diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index d53bfcc..c62bdc3 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -10,32 +10,29 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: astral-sh/setup-uv@v5
+      - uses: actions/checkout@v2
+      - name: Setup Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v1
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Type Checking
+      - name: Install Dependencies
         run: |
-          uvx --with . mypy src/ptpython/
-          uvx --with . mypy examples/
-      - name: Code formatting
-        if: ${{ matrix.python-version == '3.13' }}
+          sudo apt remove python3-pip
+          python -m pip install --upgrade pip
+          python -m pip install . ruff mypy pytest readme_renderer
+          pip list
+      - name: Type Checker
         run: |
-          uvx ruff check .
-          uvx ruff format --check .
-      - name: Typos
-        if: ${{ matrix.python-version == '3.13' }}
+          mypy ptpython
+          ruff check .
+          ruff format --check .
+      - name: Run Tests
         run: |
-          uvx typos .
-      - name: Unit test
-        run: |
-          uvx --with . pytest tests/
+          ./tests/run_tests.py
       - name: Validate README.md
-        if: ${{ matrix.python-version == '3.13' }}
         # Ensure that the README renders correctly (required for uploading to PyPI).
         run: |
-          uv pip install readme_renderer
           python -m readme_renderer README.rst > /dev/null
diff --git a/CHANGELOG b/CHANGELOG
index 7706260..bef7d07 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,17 +1,6 @@
 CHANGELOG
 =========
 
-3.0.30: 2025-04-15
-------------------
-
-New features:
-- Show exception cause/context when printing chained exceptions.
-- Reworked project layout and use pyproject.toml instead of setup.py.
-
-Breaking changes:
-- Drop Python 3.7 support.
-
-
 3.0.29: 2024-07-22
 ------------------
 
diff --git a/debian/changelog b/debian/changelog
index 6052c88..e774e1e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,10 +1,3 @@
-ptpython (3.0.30-1) sid; urgency=medium
-
-  * Merging upstream version 3.0.30.
-  * Updating year in upstream copyright for 2025.
-
- -- Daniel Baumann <daniel@debian.org>  Wed, 16 Apr 2025 08:49:26 +0200
-
 ptpython (3.0.29-3) sid; urgency=medium
 
   * Updating to standards version 4.7.1.
diff --git a/debian/copyright b/debian/copyright
index 0f914e6..696ea6a 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -4,7 +4,7 @@ Upstream-Contact: Jonathan Slenders <jonathan@slenders.be>
 Source: https://github.com/prompt-toolkit/ptpython/tags
 
 Files: *
-Copyright: 2015-2025 Jonathan Slenders <jonathan@slenders.be>
+Copyright: 2015-2024 Jonathan Slenders <jonathan@slenders.be>
 License: BSD-3-clause
 
 Files: debian/*
diff --git a/examples/asyncio-python-embed.py b/examples/asyncio-python-embed.py
index cb90973..38cc1c2 100755
--- a/examples/asyncio-python-embed.py
+++ b/examples/asyncio-python-embed.py
@@ -25,7 +25,7 @@ async def print_counter() -> None:
     Coroutine that prints counters and saves it in a global variable.
     """
     while True:
-        print(f"Counter: {counter[0]}")
+        print("Counter: %i" % counter[0])
         counter[0] += 1
         await asyncio.sleep(3)
 
diff --git a/examples/asyncio-ssh-python-embed.py b/examples/asyncio-ssh-python-embed.py
index bf79df7..9bbad86 100755
--- a/examples/asyncio-ssh-python-embed.py
+++ b/examples/asyncio-ssh-python-embed.py
@@ -44,8 +44,8 @@ async def main(port: int = 8222) -> None:
     def create_server() -> MySSHServer:
         return MySSHServer(lambda: environ)
 
