diff --git a/tests/test-qga.c b/tests/test-qga.c
index 30c9643..6b632e3 100644
--- a/tests/test-qga.c
+++ b/tests/test-qga.c
@@ -227,6 +227,25 @@
     qobject_unref(ret);
 }
 
+static void test_qga_invalid_id(gconstpointer fix)
+{
+    /*
+     * FIXME "id" is ignored; it should either be repeated in the
+     * reply, or rejected on input
+     */
+    const TestFixture *fixture = fix;
+    QDict *ret, *val;
+
+    ret = qmp_fd(fixture->fd, "{'execute': 'guest-ping', 'id': 1}");
+    g_assert_nonnull(ret);
+    qmp_assert_no_error(ret);
+
+    val = qdict_get_qdict(ret, "return");
+    g_assert(!qdict_haskey(val, "id"));
+
+    qobject_unref(ret);
+}
+
 static void test_qga_invalid_args(gconstpointer fix)
 {
     const TestFixture *fixture = fix;
@@ -934,6 +953,7 @@
     g_test_add_data_func("/qga/file-ops", &fix, test_qga_file_ops);
     g_test_add_data_func("/qga/file-write-read", &fix, test_qga_file_write_read);
     g_test_add_data_func("/qga/get-time", &fix, test_qga_get_time);
+    g_test_add_data_func("/qga/invalid-id", &fix, test_qga_invalid_id);
     g_test_add_data_func("/qga/invalid-cmd", &fix, test_qga_invalid_cmd);
     g_test_add_data_func("/qga/invalid-args", &fix, test_qga_invalid_args);
     g_test_add_data_func("/qga/fsfreeze-status", &fix,