diff --git a/tests/mocks/jsonchema_defs.json b/tests/mocks/jsonchema_defs.json
new file mode 100644
index 0000000..ef79c1a
--- /dev/null
+++ b/tests/mocks/jsonchema_defs.json
@@ -0,0 +1,23 @@
+{
+  "$id": "https://example.com/schemas/customer",
+  "type": "object",
+  "properties": {
+    "first_name": {
+      "$ref": "#/$defs/name"
+    },
+    "last_name": {
+      "$ref": "#/$defs/name"
+    }
+  },
+  "required": [
+    "first_name",
+    "last_name",
+    "shipping_address",
+    "billing_address"
+  ],
+  "$defs": {
+    "name": {
+      "type": "string"
+    }
+  }
+}
diff --git a/tests/smoke.t b/tests/smoke.t
index f7eb263..a73a6c8 100644
--- a/tests/smoke.t
+++ b/tests/smoke.t
@@ -43,3 +43,14 @@ Generate ATD out of OpenAPI doc with -f attribute
   type product = {
     ?productId: int option;
   }
+
+Generate ATD out of JSON Schema that contains defs
+  $ jsonschema2atd --format=jsonschema ./mocks/jsonchema_defs.json
+  (* Generated by jsonschema2atd *)
+  type json <ocaml module="Yojson.Basic" t="t"> = abstract
+  type int64 = int <ocaml repr="int64">
+  
+  type root = {
+    first_name: name;
+    last_name: name;
+  }