diff --git a/nixos/tests/docker-tools.nix b/nixos/tests/docker-tools.nix
index 8e0e82d64cc..3d1e39a379c 100644
--- a/nixos/tests/docker-tools.nix
+++ b/nixos/tests/docker-tools.nix
@@ -117,7 +117,8 @@ import ./make-test-python.nix ({ pkgs, ... }: {
         )
         docker.wait_until_succeeds("curl -f http://localhost:8000/")
         docker.succeed(
-            "docker rm --force nginx", "docker rmi '${examples.nginx.imageName}'",
+            "docker rm --force nginx",
+            "docker rmi '${examples.nginx.imageName}'",
         )
 
     with subtest("A pulled image can be used as base image"):