diff --git a/crates/js-sys/src/lib.rs b/crates/js-sys/src/lib.rs
index bf4df3c7..852d49f1 100644
--- a/crates/js-sys/src/lib.rs
+++ b/crates/js-sys/src/lib.rs
@@ -2886,7 +2886,7 @@ extern "C" {
 // JsString
 #[wasm_bindgen]
 extern "C" {
-    #[wasm_bindgen(js_name = String)]
+    #[wasm_bindgen(js_name = String, extends = Object)]
     #[derive(Clone)]
     pub type JsString;
 
diff --git a/crates/js-sys/tests/wasm/JsString.js b/crates/js-sys/tests/wasm/JsString.js
new file mode 100644
index 00000000..04a64a9a
--- /dev/null
+++ b/crates/js-sys/tests/wasm/JsString.js
@@ -0,0 +1 @@
+exports.new_string_object = () => new String("hi");
\ No newline at end of file
diff --git a/crates/js-sys/tests/wasm/JsString.rs b/crates/js-sys/tests/wasm/JsString.rs
index 4b276ba3..66fc5771 100644
--- a/crates/js-sys/tests/wasm/JsString.rs
+++ b/crates/js-sys/tests/wasm/JsString.rs
@@ -1,7 +1,21 @@
 use wasm_bindgen::JsValue;
+use wasm_bindgen::prelude::*;
+use wasm_bindgen::JsCast;
 use wasm_bindgen_test::*;
 use js_sys::*;
 
+#[wasm_bindgen(module = "tests/wasm/JsString.js")]
+extern {
+    fn new_string_object() -> JsValue;
+}
+
+#[wasm_bindgen_test]
+fn js_string_inheritance() {
+    let string = new_string_object();
+    assert!(string.is_instance_of::<JsString>());
+    assert!(string.is_instance_of::<Object>());
+}
+
 #[wasm_bindgen_test]
 fn length() {
     fn test(s: &str) {