diff --git a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
index 77452fbccde6..501486e5059b 100644
--- a/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-continuum/default.nix
@@ -42,11 +42,20 @@ buildPythonPackage rec {
     i18n = [ sqlalchemy-i18n ];
   };
 
-  nativeCheckInputs = [
-    psycopg2
-    pymysql
-    pytestCheckHook
-  ] ++ lib.flatten (lib.attrValues optional-dependencies);
+  nativeCheckInputs =
+    [
+      psycopg2
+      pymysql
+      pytestCheckHook
+    ]
+    ++ optional-dependencies.flask
+    ++ optional-dependencies.flask-login
+    ++ optional-dependencies.flask-sqlalchemy;
+
+  disabledTestPaths = [
+    # requires sqlalchemy-i18n, which is incompatible with sqlalchemy>=2
+    "tests/test_i18n.py"
+  ];
 
   preCheck = ''
     # Indicate tests that we don't have a database server at hand
diff --git a/pkgs/development/python-modules/sqlalchemy-i18n/default.nix b/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
index b3540712d926..172e1f352658 100644
--- a/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-i18n/default.nix
@@ -2,33 +2,54 @@
   lib,
   fetchPypi,
   buildPythonPackage,
+  setuptools,
   sqlalchemy,
   sqlalchemy-utils,
   six,
+  postgresql,
+  postgresqlTestHook,
+  psycopg2,
+  pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "sqlalchemy-i18n";
   version = "1.1.0";
+  pyproject = true;
 
   src = fetchPypi {
     pname = "SQLAlchemy-i18n";
     inherit version;
-    sha256 = "de33376483a581ca14218d8f57a114466c5f72b674a95839b6c4564a6e67796f";
+    hash = "sha256-3jM3ZIOlgcoUIY2PV6EURmxfcrZ0qVg5tsRWSm5neW8=";
   };
 
-  propagatedBuildInputs = [
+  build-system = [ setuptools ];
+
+  dependencies = [
     sqlalchemy
     sqlalchemy-utils
     six
   ];
 
-  # tests require running a postgresql server
-  doCheck = false;
+  pythonImportsCheck = [ "sqlalchemy_i18n" ];
 
-  meta = with lib; {
+  nativeCheckInputs = [
+    postgresql
+    postgresqlTestHook
+    psycopg2
+    pytestCheckHook
+  ];
+
+  env = {
+    PGDATABASE = "sqlalchemy_i18n_test";
+    postgresqlEnableTCP = 1;
+  };
+
+  meta = {
     homepage = "https://github.com/kvesteri/sqlalchemy-i18n";
     description = "Internationalization extension for SQLAlchemy models";
-    license = licenses.bsd3;
+    license = lib.licenses.bsd3;
+    # sqlalchemy.exc.InvalidRequestError: The 'sqlalchemy.orm.mapper()' function is removed as of SQLAlchemy 2.0.
+    broken = lib.versionAtLeast sqlalchemy.version "2";
   };
 }