diff --git a/.github/workflows/alpine-test.yml b/.github/workflows/alpine-test.yml
@@ -61,6 +61,29 @@ jobs:
        . .venv/bin/activate
        pip install '.[test]'

    - name: Show version and platform information
      run: |
        . .venv/bin/activate

diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
@@ -53,6 +53,8 @@ jobs:
      run: |
        git config --global --add safe.directory "$(pwd)"
        git config --global --add safe.directory "$(pwd)/.git"
        git config --global core.autocrlf false

    - name: Prepare this repo for tests
@@ -80,6 +82,60 @@ jobs:
      run: |
        pip install '.[test]'

    - name: Show version and platform information
      run: |
        uname -a

diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
@@ -87,6 +87,64 @@ jobs:
      run: |
        pip install '.[test]'

    - name: Show version and platform information
      run: |
        uname -a

diff --git a/test/test_docs.py b/test/test_docs.py
@@ -6,9 +6,6 @@
import gc
import os
import os.path
-import sys
-
-import pytest

from test.lib import TestBase
from test.lib.helper import with_rw_directory
@@ -478,11 +475,6 @@ def test_references_and_objects(self, rw_dir):

        repo.git.clear_cache()

-    @pytest.mark.xfail(
-        sys.platform == "cygwin",
-        reason="Cygwin GitPython can't find SHA for submodule",
-        raises=ValueError,
-    )
    def test_submodules(self):
        # [1-test_submodules]
        repo = self.rorepo

diff --git a/test/test_fixture_health.py b/test/test_fixture_health.py
@@ -0,0 +1,131 @@
diff --git a/test/test_repo.py b/test/test_repo.py
@@ -877,11 +877,6 @@ def test_repo_odbtype(self):
        target_type = GitCmdObjectDB
        self.assertIsInstance(self.rorepo.odb, target_type)

-    @pytest.mark.xfail(
-        sys.platform == "cygwin",
-        reason="Cygwin GitPython can't find submodule SHA",
-        raises=ValueError,
-    )
    def test_submodules(self):
        self.assertEqual(len(self.rorepo.submodules), 1)  # non-recursive
        self.assertGreaterEqual(len(list(self.rorepo.iter_submodules())), 2)

diff --git a/test/test_submodule.py b/test/test_submodule.py
@@ -480,11 +480,6 @@ def test_base_rw(self, rwrepo):
    def test_base_bare(self, rwrepo):
        self._do_base_tests(rwrepo)

-    @pytest.mark.xfail(
-        sys.platform == "cygwin",
-        reason="Cygwin GitPython can't find submodule SHA",
-        raises=ValueError,
-    )
    @pytest.mark.xfail(
        HIDE_WINDOWS_KNOWN_ERRORS,
        reason=(
@@ -513,9 +508,9 @@ def test_root_module(self, rwrepo):
        with rm.config_writer():
            pass

-        # Deep traversal gitdb / async.
        rsmsp = [sm.path for sm in rm.traverse()]
-        assert len(rsmsp) >= 2  # gitdb and async [and smmap], async being a child of gitdb.

        # Cannot set the parent commit as root module's path didn't exist.
        self.assertRaises(ValueError, rm.set_parent_commit, "HEAD")
-Original file line number
+Diff line change
@@ Expand Up / @@ -87,6 +87,64 @@ jobs: @@
           run: |
             pip install '.[test]'
         - name: Show version and platform information
           run: |
             uname -a
@@ Expand Down @@