diff --git a/nixos/modules/testing/test-instrumentation.nix b/nixos/modules/testing/test-instrumentation.nix
index 9e3bc780f5b4..2560c1b2daec 100644
--- a/nixos/modules/testing/test-instrumentation.nix
+++ b/nixos/modules/testing/test-instrumentation.nix
@@ -97,6 +97,9 @@ let kernel = config.boot.kernelPackages.kernel; in
 
     networking.usePredictableInterfaceNames = false;
 
+    # Make it easy to log in as root when running the test interactively.
+    security.initialRootPassword = "";
+
   };
 
 }