diff --git a/lib/test-driver/Machine.pm b/lib/test-driver/Machine.pm
index 069d60261a1a..43463eb7134e 100644
--- a/lib/test-driver/Machine.pm
+++ b/lib/test-driver/Machine.pm
@@ -25,7 +25,7 @@ sub new {
         $startCommand =
             "qemu-system-x86_64 -m 384 -no-kvm-irqchip " .
             "-net nic,model=virtio -net user \$QEMU_OPTS ";
-        $startCommand .= "-drive file=" . Cwd::abs_path($args->{hda}) . ",if=virtio,boot=on "
+        $startCommand .= "-drive file=" . Cwd::abs_path($args->{hda}) . ",if=virtio,boot=on,werror=report "
             if defined $args->{hda};
         $startCommand .= "-cdrom $args->{cdrom} "
             if defined $args->{cdrom};
diff --git a/modules/virtualisation/qemu-vm.nix b/modules/virtualisation/qemu-vm.nix
index 09764c09b909..a17e167cb46a 100644
--- a/modules/virtualisation/qemu-vm.nix
+++ b/modules/virtualisation/qemu-vm.nix
@@ -86,7 +86,7 @@ let
       exec ${pkgs.qemu_kvm}/bin/qemu-system-x86_64 -m ${toString config.virtualisation.memorySize} \
           -no-kvm-irqchip \
           -net nic,model=virtio -net user -smb / \
-          -drive file=$NIX_DISK_IMAGE,if=virtio,boot=on \
+          -drive file=$NIX_DISK_IMAGE,if=virtio,boot=on,werror=report \
           -kernel ${config.system.build.toplevel}/kernel \
           -initrd ${config.system.build.toplevel}/initrd \
           ${qemuGraphics} \