diff --git a/tests/libqos/usb.c b/tests/libqos/usb.c
index 98408d93f3c10242d8b097ba4b9a2953f528348c..0cdfaecda7f418a6c824696fa9648b523e41351e 100644
--- a/tests/libqos/usb.c
+++ b/tests/libqos/usb.c
@@ -24,6 +24,11 @@ void qusb_pci_init_one(QPCIBus *pcibus, struct qhc *hc, uint32_t devfn, int bar)
     hc->bar = qpci_iomap(hc->dev, bar, NULL);
 }
 
+void uhci_deinit(struct qhc *hc)
+{
+    g_free(hc->dev);
+}
+
 void uhci_port_test(struct qhc *hc, int port, uint16_t expect)
 {
     uint16_t value = qpci_io_readw(hc->dev, hc->bar, 0x10 + 2 * port);
diff --git a/tests/libqos/usb.h b/tests/libqos/usb.h
index 423dcfd82fdfffd16f9e81caf5fb1125981e2f75..297cfc564dbea31fa166d5339bd6aaa46ae912b5 100644
--- a/tests/libqos/usb.h
+++ b/tests/libqos/usb.h
@@ -11,6 +11,7 @@ struct qhc {
 void qusb_pci_init_one(QPCIBus *pcibus, struct qhc *hc,
                        uint32_t devfn, int bar);
 void uhci_port_test(struct qhc *hc, int port, uint16_t expect);
+void uhci_deinit(struct qhc *hc);
 
 void usb_test_hotplug(const char *bus_name, const int port,
                       void (*port_check)(void));
diff --git a/tests/usb-hcd-ehci-test.c b/tests/usb-hcd-ehci-test.c
index fba84b4bee88cc430100a11b588397272aff65b2..944eb1c088b9b502d61d9443018f09d350abf81b 100644
--- a/tests/usb-hcd-ehci-test.c
+++ b/tests/usb-hcd-ehci-test.c
@@ -61,6 +61,15 @@ static void test_init(void)
     qusb_pci_init_one(pcibus, &ehci1, QPCI_DEVFN(0x1d, 7), 0);
 }
 
+static void test_deinit(void)
+{
+    uhci_deinit(&uhci1);
+    uhci_deinit(&uhci2);
+    uhci_deinit(&uhci3);
+    uhci_deinit(&ehci1);
+    qpci_free_pc(pcibus);
+}
+
 static void pci_uhci_port_1(void)
 {
     g_assert(pcibus != NULL);
@@ -161,6 +170,7 @@ int main(int argc, char **argv)
 
     test_init();
     ret = g_test_run();
+    test_deinit();
 
     qtest_end();
 
diff --git a/tests/usb-hcd-uhci-test.c b/tests/usb-hcd-uhci-test.c
index e956b9ccb7a6a2155d3a4badcb07828237a85f36..f25bae5e6c1e1f7b6837e4924e34c98420619112 100644
--- a/tests/usb-hcd-uhci-test.c
+++ b/tests/usb-hcd-uhci-test.c
@@ -28,6 +28,7 @@ static void test_port(int port)
     g_assert(port > 0);
     qusb_pci_init_one(qs->pcibus, &uhci, QPCI_DEVFN(0x1d, 0), 4);
     uhci_port_test(&uhci, port - 1, UHCI_PORT_CCS);
+    uhci_deinit(&uhci);
 }
 
 static void test_port_1(void)