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diff --git a/testing/web-platform/tests/html/semantics/forms/form-submission-0/FormDataEvent.window.js b/testing/web-platform/tests/html/semantics/forms/form-submission-0/FormDataEvent.window.js
new file mode 100644
index 0000000000..4890fd8623
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/forms/form-submission-0/FormDataEvent.window.js
@@ -0,0 +1,21 @@
+// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#the-formdataevent-interface
+
+test(() => {
+  let fd = new FormData();
+  assert_throws_js(TypeError, () => { FormDataEvent('', {formData:fd}) }, "Calling FormDataEvent constructor without 'new' must throw");
+  assert_throws_js(TypeError, () => { new FormDataEvent() }, '0 arguments');
+  assert_throws_js(TypeError, () => { new FormDataEvent('foo') }, '1 argument');
+  assert_throws_js(TypeError, () => { new FormDataEvent(fd, fd) }, '2 invalid arguments');
+  assert_throws_js(TypeError, () => { new FormDataEvent('foo', null) }, 'Null dictionary');
+  assert_throws_js(TypeError, () => { new FormDataEvent('foo', undefined) }, 'Undefined dictionary');
+  assert_throws_js(TypeError, () => { new FormDataEvent('foo', { formData: null }) }, 'Null formData');
+  assert_throws_js(TypeError, () => { new FormDataEvent('foo', { formData: undefined }) }, 'Undefined formData');
+  assert_throws_js(TypeError, () => { new FormDataEvent('foo', { formData: 'bar' }) }, 'Wrong type of formData');
+}, 'Failing FormDataEvent constructor');
+
+test(() => {
+  let fd = new FormData();
+  let event = new FormDataEvent('bar', { formData: fd, bubbles: true });
+  assert_equals(event.formData, fd);
+  assert_true(event.bubbles);
+}, 'Successful FormDataEvent constructor');