diff --git a/tests/qemu-iotests/051 b/tests/qemu-iotests/051
index a3deb1fcad..200660f977 100755
--- a/tests/qemu-iotests/051
+++ b/tests/qemu-iotests/051
@@ -191,6 +191,30 @@ case "$QEMU_DEFAULT_MACHINE" in
         ;;
 esac
 
+echo
+echo === Attach to node in non-default iothread ===
+echo
+
+case "$QEMU_DEFAULT_MACHINE" in
+    pc)
+        iothread="-drive file=$TEST_IMG,if=none,node-name=disk -object iothread,id=thread0 -device virtio-scsi,iothread=thread0,id=virtio-scsi0 -device scsi-hd,bus=virtio-scsi0.0,drive=disk,share-rw=on"
+
+        # Can't add a device in the main thread while virtio-scsi0 uses the node
+        run_qemu $iothread -device ide-hd,drive=disk,share-rw=on
+        run_qemu $iothread -device virtio-blk-pci,drive=disk,share-rw=on
+        run_qemu $iothread -device lsi53c895a,id=lsi0 -device scsi-hd,bus=lsi0.0,drive=disk,share-rw=on
+        run_qemu $iothread -device virtio-scsi,id=virtio-scsi1 -device scsi-hd,bus=virtio-scsi1.0,drive=disk,share-rw=on
+
+        # virtio-blk enables the iothread only when the driver initialises the
+        # device, so a second virtio-blk device can't be added even with the
+        # same iothread. virtio-scsi allows this.
+        run_qemu $iothread -device virtio-blk-pci,drive=disk,iohtread=iothread0,share-rw=on
+        run_qemu $iothread -device virtio-scsi,id=virtio-scsi1,iothread=thread0 -device scsi-hd,bus=virtio-scsi1.0,drive=disk,share-rw=on
+        ;;
+     *)
+        ;;
+esac
+
 echo
 echo === Read-only ===
 echo
diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
index 9f1cf22608..8993835b94 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -137,6 +137,9 @@ QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) QEMU_PROG: -drive if=virtio: Device needs media, but drive is empty
 
 
+=== Attach to node in non-default iothread ===
+
+
 === Read-only ===
 
 Testing: -drive file=TEST_DIR/t.qcow2,if=virtio,readonly=on
diff --git a/tests/qemu-iotests/051.pc.out b/tests/qemu-iotests/051.pc.out
index c4743cc31c..2d811c166c 100644
--- a/tests/qemu-iotests/051.pc.out
+++ b/tests/qemu-iotests/051.pc.out
@@ -173,6 +173,33 @@ QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) QEMU_PROG: -device scsi-hd,drive=disk: Device needs media, but drive is empty
 
 
+=== Attach to node in non-default iothread ===
+
+Testing: -drive file=TEST_DIR/t.qcow2,if=none,node-name=disk -object iothread,id=thread0 -device virtio-scsi,iothread=thread0,id=virtio-scsi0 -device scsi-hd,bus=virtio-scsi0.0,drive=disk,share-rw=on -device ide-hd,drive=disk,share-rw=on
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) QEMU_PROG: -device ide-hd,drive=disk,share-rw=on: Cannot change iothread of active block backend
+
+Testing: -drive file=TEST_DIR/t.qcow2,if=none,node-name=disk -object iothread,id=thread0 -device virtio-scsi,iothread=thread0,id=virtio-scsi0 -device scsi-hd,bus=virtio-scsi0.0,drive=disk,share-rw=on -device virtio-blk-pci,drive=disk,share-rw=on
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) QEMU_PROG: -device virtio-blk-pci,drive=disk,share-rw=on: Cannot change iothread of active block backend
+
+Testing: -drive file=TEST_DIR/t.qcow2,if=none,node-name=disk -object iothread,id=thread0 -device virtio-scsi,iothread=thread0,id=virtio-scsi0 -device scsi-hd,bus=virtio-scsi0.0,drive=disk,share-rw=on -device lsi53c895a,id=lsi0 -device scsi-hd,bus=lsi0.0,drive=disk,share-rw=on
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) QEMU_PROG: -device scsi-hd,bus=lsi0.0,drive=disk,share-rw=on: HBA does not support iothreads
+
+Testing: -drive file=TEST_DIR/t.qcow2,if=none,node-name=disk -object iothread,id=thread0 -device virtio-scsi,iothread=thread0,id=virtio-scsi0 -device scsi-hd,bus=virtio-scsi0.0,drive=disk,share-rw=on -device virtio-scsi,id=virtio-scsi1 -device scsi-hd,bus=virtio-scsi1.0,drive=disk,share-rw=on
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) QEMU_PROG: -device scsi-hd,bus=virtio-scsi1.0,drive=disk,share-rw=on: Cannot change iothread of active block backend
+
+Testing: -drive file=TEST_DIR/t.qcow2,if=none,node-name=disk -object iothread,id=thread0 -device virtio-scsi,iothread=thread0,id=virtio-scsi0 -device scsi-hd,bus=virtio-scsi0.0,drive=disk,share-rw=on -device virtio-blk-pci,drive=disk,iohtread=iothread0,share-rw=on
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) QEMU_PROG: -device virtio-blk-pci,drive=disk,iohtread=iothread0,share-rw=on: Cannot change iothread of active block backend
+
+Testing: -drive file=TEST_DIR/t.qcow2,if=none,node-name=disk -object iothread,id=thread0 -device virtio-scsi,iothread=thread0,id=virtio-scsi0 -device scsi-hd,bus=virtio-scsi0.0,drive=disk,share-rw=on -device virtio-scsi,id=virtio-scsi1,iothread=thread0 -device scsi-hd,bus=virtio-scsi1.0,drive=disk,share-rw=on
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) quit
+
+
 === Read-only ===
 
 Testing: -drive file=TEST_DIR/t.qcow2,if=floppy,readonly=on