWeb/HTML/HTMLSelectElement.h b/Libraries/LibWeb/HTML/HTMLSelectElement.h
index d50250788d5..26834c9e84b 100644
--- a/Libraries/LibWeb/HTML/HTMLSelectElement.h
+++ b/Libraries/LibWeb/HTML/HTMLSelectElement.h
@@ -63,7 +63,6 @@ public:
     Vector<GC::Root<HTMLOptionElement>> list_of_options() const;
 
     bool will_validate();
-    bool check_validity();
 
     // ^EventTarget
     // https://html.spec.whatwg.org/multipage/interaction.html#the-tabindex-attribute:the-select-element
diff --git a/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp b/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
index 6e1a7e573b7..53afd620c9f 100644
--- a/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLTextAreaElement.cpp
@@ -239,12 +239,6 @@ bool HTMLTextAreaElement::will_validate()
     return is_candidate_for_constraint_validation();
 }
 
-// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-checkvalidity
-bool HTMLTextAreaElement::check_validity()
-{
-    return check_validity_steps();
-}
-
 // https://html.spec.whatwg.org/multipage/form-elements.html#dom-textarea-maxlength
 WebIDL::Long HTMLTextAreaElement::max_length() const
 {
diff --git a/Libraries/LibWeb/HTML/HTMLTextAreaElement.h b/Libraries/LibWeb/HTML/HTMLTextAreaElement.h
index a79cfeb4583..6a8030a14f1 100644
--- a/Libraries/LibWeb/HTML/HTMLTextAreaElement.h
+++ b/Libraries/LibWeb/HTML/HTMLTextAreaElement.h
@@ -99,7 +99,6 @@ public:
     u32 text_length() const;
 
     bool will_validate();
-    bool check_validity();
 
     WebIDL::Long max_length() const;
     WebIDL::ExceptionOr<void> set_max_length(WebIDL::Long);