diff --git a/tests/qtest/virtio-iommu-test.c b/tests/qtest/virtio-iommu-test.c
index 47e68388a0..068e7a9e6c 100644
--- a/tests/qtest/virtio-iommu-test.c
+++ b/tests/qtest/virtio-iommu-test.c
@@ -31,11 +31,13 @@ static void pci_config(void *obj, void *data, QGuestAllocator *t_alloc)
     uint64_t input_range_end = qvirtio_config_readq(dev, 16);
     uint32_t domain_range_start = qvirtio_config_readl(dev, 24);
     uint32_t domain_range_end = qvirtio_config_readl(dev, 28);
+    uint8_t bypass = qvirtio_config_readb(dev, 36);
 
     g_assert_cmpint(input_range_start, ==, 0);
     g_assert_cmphex(input_range_end, ==, UINT64_MAX);
     g_assert_cmpint(domain_range_start, ==, 0);
     g_assert_cmpint(domain_range_end, ==, UINT32_MAX);
+    g_assert_cmpint(bypass, ==, 1);
 }
 
 static int read_tail_status(struct virtio_iommu_req_tail *buffer)