-    print(f"Listening on: {port}")
-    print(f'To connect, do "ssh localhost -p {port}"')
+    print("Listening on :%i" % port)
+    print('To connect, do "ssh localhost -p %i"' % port)
 
     await asyncssh.create_server(
         create_server, "", port, server_host_keys=["/etc/ssh/ssh_host_dsa_key"]
diff --git a/examples/ssh-and-telnet-embed.py b/examples/ssh-and-telnet-embed.py
index 2b293e6..62fa76d 100755
--- a/examples/ssh-and-telnet-embed.py
+++ b/examples/ssh-and-telnet-embed.py
@@ -6,8 +6,6 @@ Thanks to Vincent Michel for this!
 https://gist.github.com/vxgmichel/7685685b3e5ead04ada4a3ba75a48eef
 """
 
-from __future__ import annotations
-
 import asyncio
 import pathlib
 
@@ -17,7 +15,7 @@ from prompt_toolkit.contrib.ssh.server import (
     PromptToolkitSSHServer,
     PromptToolkitSSHSession,
 )
-from prompt_toolkit.contrib.telnet.server import TelnetConnection, TelnetServer
+from prompt_toolkit.contrib.telnet.server import TelnetServer
 
 from ptpython.repl import embed
 
@@ -30,7 +28,7 @@ def ensure_key(filename: str = "ssh_host_key") -> str:
     return str(path)
 
 
-async def interact(connection: PromptToolkitSSHSession | TelnetConnection) -> None:
+async def interact(connection: PromptToolkitSSHSession) -> None:
     global_dict = {**globals(), "print": print_formatted_text}
     await embed(return_asyncio_coroutine=True, globals=global_dict)
 
diff --git a/mypy.ini b/mypy.ini
new file mode 100644
index 0000000..5a7ef2e
--- /dev/null
+++ b/mypy.ini
@@ -0,0 +1,6 @@
+[mypy]
+ignore_missing_imports = True
+no_implicit_optional = True
+platform = win32
+strict_equality = True
+strict_optional = True
diff --git a/src/ptpython/__init__.py b/ptpython/__init__.py
similarity index 100%
rename from src/ptpython/__init__.py
rename to ptpython/__init__.py
diff --git a/src/ptpython/__main__.py b/ptpython/__main__.py
similarity index 100%
rename from src/ptpython/__main__.py
rename to ptpython/__main__.py
diff --git a/src/ptpython/completer.py b/ptpython/completer.py
similarity index 100%
rename from src/ptpython/completer.py
rename to ptpython/completer.py
diff --git a/src/ptpython/contrib/__init__.py b/ptpython/contrib/__init__.py
similarity index 100%
rename from src/ptpython/contrib/__init__.py
rename to ptpython/contrib/__init__.py
diff --git a/src/ptpython/contrib/asyncssh_repl.py b/ptpython/contrib/asyncssh_repl.py
similarity index 100%
rename from src/ptpython/contrib/asyncssh_repl.py
rename to ptpython/contrib/asyncssh_repl.py
diff --git a/src/ptpython/entry_points/__init__.py b/ptpython/entry_points/__init__.py
similarity index 100%
rename from src/ptpython/entry_points/__init__.py
rename to ptpython/entry_points/__init__.py
diff --git a/src/ptpython/entry_points/run_ptipython.py b/ptpython/entry_points/run_ptipython.py
similarity index 100%
rename from src/ptpython/entry_points/run_ptipython.py
rename to ptpython/entry_points/run_ptipython.py
diff --git a/src/ptpython/entry_points/run_ptpython.py b/ptpython/entry_points/run_ptpython.py
similarity index 97%
rename from src/ptpython/entry_points/run_ptpython.py
rename to ptpython/entry_points/run_ptpython.py
index d083858..05df971 100644
--- a/src/ptpython/entry_points/run_ptpython.py
+++ b/ptpython/entry_points/run_ptpython.py
@@ -30,9 +30,8 @@ import asyncio
 import os
 import pathlib
 import sys
-from importlib import metadata
 from textwrap import dedent
-from typing import Protocol
+from typing import IO
 
 import appdirs
 from prompt_toolkit.formatted_text import HTML
@@ -40,15 +39,17 @@ from prompt_toolkit.shortcuts import print_formatted_text
 
 from ptpython.repl import PythonRepl, embed, enable_deprecation_warnings, run_config
 
