diff --git a/pkgs/development/python-modules/testing-postgresql/default.nix b/pkgs/development/python-modules/testing-postgresql/default.nix
deleted file mode 100644
index 5a786a4b01d2..000000000000
--- a/pkgs/development/python-modules/testing-postgresql/default.nix
+++ /dev/null
@@ -1,71 +0,0 @@
-{
-  lib,
-  buildPythonPackage,
-  fetchFromGitHub,
-  setuptools,
-  pg8000,
-  postgresql,
-  psycopg2,
-  pytestCheckHook,
-  pythonOlder,
-  sqlalchemy,
-  testing-common-database,
-}:
-
-buildPythonPackage {
-  pname = "testing-postgresql";
-  # Version 1.3.0 isn't working so let's use the latest commit from GitHub
-  version = "unstable-2017-10-31";
-  pyproject = true;
-
-  disabled = pythonOlder "3.7";
-
-  src = fetchFromGitHub {
-    owner = "tk0miya";
-    repo = "testing.postgresql";
-    rev = "c81ded434d00ec8424de0f9e1f4063c778c6aaa8";
-    hash = "sha256-A4tahAaa98X66ZYa3QxIQDZkwAwVB6ZDRObEhkbUWKs=";
-  };
-
-  build-system = [ setuptools ];
-
-  dependencies = [
-    testing-common-database
-    pg8000
-  ];
-
-  nativeCheckInputs = [
-    pytestCheckHook
-    psycopg2
-    sqlalchemy
-  ];
-
-  # Add PostgreSQL to search path
-  prePatch = ''
-    substituteInPlace src/testing/postgresql.py \
-      --replace-fail "/usr/local/pgsql" "${postgresql}"
-  '';
-
-  pythonRelaxDeps = [ "pg8000" ];
-
-  postPatch = ''
-    substituteInPlace setup.py \
-      --replace-fail "pg8000 >= 1.10" "pg8000"
-    substituteInPlace tests/test_postgresql.py \
-      --replace-fail "self.assertRegexpMatches" "self.assertRegex"
-  '';
-
-  pythonImportsCheck = [ "testing.postgresql" ];
-
-  # Fix tests for Darwin build. See:
-  # https://github.com/NixOS/nixpkgs/pull/74716#issuecomment-598546916
-  __darwinAllowLocalNetworking = true;
-
-  meta = with lib; {
-    description = "Use temporary postgresql instance in testing";
-    homepage = "https://github.com/tk0miya/testing.postgresql";
-    license = licenses.asl20;
-    platforms = platforms.linux;
-    maintainers = with maintainers; [ jluttine ];
-  };
-}
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index ad046a06b247..040337a1ab91 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -754,6 +754,7 @@ mapAliases ({
   tensorflow-estimator_2 = tensorflow-estimator; # added 2021-11-25
   tensorflow-tensorboard = tensorboard; # added 2022-03-06
   tensorflow-tensorboard_2 = tensorflow-tensorboard; # added 2021-11-25
+  testing-postgresql = throw "testing-postgresql has been removed, since it is unmaintained since 2017"; # added 2025-05-25
   tilestache = throw "tilestache is unmaintained and Python3 compatibility is unknown"; # Added 2025-03-23
   Theano = theano; # added 2023-02-19
   TheanoWithCuda = theanoWithCuda; # added 2023-02-19
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b464469fa31f..94ed5ed73b58 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -17282,8 +17282,6 @@ self: super: with self; {
 
   testing-common-database = callPackage ../development/python-modules/testing-common-database { };
 
-  testing-postgresql = callPackage ../development/python-modules/testing-postgresql { };
-
   testpath = callPackage ../development/python-modules/testpath { };
 
   testrail-api = callPackage ../development/python-modules/testrail-api { };