diff --git a/flake.lock b/flake.lock
index 4c928a4..68074f7 100644
--- a/flake.lock
+++ b/flake.lock
@@ -19,11 +19,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1742288794,
-        "narHash": "sha256-Txwa5uO+qpQXrNG4eumPSD+hHzzYi/CdaM80M9XRLCo=",
+        "lastModified": 1749285348,
+        "narHash": "sha256-frdhQvPbmDYaScPFiCnfdh3B/Vh81Uuoo0w5TkWmmjU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b6eaf97c6960d97350c584de1b6dcff03c9daf42",
+        "rev": "3e3afe5174c561dee0df6f2c2b2236990146329f",
         "type": "github"
       },
       "original": {
diff --git a/nix/dibbler.nix b/nix/dibbler.nix
index 24dc21d..610b2dd 100644
--- a/nix/dibbler.nix
+++ b/nix/dibbler.nix
@@ -13,6 +13,14 @@ python3Packages.buildPythonApplication {
   # https://github.com/NixOS/nixpkgs/issues/285234
   dontCheckRuntimeDeps = true;
 
+  pythonImportsCheck = [];
+
+  doCheck = true;
+  nativeCheckInputs = with python3Packages; [
+    pytest
+    pytestCheckHook
+  ];
+
   nativeBuildInputs = with python3Packages; [ setuptools ];
   propagatedBuildInputs = with python3Packages; [
     brother-ql
diff --git a/nix/shell.nix b/nix/shell.nix
index 7c93f0f..31e8338 100644
--- a/nix/shell.nix
+++ b/nix/shell.nix
@@ -15,6 +15,9 @@ mkShell {
       psycopg2
       python-barcode
       sqlalchemy
+
+      pytest
+      pytest-cov
     ]))
   ];
 }
diff --git a/pyproject.toml b/pyproject.toml
index 3179a6f..af23cbc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,6 +20,12 @@ dependencies = [
 ]
 dynamic = ["version"]
 
+[project.optional-dependencies]
+dev = [
+    "pytest",
+    "pytest-cov",
+]
+
 [tool.setuptools.packages.find]
 include = ["dibbler*"]