+try:
+    from importlib import metadata  # type: ignore
+except ImportError:
+    import importlib_metadata as metadata  # type: ignore
+
+
 __all__ = ["create_parser", "get_config_and_history_file", "run"]
 
 
-class _SupportsWrite(Protocol):
-    def write(self, s: str, /) -> object: ...
-
-
 class _Parser(argparse.ArgumentParser):
-    def print_help(self, file: _SupportsWrite | None = None) -> None:
+    def print_help(self, file: IO[str] | None = None) -> None:
         super().print_help()
         print(
             dedent(
diff --git a/src/ptpython/eventloop.py b/ptpython/eventloop.py
similarity index 100%
rename from src/ptpython/eventloop.py
rename to ptpython/eventloop.py
diff --git a/src/ptpython/filters.py b/ptpython/filters.py
similarity index 100%
rename from src/ptpython/filters.py
rename to ptpython/filters.py
diff --git a/src/ptpython/history_browser.py b/ptpython/history_browser.py
similarity index 99%
rename from src/ptpython/history_browser.py
rename to ptpython/history_browser.py
index 72bc576..ae0ac03 100644
--- a/src/ptpython/history_browser.py
+++ b/ptpython/history_browser.py
@@ -58,15 +58,13 @@ from ptpython.layout import get_inputmode_fragments
 from .utils import if_mousedown
 
 if TYPE_CHECKING:
-    from typing_extensions import TypeAlias
-
     from .python_input import PythonInput
 
 HISTORY_COUNT = 2000
 
 __all__ = ["HistoryLayout", "PythonHistory"]
 
-E: TypeAlias = KeyPressEvent
+E = KeyPressEvent
 
 HELP_TEXT = """
 This interface is meant to select multiple lines from the
diff --git a/src/ptpython/ipython.py b/ptpython/ipython.py
similarity index 100%
rename from src/ptpython/ipython.py
rename to ptpython/ipython.py
diff --git a/src/ptpython/key_bindings.py b/ptpython/key_bindings.py
similarity index 99%
rename from src/ptpython/key_bindings.py
rename to ptpython/key_bindings.py
index 48c5f5a..d7bb575 100644
--- a/src/ptpython/key_bindings.py
+++ b/ptpython/key_bindings.py
@@ -22,8 +22,6 @@ from prompt_toolkit.keys import Keys
 from .utils import document_is_multiline_python
 
 if TYPE_CHECKING:
-    from typing_extensions import TypeAlias
-
     from .python_input import PythonInput
 
 __all__ = [
@@ -32,7 +30,7 @@ __all__ = [
     "load_confirm_exit_bindings",
 ]
 
-E: TypeAlias = KeyPressEvent
+E = KeyPressEvent
 
 
 @Condition
diff --git a/src/ptpython/layout.py b/ptpython/layout.py
similarity index 98%
rename from src/ptpython/layout.py
rename to ptpython/layout.py
index 9768598..622df59 100644
--- a/src/ptpython/layout.py
+++ b/ptpython/layout.py
@@ -108,7 +108,7 @@ def python_sidebar(python_input: PythonInput) -> Window:
             tokens.extend(
                 [
                     ("class:sidebar", "  "),
-                    ("class:sidebar.title", f"   {category.title:36}"),
+                    ("class:sidebar.title", "   %-36s" % category.title),
                     ("class:sidebar", "\n"),
                 ]
             )
@@ -130,7 +130,7 @@ def python_sidebar(python_input: PythonInput) -> Window:
             sel = ",selected" if selected else ""
 
             tokens.append(("class:sidebar" + sel, " >" if selected else "  "))
-            tokens.append(("class:sidebar.label" + sel, f"{label:24}", select_item))
+            tokens.append(("class:sidebar.label" + sel, "%-24s" % label, select_item))
             tokens.append(("class:sidebar.status" + sel, " ", select_item))
             tokens.append(("class:sidebar.status" + sel, f"{status}", goto_next))
 
