diff --git a/test-requirements.txt b/test-requirements.txt
@@ -9,4 +9,3 @@ pytest-cov
pytest-instafail
pytest-mock
pytest-sugar
-sumtypes
diff --git a/test/test_index.py b/test/test_index.py
@@ -4,6 +4,7 @@
# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/

import contextlib
from io import BytesIO
import logging
import os
@@ -17,7 +18,6 @@

import ddt
import pytest
-from sumtypes import constructor, sumtype

from git import (
    BlobFilter,
@@ -66,34 +66,48 @@ def _get_windows_ansi_encoding():
    return f"cp{value}"


-@sumtype
class WinBashStatus:
-    """Status of bash.exe for native Windows. Affects which commit hook tests can pass.

    Call check() to check the status. (CheckError and WinError should not typically be
    used to trigger skip or xfail, because they represent unexpected situations.)
    """

-    Inapplicable = constructor()
-    """This system is not native Windows: either not Windows at all, or Cygwin."""

-    Absent = constructor()
-    """No command for bash.exe is found on the system."""

-    Native = constructor()
-    """Running bash.exe operates outside any WSL distribution (as with Git Bash)."""

-    Wsl = constructor()
-    """Running bash.exe calls bash in a WSL distribution."""

-    WslNoDistro = constructor("process", "message")
-    """Running bash.exe tries to run bash on a WSL distribution, but none exists."""

-    CheckError = constructor("process", "message")
-    """Running bash.exe fails in an unexpected error or gives unexpected output."""

-    WinError = constructor("exception")
-    """bash.exe may exist but can't run. CreateProcessW fails unexpectedly."""

    @classmethod
    def check(cls):