diff --git a/nixos/lib/test-driver/test_driver/machine.py b/nixos/lib/test-driver/test_driver/machine.py
index a362e99f98ed..1a97cedb2e81 100644
--- a/nixos/lib/test-driver/test_driver/machine.py
+++ b/nixos/lib/test-driver/test_driver/machine.py
@@ -369,8 +369,8 @@ class Machine:
     @staticmethod
     def create_startcommand(args: Dict[str, str]) -> StartCommand:
         rootlog.warning(
-            "Using legacy create_startcommand(),"
-            "please use proper nix test vm instrumentation, instead"
+            "Using legacy create_startcommand(), "
+            "please use proper nix test vm instrumentation, instead "
             "to generate the appropriate nixos test vm qemu startup script"
         )
         hda = None