diff --git a/pandas/tests/window/conftest.py b/pandas/tests/window/conftest.py
index 24b28356a3099..5382f5f9202c0 100644
--- a/pandas/tests/window/conftest.py
+++ b/pandas/tests/window/conftest.py
@@ -90,13 +90,17 @@ def parallel(request):
     return request.param
 
 
-@pytest.fixture(params=[True, False])
+# Can parameterize nogil & nopython over True | False, but limiting per
+# https://github.com/pandas-dev/pandas/pull/41971#issuecomment-860607472
+
+
+@pytest.fixture(params=[False])
 def nogil(request):
     """nogil keyword argument for numba.jit"""
     return request.param
 
 
-@pytest.fixture(params=[True, False])
+@pytest.fixture(params=[True])
 def nopython(request):
     """nopython keyword argument for numba.jit"""
     return request.param