diff --git a/nixos/tests/ghostunnel-modular.nix b/nixos/tests/ghostunnel-modular.nix
index a1f17bc03400..bb4cef2a9f08 100644
--- a/nixos/tests/ghostunnel-modular.nix
+++ b/nixos/tests/ghostunnel-modular.nix
@@ -54,6 +54,7 @@
   };
 
   testScript = ''
+    import os
 
     # prepare certificates
 
diff --git a/nixos/tests/ghostunnel.nix b/nixos/tests/ghostunnel.nix
index 417f1a64765b..acd9c4331835 100644
--- a/nixos/tests/ghostunnel.nix
+++ b/nixos/tests/ghostunnel.nix
@@ -48,6 +48,7 @@
   };
 
   testScript = ''
+    import os
 
     # prepare certificates
 
diff --git a/nixos/tests/haproxy.nix b/nixos/tests/haproxy.nix
index 24c355788a38..107010528737 100644
--- a/nixos/tests/haproxy.nix
+++ b/nixos/tests/haproxy.nix
@@ -69,6 +69,8 @@
       };
   };
   testScript = ''
+    import os
+
     # Helpers
     def cmd(command):
       print(f"+{command}")
diff --git a/nixos/tests/podman/tls-ghostunnel.nix b/nixos/tests/podman/tls-ghostunnel.nix
index fb4a43fd4a89..1fcfd08f0efc 100644
--- a/nixos/tests/podman/tls-ghostunnel.nix
+++ b/nixos/tests/podman/tls-ghostunnel.nix
@@ -83,6 +83,7 @@ import ../make-test-python.nix (
     };
 
     testScript = ''
+      import os
       import shlex