diff --git a/tests/cpu-plug-test.c b/tests/cpu-plug-test.c
index 5f39ba0..ab3bf6d 100644
--- a/tests/cpu-plug-test.c
+++ b/tests/cpu-plug-test.c
@@ -88,8 +88,8 @@
         for (c = 0; c < td->cores; c++) {
             for (t = 0; t < td->threads; t++) {
                 char *id = g_strdup_printf("id-%i-%i-%i", s, c, t);
-                qtest_qmp_device_add(td->device_model, id, "'socket-id':'%i', "
-                                     "'core-id':'%i', 'thread-id':'%i'",
+                qtest_qmp_device_add(td->device_model, id, "'socket-id':%u, "
+                                     "'core-id':%u, 'thread-id':%u",
                                      s, c, t);
                 g_free(id);
             }
@@ -114,7 +114,7 @@
 
     for (c = td->cores; c < td->maxcpus / td->sockets / td->threads; c++) {
         char *id = g_strdup_printf("id-%i", c);
-        qtest_qmp_device_add(td->device_model, id, "'core-id':'%i'", c);
+        qtest_qmp_device_add(td->device_model, id, "'core-id':%u", c);
         g_free(id);
     }