diff --git a/nixos/tests/chromium.nix b/nixos/tests/chromium.nix
index d67acd075a13..1df4def66374 100644
--- a/nixos/tests/chromium.nix
+++ b/nixos/tests/chromium.nix
@@ -86,7 +86,7 @@ mapAttrs (channel: chromiumPkg: makeTest rec {
             options.append("--use-gl=swiftshader")
         # Launch the process:
         options.append("file://${startupHTML}")
-        machine.succeed(ru(f'ulimit -c unlimited; {binary} {shlex.join(options)} & disown'))
+        machine.succeed(ru(f'ulimit -c unlimited; {binary} {shlex.join(options)} >&2 & disown'))
         if binary.startswith("google-chrome"):
             # Need to click away the first window:
             machine.wait_for_text("Make Google Chrome the default browser")
diff --git a/nixos/tests/pantheon.nix b/nixos/tests/pantheon.nix
index 20aee2eb7a4c..aebf6b534476 100644
--- a/nixos/tests/pantheon.nix
+++ b/nixos/tests/pantheon.nix
@@ -51,7 +51,7 @@ import ./make-test-python.nix ({ pkgs, lib, ...} :
         machine.wait_for_window("plank")
 
     with subtest("Open elementary terminal"):
-        machine.execute("su - ${user.name} -c 'DISPLAY=:0 io.elementary.terminal &'")
+        machine.execute("su - ${user.name} -c 'DISPLAY=:0 io.elementary.terminal >&2 &'")
         machine.wait_for_window("io.elementary.terminal")
         machine.sleep(20)
         machine.screenshot("screen")
diff --git a/nixos/tests/service-runner.nix b/nixos/tests/service-runner.nix
index 58f46735f56d..79d96f739a6c 100644
--- a/nixos/tests/service-runner.nix
+++ b/nixos/tests/service-runner.nix
@@ -24,7 +24,7 @@ import ./make-test-python.nix ({ pkgs, ... }: {
         machine.succeed(
             """
             mkdir -p /run/nginx /var/log/nginx /var/cache/nginx
-            ${nodes.machine.config.systemd.services.nginx.runner} &
+            ${nodes.machine.config.systemd.services.nginx.runner} >&2 &
             echo $!>my-nginx.pid
             """
         )
diff --git a/nixos/tests/xfce.nix b/nixos/tests/xfce.nix
index 99e30342e593..148eccdbe308 100644
--- a/nixos/tests/xfce.nix
+++ b/nixos/tests/xfce.nix
@@ -38,7 +38,7 @@ import ./make-test-python.nix ({ pkgs, ...} : {
       # Check that logging in has given the user ownership of devices.
       machine.succeed("getfacl -p /dev/snd/timer | grep -q ${user.name}")
 
-      machine.succeed("su - ${user.name} -c 'DISPLAY=:0.0 xfce4-terminal &'")
+      machine.succeed("su - ${user.name} -c 'DISPLAY=:0.0 xfce4-terminal >&2 &'")
       machine.wait_for_window("Terminal")
       machine.sleep(10)
       machine.screenshot("screen")