diff --git a/tests/vmgenid-test.c b/tests/vmgenid-test.c
index c9c4f8c..84449ce 100644
--- a/tests/vmgenid-test.c
+++ b/tests/vmgenid-test.c
@@ -95,17 +95,17 @@
     return guid_offset;
 }
 
-static void read_guid_from_memory(QemuUUID *guid)
+static void read_guid_from_memory(QTestState *qts, QemuUUID *guid)
 {
     uint32_t vmgenid_addr;
     int i;
 
-    vmgenid_addr = acpi_find_vgia(global_qtest);
+    vmgenid_addr = acpi_find_vgia(qts);
     g_assert(vmgenid_addr);
 
     /* Read the GUID directly from guest memory */
     for (i = 0; i < 16; i++) {
-        guid->data[i] = readb(vmgenid_addr + i);
+        guid->data[i] = qtest_readb(qts, vmgenid_addr + i);
     }
     /* The GUID is in little-endian format in the guest, while QEMU
      * uses big-endian.  Swap after reading.
@@ -113,12 +113,12 @@
     qemu_uuid_bswap(guid);
 }
 
-static void read_guid_from_monitor(QemuUUID *guid)
+static void read_guid_from_monitor(QTestState *qts, QemuUUID *guid)
 {
     QDict *rsp, *rsp_ret;
     const char *guid_str;
 
-    rsp = qmp("{ 'execute': 'query-vm-generation-id' }");
+    rsp = qtest_qmp(qts, "{ 'execute': 'query-vm-generation-id' }");
     if (qdict_haskey(rsp, "return")) {
         rsp_ret = qdict_get_qdict(rsp, "return");
         g_assert(qdict_haskey(rsp_ret, "guid"));
@@ -139,45 +139,48 @@
 static void vmgenid_set_guid_test(void)
 {
     QemuUUID expected, measured;
+    QTestState *qts;
 
     g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
 
-    global_qtest = qtest_initf(GUID_CMD(VGID_GUID));
+    qts = qtest_initf(GUID_CMD(VGID_GUID));
 
     /* Read the GUID from accessing guest memory */
-    read_guid_from_memory(&measured);
+    read_guid_from_memory(qts, &measured);
     g_assert(memcmp(measured.data, expected.data, sizeof(measured.data)) == 0);
 
-    qtest_quit(global_qtest);
+    qtest_quit(qts);
 }
 
 static void vmgenid_set_guid_auto_test(void)
 {
     QemuUUID measured;
+    QTestState *qts;
 
-    global_qtest = qtest_initf(GUID_CMD("auto"));
+    qts = qtest_initf(GUID_CMD("auto"));
 
-    read_guid_from_memory(&measured);
+    read_guid_from_memory(qts, &measured);
 
     /* Just check that the GUID is non-null */
     g_assert(!qemu_uuid_is_null(&measured));
 
-    qtest_quit(global_qtest);
+    qtest_quit(qts);
 }
 
 static void vmgenid_query_monitor_test(void)
 {
     QemuUUID expected, measured;
+    QTestState *qts;
 
     g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
 
-    global_qtest = qtest_initf(GUID_CMD(VGID_GUID));
+    qts = qtest_initf(GUID_CMD(VGID_GUID));
 
     /* Read the GUID via the monitor */
-    read_guid_from_monitor(&measured);
+    read_guid_from_monitor(qts, &measured);
     g_assert(memcmp(measured.data, expected.data, sizeof(measured.data)) == 0);
 
-    qtest_quit(global_qtest);
+    qtest_quit(qts);
 }
 
 int main(int argc, char **argv)