@@ -332,7 +332,7 @@ class PythonPromptMargin(PromptMargin):
             width: int, line_number: int, is_soft_wrap: bool
         ) -> StyleAndTextTuples:
             if python_input.show_line_numbers and not is_soft_wrap:
-                text = f"{line_number + 1} ".rjust(width)
+                text = ("%i " % (line_number + 1)).rjust(width)
                 return [("class:line-number", text)]
             else:
                 return to_formatted_text(get_prompt_style().in2_prompt(width))
@@ -368,7 +368,8 @@ def status_bar(python_input: PythonInput) -> Container:
         append(
             (
                 TB,
-                f"{python_buffer.working_index + 1}/{len(python_buffer._working_lines)} ",
+                "%i/%i "
+                % (python_buffer.working_index + 1, len(python_buffer._working_lines)),
             )
         )
 
@@ -491,7 +492,8 @@ def show_sidebar_button_info(python_input: PythonInput) -> Container:
         ("class:status-toolbar", " - "),
         (
             "class:status-toolbar.python-version",
-            f"{platform.python_implementation()} {version[0]}.{version[1]}.{version[2]}",
+            "%s %i.%i.%i"
+            % (platform.python_implementation(), version[0], version[1], version[2]),
         ),
         ("class:status-toolbar", " "),
     ]
diff --git a/src/ptpython/lexer.py b/ptpython/lexer.py
similarity index 100%
rename from src/ptpython/lexer.py
rename to ptpython/lexer.py
diff --git a/src/ptpython/printer.py b/ptpython/printer.py
similarity index 95%
rename from src/ptpython/printer.py
rename to ptpython/printer.py
index a3578de..85bd9c8 100644
--- a/src/ptpython/printer.py
+++ b/ptpython/printer.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import sys
 import traceback
 from dataclasses import dataclass
 from enum import Enum
@@ -253,7 +254,8 @@ class OutputPrinter:
                     columns_in_buffer += width
                     current_line.append((style, c))
 
-            yield current_line
+            if len(current_line) > 0:
+                yield current_line
 
     def _print_paginated_formatted_text(
         self, lines: Iterable[StyleAndTextTuples]
@@ -321,20 +323,14 @@ class OutputPrinter:
     def _format_exception_output(
         self, e: BaseException, highlight: bool
     ) -> Generator[OneStyleAndTextTuple, None, None]:
-        if e.__cause__:
-            yield from self._format_exception_output(e.__cause__, highlight=highlight)
-            yield (
-                "",
-                "\nThe above exception was the direct cause of the following exception:\n\n",
-            )
-        elif e.__context__:
-            yield from self._format_exception_output(e.__context__, highlight=highlight)
-            yield (
-                "",
-                "\nDuring handling of the above exception, another exception occurred:\n\n",
-            )
+        # Instead of just calling ``traceback.format_exc``, we take the
+        # traceback and skip the bottom calls of this framework.
+        t, v, tb = sys.exc_info()
 
-        tblist = list(traceback.extract_tb(e.__traceback__))
+        # Required for pdb.post_mortem() to work.
+        sys.last_type, sys.last_value, sys.last_traceback = t, v, tb
+
+        tblist = list(traceback.extract_tb(tb))
 
         for line_nr, tb_tuple in enumerate(tblist):
             if tb_tuple[0] == "<stdin>":
@@ -344,7 +340,7 @@ class OutputPrinter:
         tb_list = traceback.format_list(tblist)
         if tb_list:
             tb_list.insert(0, "Traceback (most recent call last):\n")
-        tb_list.extend(traceback.format_exception_only(type(e), e))
+        tb_list.extend(traceback.format_exception_only(t, v))
 
         tb_str = "".join(tb_list)
 
