diff --git a/tests/qtest/boot-order-test.c b/tests/qtest/boot-order-test.c
index 4a6218a516..2f1c07221c 100644
--- a/tests/qtest/boot-order-test.c
+++ b/tests/qtest/boot-order-test.c
@@ -110,7 +110,7 @@ static void test_pc_boot_order(void)
 
 static uint64_t read_boot_order_pmac(QTestState *qts)
 {
-    QFWCFG *fw_cfg = mm_fw_cfg_init(qts, 0xf0000510);
+    g_autoptr(QFWCFG) fw_cfg = mm_fw_cfg_init(qts, 0xf0000510);
 
     return qfw_cfg_get_u16(fw_cfg, FW_CFG_BOOT_DEVICE);
 }
@@ -135,7 +135,7 @@ static void test_pmac_newworld_boot_order(void)
 
 static uint64_t read_boot_order_sun4m(QTestState *qts)
 {
-    QFWCFG *fw_cfg = mm_fw_cfg_init(qts, 0xd00000510ULL);
+    g_autoptr(QFWCFG) fw_cfg = mm_fw_cfg_init(qts, 0xd00000510ULL);
 
     return qfw_cfg_get_u16(fw_cfg, FW_CFG_BOOT_DEVICE);
 }
@@ -147,7 +147,7 @@ static void test_sun4m_boot_order(void)
 
 static uint64_t read_boot_order_sun4u(QTestState *qts)
 {
-    QFWCFG *fw_cfg = io_fw_cfg_init(qts, 0x510);
+    g_autoptr(QFWCFG) fw_cfg = io_fw_cfg_init(qts, 0x510);
 
     return qfw_cfg_get_u16(fw_cfg, FW_CFG_BOOT_DEVICE);
 }
diff --git a/tests/qtest/libqos/fw_cfg.h b/tests/qtest/libqos/fw_cfg.h
index 13325cc4ff..c6a7cf8cf0 100644
--- a/tests/qtest/libqos/fw_cfg.h
+++ b/tests/qtest/libqos/fw_cfg.h
@@ -49,4 +49,6 @@ static inline void pc_fw_cfg_uninit(QFWCFG *fw_cfg)
     io_fw_cfg_uninit(fw_cfg);
 }
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(QFWCFG, mm_fw_cfg_uninit)
+
 #endif