diff --git a/pkgs/development/python-modules/great-expectations/default.nix b/pkgs/development/python-modules/great-expectations/default.nix
new file mode 100644
index 0000000000000..04a180c15eb38
--- /dev/null
+++ b/pkgs/development/python-modules/great-expectations/default.nix
@@ -0,0 +1,135 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  altair,
+  cryptography,
+  jinja2,
+  jsonschema,
+  marshmallow,
+  mistune,
+  numpy,
+  packaging,
+  pandas,
+  posthog,
+  pydantic,
+  pyparsing,
+  python-dateutil,
+  requests,
+  ruamel-yaml,
+  scipy,
+  tqdm,
+  tzlocal,
+
+  # test
+  pytestCheckHook,
+  pytest-mock,
+  pytest-order,
+  pytest-random-order,
+  click,
+  flaky,
+  freezegun,
+  invoke,
+  moto,
+  psycopg2,
+  requirements-parser,
+  responses,
+  sqlalchemy,
+}:
+
+buildPythonPackage rec {
+  pname = "great-expectations";
+  version = "1.2.1";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "great-expectations";
+    repo = "great_expectations";
+    rev = "refs/tags/${version}";
+    hash = "sha256-TV07vmc0XdP6ICv7Kws79zACCsahZ6FlhplJHbpDFNk=";
+  };
+
+  postPatch = ''
+    substituteInPlace tests/conftest.py --replace 'locale.setlocale(locale.LC_ALL, "en_US.UTF-8")' ""
+  '';
+
+  build-system = [ setuptools ];
+
+  dependencies = [
+    altair
+    cryptography
+    jinja2
+    jsonschema
+    marshmallow
+    mistune
+    numpy
+    packaging
+    pandas
+    posthog
+    pydantic
+    pyparsing
+    python-dateutil
+    requests
+    ruamel-yaml
+    scipy
+    tqdm
+    tzlocal
+  ];
+
+  pythonRelaxDeps = [
+    "altair"
+    "pandas"
+    "posthog"
+  ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+    pytest-mock
+    pytest-order
+    pytest-random-order
+    click
+    flaky
+    freezegun
+    invoke
+    moto
+    psycopg2
+    requirements-parser
+    responses
+    sqlalchemy
+  ] ++ moto.optional-dependencies.s3 ++ moto.optional-dependencies.sns;
+
+  disabledTestPaths = [
+    # try to access external URLs:
+    "tests/integration/cloud/rest_contracts"
+    "tests/integration/spark"
+
+    # moto-related import errors:
+    "tests/actions"
+    "tests/data_context"
+    "tests/datasource"
+    "tests/execution_engine"
+
+    # locale-related rendering issues, mostly:
+    "tests/core/test__docs_decorators.py"
+    "tests/expectations/test_expectation_atomic_renderers.py"
+    "tests/render"
+  ];
+
+  disabledTests = [
+    # tries to access network:
+    "test_checkpoint_run_with_data_docs_and_slack_actions_emit_page_links"
+    "test_checkpoint_run_with_slack_action_no_page_links"
+  ];
+
+  pythonImportsCheck = [ "great_expectations" ];
+  pytestFlagsArray = [ "-m 'not spark and not postgresql and not snowflake'" ];
+
+  meta = {
+    description = "Library for writing unit tests for data validation";
+    homepage = "https://docs.greatexpectations.io";
+    changelog = "https://github.com/great-expectations/great_expectations/releases/tag/${version}";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ bcdarwin ];
+  };
+}
diff --git a/pkgs/development/python-modules/moto/default.nix b/pkgs/development/python-modules/moto/default.nix
index 99a1f58beb1c6..118cef585d22e 100644
--- a/pkgs/development/python-modules/moto/default.nix
+++ b/pkgs/development/python-modules/moto/default.nix
@@ -162,6 +162,7 @@ buildPythonPackage rec {
       pyyaml
       py-partiql-parser
     ];
+    sns = [ ];
     stepfunctions = [
       antlr4-python3-runtime
       jsonpath-ng
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8bcd85ca9ae3a..800a5f16cf943 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5451,6 +5451,8 @@ self: super: with self; {
 
   greatfet = callPackage ../development/python-modules/greatfet { };
 
+  great-expectations = callPackage ../development/python-modules/great-expectations { };
+
   great-tables = callPackage ../development/python-modules/great-tables { };
 
   greeclimate = callPackage ../development/python-modules/greeclimate { };