diff --git a/src/ptpython/prompt_style.py b/ptpython/prompt_style.py
similarity index 100%
rename from src/ptpython/prompt_style.py
rename to ptpython/prompt_style.py
diff --git a/src/ptpython/py.typed b/ptpython/py.typed
similarity index 100%
rename from src/ptpython/py.typed
rename to ptpython/py.typed
diff --git a/src/ptpython/python_input.py b/ptpython/python_input.py
similarity index 100%
rename from src/ptpython/python_input.py
rename to ptpython/python_input.py
diff --git a/src/ptpython/repl.py b/ptpython/repl.py
similarity index 93%
rename from src/ptpython/repl.py
rename to ptpython/repl.py
index 469ed69..6b60018 100644
--- a/src/ptpython/repl.py
+++ b/ptpython/repl.py
@@ -20,17 +20,7 @@ import types
 import warnings
 from dis import COMPILER_FLAG_NAMES
 from pathlib import Path
-from typing import (
-    Any,
-    Callable,
-    ContextManager,
-    Coroutine,
-    Iterable,
-    Literal,
-    NoReturn,
-    Sequence,
-    overload,
-)
+from typing import Any, Callable, ContextManager, Iterable, NoReturn, Sequence
 
 from prompt_toolkit.formatted_text import OneStyleAndTextTuple
 from prompt_toolkit.patch_stdout import patch_stdout as patch_stdout_context
@@ -372,7 +362,7 @@ class PythonRepl(PythonInput):
 
     def _store_eval_result(self, result: object) -> None:
         locals: dict[str, Any] = self.get_locals()
-        locals["_"] = locals[f"_{self.current_statement_index}"] = result
+        locals["_"] = locals["_%i" % self.current_statement_index] = result
 
     def get_compiler_flags(self) -> int:
         return super().get_compiler_flags() | PyCF_ALLOW_TOP_LEVEL_AWAIT
@@ -388,10 +378,6 @@ class PythonRepl(PythonInput):
         )
 
     def _handle_exception(self, e: BaseException) -> None:
-        # Required for pdb.post_mortem() to work.
-        t, v, tb = sys.exc_info()
-        sys.last_type, sys.last_value, sys.last_traceback = t, v, tb
-
         self._get_output_printer().display_exception(
             e,
             highlight=self.enable_syntax_highlighting,
@@ -515,34 +501,6 @@ class ReplExit(Exception):
     """
 
