pyrox.dev
1# Running Tests {#sec-running-nixos-tests}
2
3You can run tests using `nix-build`. For example, to run the test
4[`login.nix`](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests/login.nix),
5you do:
6
7```ShellSession
8$ cd /my/git/clone/of/nixpkgs
9$ nix-build -A nixosTests.login
10```
11
12After building/downloading all required dependencies, this will perform
13a build that starts a QEMU/KVM virtual machine containing a NixOS
14system. The virtual machine mounts the Nix store of the host; this makes
15VM creation very fast, as no disk image needs to be created. Afterwards,
16you can view a log of the test:
17
18```ShellSession
19$ nix-store --read-log result
20```