diff --git a/tests/disk.sh b/tests/disk.sh
index e8edb7c..4a5c101 100755
--- a/tests/disk.sh
+++ b/tests/disk.sh
@@ -7,6 +7,6 @@ qemu-system-x86_64 \
     -m 4G \
     -boot d \
     -cdrom Win*.iso \
-    -drive file=/dev/sda,format=raw,cache=none,if=virtio \
+    -drive file=/dev/sdb,format=raw,cache=none,if=virtio \
     -vga virtio \
     -monitor stdio