 
-@overload
-def embed(
-    globals: dict[str, Any] | None = ...,
-    locals: dict[str, Any] | None = ...,
-    configure: Callable[[PythonRepl], None] | None = ...,
-    vi_mode: bool = ...,
-    history_filename: str | None = ...,
-    title: str | None = ...,
-    startup_paths: Sequence[str | Path] | None = ...,
-    patch_stdout: bool = ...,
-    return_asyncio_coroutine: Literal[False] = ...,
-) -> None: ...
-
-
-@overload
-def embed(
-    globals: dict[str, Any] | None = ...,
-    locals: dict[str, Any] | None = ...,
-    configure: Callable[[PythonRepl], None] | None = ...,
-    vi_mode: bool = ...,
-    history_filename: str | None = ...,
-    title: str | None = ...,
-    startup_paths: Sequence[str | Path] | None = ...,
-    patch_stdout: bool = ...,
-    return_asyncio_coroutine: Literal[True] = ...,
-) -> Coroutine[Any, Any, None]: ...
-
-
 def embed(
     globals: dict[str, Any] | None = None,
     locals: dict[str, Any] | None = None,
@@ -553,7 +511,7 @@ def embed(
     startup_paths: Sequence[str | Path] | None = None,
     patch_stdout: bool = False,
     return_asyncio_coroutine: bool = False,
-) -> None | Coroutine[Any, Any, None]:
+) -> None:
     """
     Call this to embed  Python shell at the current point in your program.
     It's similar to `IPython.embed` and `bpython.embed`. ::
@@ -615,4 +573,3 @@ def embed(
     else:
         with patch_context:
             repl.run()
-        return None
diff --git a/src/ptpython/signatures.py b/ptpython/signatures.py
similarity index 100%
rename from src/ptpython/signatures.py
rename to ptpython/signatures.py
diff --git a/src/ptpython/style.py b/ptpython/style.py
similarity index 100%
rename from src/ptpython/style.py
rename to ptpython/style.py
diff --git a/src/ptpython/utils.py b/ptpython/utils.py
similarity index 100%
rename from src/ptpython/utils.py
rename to ptpython/utils.py
diff --git a/src/ptpython/validator.py b/ptpython/validator.py
similarity index 100%
rename from src/ptpython/validator.py
rename to ptpython/validator.py
diff --git a/pyproject.toml b/pyproject.toml
index 00e2d5f..ce42037 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,55 +1,3 @@
-[project]
-name = "ptpython"
-version = "3.0.30"
-description = "Python REPL build on top of prompt_toolkit"
-readme = "README.rst"
-authors = [{ name = "Jonathan Slenders" }]
-classifiers = [
-    "License :: OSI Approved :: BSD License",
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3.13",
-    "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python",
-]
-requires-python = ">=3.8"
-dependencies = [
-    "appdirs",
-    "jedi>=0.16.0",
-    # Use prompt_toolkit 3.0.43, because of `OneStyleAndTextTuple` import.
-    "prompt_toolkit>=3.0.43,<3.1.0",
-    "pygments",
-]
-
-
-[project.urls]
-Homepage = "https://github.com/prompt-toolkit/ptpython"
-Changelog = "https://github.com/prompt-toolkit/ptpython/blob/master/CHANGELOG"
-"Bug Tracker" = "https://github.com/prompt-toolkit/ptpython/issues"
-"Source Code" = "https://github.com/prompt-toolkit/ptpython"
-
-
-[project.scripts]
-ptpython = "ptpython.entry_points.run_ptpython:run"
-ptipython = "ptpython.entry_points.run_ptipython:run"
-
-
-[project.optional-dependencies]
-ptipython = ["ipython"] # For ptipython, we need to have IPython
-
-
-[tool.mypy]
-ignore_missing_imports = true
-no_implicit_optional = true
-platform = "win32"
-strict_equality = true
-strict_optional = true
-
-
 [tool.ruff]
 target-version = "py37"
 lint.select = [
@@ -74,22 +22,14 @@ lint.ignore = [
 [tool.ruff.lint.per-file-ignores]
 "examples/*" = ["T201"]  # Print allowed in examples.
 "examples/ptpython_config/config.py" = ["F401"]  # Unused imports in config.
-"src/ptpython/entry_points/run_ptipython.py" = ["T201", "F401"] # Print, import usage.
-"src/ptpython/entry_points/run_ptpython.py" = ["T201"]  # Print usage.
-"src/ptpython/ipython.py" = ["T100"]  # Import usage.
-"src/ptpython/repl.py" = ["T201"]  # Print usage.
-"src/ptpython/printer.py" = ["T201"]  # Print usage.
+"ptpython/entry_points/run_ptipython.py" = ["T201", "F401"] # Print, import usage.
+"ptpython/entry_points/run_ptpython.py" = ["T201"]  # Print usage.
+"ptpython/ipython.py" = ["T100"]  # Import usage.
+"ptpython/repl.py" = ["T201"]  # Print usage.
+"ptpython/printer.py" = ["T201"]  # Print usage.
+"tests/run_tests.py" = ["F401"]  # Unused imports.
 
