diff --git a/flake.nix b/flake.nix
index e32d029..bc776a5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -30,6 +30,7 @@
         ])
         pkgs.mpv
         pkgs.grcov
+        pkgs.cargo-nextest
       ];
       RUST_SRC_PATH = "${toolchain.rust-src}/lib/rustlib/src/rust/";
     });