[CI] Skip Windows-incompatible tests in optional deps CI

test/compile/test_compile_value.py

@@ -5,6 +5,8 @@
 """Tests for torch.compile compatibility of value estimation functions."""
 from __future__ import annotations
 
+import sys
+
 import pytest
 import torch
 
@@ -15,7 +17,10 @@
     vec_td_lambda_return_estimate,
 )
 
+IS_WINDOWS = sys.platform == "win32"
+
 
+@pytest.mark.skipif(IS_WINDOWS, reason="windows tests do not support compile")
 class TestValueFunctionCompile:
     """Test compilation of value estimation functions."""
 

test/test_rb.py

@@ -4610,6 +4610,9 @@ def transform(td):
         assert rb._init_writer is None
 
 
+@pytest.mark.skipif(
+    _os_is_windows, reason="Windows file locking prevents cleanup tests"
+)
 class TestLazyMemmapStorageCleanup:
     """Tests for LazyMemmapStorage automatic cleanup functionality."""
 

test/test_setup.py

@@ -8,6 +8,7 @@
 import pytest
 
 _ROOT = Path(__file__).resolve().parents[1]
+_IS_WINDOWS = sys.platform == "win32"
 
 
 def _run(cmd, *, cwd, env=None, timeout=60 * 60) -> str:
@@ -76,7 +77,19 @@ def _expected_dist_version(base_version: str) -> str:
     return f"{base_version}+g{_git(['rev-parse', '--short', 'HEAD'])}"
 
 
-@pytest.mark.parametrize("editable", [True, False], ids=["editable", "wheel"])
+@pytest.mark.parametrize(
+    "editable",
+    [
+        pytest.param(
+            True,
+            marks=pytest.mark.skipif(
+                _IS_WINDOWS, reason="Windows file locking prevents editable re-install"
+            ),
+            id="editable",
+        ),
+        pytest.param(False, id="wheel"),
+    ],
+)
 def test_install_no_deps_has_nonzero_version(editable: bool, tmp_path: Path):
     # Requires git checkout.
     if not (_ROOT / ".git").exists():