 
 [tool.ruff.lint.isort]
 known-first-party = ["ptpython"]
 known-third-party = ["prompt_toolkit", "pygments", "asyncssh"]
-
-[tool.typos.default]
-extend-ignore-re = [
-    "impotr" # Intentional typo in: ./examples/ptpython_config/config.py
-]
-
-[build-system]
-requires = ["setuptools>=68"]
-build-backend = "setuptools.build_meta"
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..80dfec6
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,41 @@
+[bdist_wheel]
+universal=1
+
+[flake8]
+exclude=__init__.py
+max_line_length=150
+ignore=
+  E114,
+  E116,
+  E117,
+  E121,
+  E122,
+  E123,
+  E125,
+  E126,
+  E127,
+  E128,
+  E131,
+  E171,
+  E203,
+  E211,
+  E221,
+  E227,
+  E231,
+  E241,
+  E251,
+  E301,
+  E402,
+  E501,
+  E701,
+  E702,
+  E704,
+  E731,
+  E741,
+  F401,
+  F403,
+  F405,
+  F811,
+  W503,
+  W504,
+  E722
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..aa10176
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+import os
+import sys
+
+from setuptools import find_packages, setup
+
+with open(os.path.join(os.path.dirname(__file__), "README.rst")) as f:
+    long_description = f.read()
+
+
+setup(
+    name="ptpython",
+    author="Jonathan Slenders",
+    version="3.0.29",
+    url="https://github.com/prompt-toolkit/ptpython",
+    description="Python REPL build on top of prompt_toolkit",
+    long_description=long_description,
+    package_urls={
+        "Changelog": "https://github.com/prompt-toolkit/ptpython/blob/master/CHANGELOG",
+    },
+    project_urls={
+        "Bug Tracker": "https://github.com/prompt-toolkit/ptpython/issues",
+        "Source Code": "https://github.com/prompt-toolkit/ptpython",
+        "Changelog": "https://github.com/prompt-toolkit/ptpython/blob/master/CHANGELOG",
+    },
+    packages=find_packages("."),
+    package_data={"ptpython": ["py.typed"]},
+    install_requires=[
+        "appdirs",
+        "importlib_metadata;python_version<'3.8'",
+        "jedi>=0.16.0",
+        # Use prompt_toolkit 3.0.43, because of `OneStyleAndTextTuple` import.
+        "prompt_toolkit>=3.0.43,<3.1.0",
+        "pygments",
+    ],
+    python_requires=">=3.7",
+    classifiers=[
+        "License :: OSI Approved :: BSD License",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3 :: Only",
+        "Programming Language :: Python",
+    ],
+    entry_points={
+        "console_scripts": [
+            "ptpython = ptpython.entry_points.run_ptpython:run",
+            "ptipython = ptpython.entry_points.run_ptipython:run",
+            f"ptpython{sys.version_info[0]} = ptpython.entry_points.run_ptpython:run",
+            "ptpython{}.{} = ptpython.entry_points.run_ptpython:run".format(
+                *sys.version_info[:2]
+            ),
+            f"ptipython{sys.version_info[0]} = ptpython.entry_points.run_ptipython:run",
+            "ptipython{}.{} = ptpython.entry_points.run_ptipython:run".format(
+                *sys.version_info[:2]
+            ),
+        ]
+    },
+    extras_require={
+        "ptipython": ["ipython"],  # For ptipython, we need to have IPython
+        "all": ["black"],  # Black not always possible on PyPy
+    },
+)
diff --git a/tests/run_tests.py b/tests/run_tests.py
new file mode 100755
index 0000000..0de3743
--- /dev/null
+++ b/tests/run_tests.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+from __future__ import annotations
+
+import unittest
+
+import ptpython.completer
+import ptpython.eventloop
+import ptpython.filters
+import ptpython.history_browser
+import ptpython.key_bindings
+import ptpython.layout
+import ptpython.python_input
+import ptpython.repl
+import ptpython.style
+import ptpython.utils
+import ptpython.validator
+
+# For now there are no tests here.
+# However this is sufficient for Travis to do at least a syntax check.
+# That way we are at least sure to restrict to the Python 2.6 syntax.
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_dummy.py b/tests/test_dummy.py
deleted file mode 100755
index 922c6a3..0000000
--- a/tests/test_dummy.py
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/usr/bin/env python
-from __future__ import annotations
-
-import ptpython.completer
-import ptpython.eventloop
-import ptpython.filters
-import ptpython.history_browser
-import ptpython.key_bindings
-import ptpython.layout
-import ptpython.python_input
-import ptpython.repl
-import ptpython.style
-import ptpython.utils
-import ptpython.validator
-
-# For now there are no tests here.
-# However this is sufficient to do at least a syntax check.
-
-
-def test_dummy() -> None:
-    assert ptpython.completer
-    assert ptpython.eventloop
-    assert ptpython.filters
-    assert ptpython.history_browser
-    assert ptpython.key_bindings
-    assert ptpython.layout
-    assert ptpython.python_input
-    assert ptpython.repl
-    assert ptpython.style
-    assert ptpython.utils
-    assert ptpython.validator