diff --git a/nixos/modules/testing/test-instrumentation.nix b/nixos/modules/testing/test-instrumentation.nix
index 0f551dcbd63b..050c817e8718 100644
--- a/nixos/modules/testing/test-instrumentation.nix
+++ b/nixos/modules/testing/test-instrumentation.nix
@@ -90,6 +90,7 @@ in
         contents."/etc/systemd/journald.conf".text = ''
           [Journal]
           ForwardToConsole=yes
+          TTYPath=/dev/${qemu-common.qemuSerialDevice}
           MaxLevelConsole=debug
         '';