diff --git a/tests/qtest/libqos/virtio-pci-modern.c b/tests/qtest/libqos/virtio-pci-modern.c
index 18d118866f..4e67fcbd5d 100644
--- a/tests/qtest/libqos/virtio-pci-modern.c
+++ b/tests/qtest/libqos/virtio-pci-modern.c
@@ -173,13 +173,11 @@ static bool get_config_isr_status(QVirtioDevice *d)
 
 static void wait_config_isr_status(QVirtioDevice *d, gint64 timeout_us)
 {
-    QVirtioPCIDevice *dev = container_of(d, QVirtioPCIDevice, vdev);
     gint64 start_time = g_get_monotonic_time();
 
-    do {
+    while (!get_config_isr_status(d)) {
         g_assert(g_get_monotonic_time() - start_time <= timeout_us);
-        qtest_clock_step(dev->pdev->bus->qts, 100);
-    } while (!get_config_isr_status(d));
+    }
 }
 
 static void queue_select(QVirtioDevice *d, uint16_t index)
diff --git a/tests/qtest/libqos/virtio-pci.c b/tests/qtest/libqos/virtio-pci.c
index 485b8f6b7e..002bf8b8c2 100644
--- a/tests/qtest/libqos/virtio-pci.c
+++ b/tests/qtest/libqos/virtio-pci.c
@@ -171,13 +171,11 @@ static bool qvirtio_pci_get_config_isr_status(QVirtioDevice *d)
 static void qvirtio_pci_wait_config_isr_status(QVirtioDevice *d,
                                                gint64 timeout_us)
 {
-    QVirtioPCIDevice *dev = container_of(d, QVirtioPCIDevice, vdev);
     gint64 start_time = g_get_monotonic_time();
 
-    do {
+    while (!qvirtio_pci_get_config_isr_status(d)) {
         g_assert(g_get_monotonic_time() - start_time <= timeout_us);
-        qtest_clock_step(dev->pdev->bus->qts, 100);
-    } while (!qvirtio_pci_get_config_isr_status(d));
+    }
 }
 
 static void qvirtio_pci_queue_select(QVirtioDevice *d, uint16_t index)