diff --git a/flake.nix b/flake.nix
index 14466c0..cd7077c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -24,6 +24,7 @@
           flask-sqlalchemy
           sqlalchemy
 
+          pytest
         ]);
       in {
         devShell = pkgs.devshell.mkShell {
diff --git a/requirements.txt b/requirements.txt
index c9b0eb6..ee67d1e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,5 @@ numpy
 flask
 flask-sqlalchemy
 sqlalchemy
+
+pytest