diff --git a/nixos/tests/fish.nix b/nixos/tests/fish.nix
index 97c4e8e37ac1..68fba428439b 100644
--- a/nixos/tests/fish.nix
+++ b/nixos/tests/fish.nix
@@ -1,4 +1,4 @@
-import ./make-test.nix ({ pkgs, ... }: {
+import ./make-test-python.nix ({ pkgs, ... }: {
   name = "fish";
 
   machine =
@@ -14,8 +14,11 @@ import ./make-test.nix ({ pkgs, ... }: {
 
   testScript =
     ''
-      $machine->waitForFile("/etc/fish/generated_completions/coreutils.fish");
-      $machine->waitForFile("/etc/fish/generated_completions/kill.fish");
-      $machine->succeed("fish -ic 'echo \$fish_complete_path' | grep -q '/share/fish/completions /etc/fish/generated_completions /root/.local/share/fish/generated_completions\$'");
+      start_all()
+      machine.wait_for_file("/etc/fish/generated_completions/coreutils.fish")
+      machine.wait_for_file("/etc/fish/generated_completions/kill.fish")
+      machine.succeed(
+          "fish -ic 'echo $fish_complete_path' | grep -q '/share/fish/completions /etc/fish/generated_completions /root/.local/share/fish/generated_completions$'"
+      )
     '';
 })