diff --git a/pkgs/development/python-modules/add-trailing-comma/default.nix b/pkgs/development/python-modules/add-trailing-comma/default.nix
new file mode 100644
index 000000000000..c38a4f061435
--- /dev/null
+++ b/pkgs/development/python-modules/add-trailing-comma/default.nix
@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pytestCheckHook
+, pythonOlder
+, tokenize-rt
+}:
+
+buildPythonPackage rec {
+  pname = "add-trailing-comma";
+  version = "2.2.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "asottile";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "RBOL4mM9VciHHNmCTlRBIoXqeln19MKYxgv9p6GCNvU=";
+  };
+
+  propagatedBuildInputs = [
+    tokenize-rt
+  ];
+
+  pythonImportsCheck = [
+    "add_trailing_comma"
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  meta = with lib; {
+    description = "A tool (and pre-commit hook) to automatically add trailing commas to calls and literals";
+    homepage = "https://github.com/asottile/add-trailing-comma";
+    license = licenses.mit;
+    maintainers = with maintainers; [ gador ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index dfeb7f84f6aa..5ad1e7c5b995 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -198,6 +198,8 @@ in {
     inherit (pkgs.darwin.apple_sdk.frameworks) CoreFoundation Security;
   };
 
+  add-trailing-comma = callPackage ../development/python-modules/add-trailing-comma { };
+
   addict = callPackage ../development/python-modules/addict { };
 
   addic7ed-cli = callPackage ../development/python-modules/addic7ed-cli { };