diff --git a/lib/spack/spack/test/url_fetch.py b/lib/spack/spack/test/url_fetch.py
index 6dd548d8583..dadac0944e1 100644
--- a/lib/spack/spack/test/url_fetch.py
+++ b/lib/spack/spack/test/url_fetch.py
@@ -173,8 +173,6 @@ def test_fetch(
             assert "echo Building..." in contents
 
 
-# TODO-27021
-@pytest.mark.not_on_windows("Not supported on Windows (yet)")
 @pytest.mark.parametrize(
     "spec,url,digest",
     [
@@ -205,7 +203,6 @@ def test_from_list_url(mock_packages, config, spec, url, digest, _fetch_method):
         assert fetch_strategy.extra_options == {"timeout": 60}
 
 
-@pytest.mark.not_on_windows("Not supported on Windows (yet)")
 @pytest.mark.parametrize("_fetch_method", ["curl", "urllib"])
 @pytest.mark.parametrize(
     "requested_version,tarball,digest",
diff --git a/var/spack/repos/builtin.mock/packages/url-list-test/package.py b/var/spack/repos/builtin.mock/packages/url-list-test/package.py
index 0beae47abcb..416451293fa 100644
--- a/var/spack/repos/builtin.mock/packages/url-list-test/package.py
+++ b/var/spack/repos/builtin.mock/packages/url-list-test/package.py
@@ -5,6 +5,7 @@
 
 import spack.paths
 from spack.package import *
+from spack.util.url import path_to_file_url
 
 
 class UrlListTest(Package):
@@ -13,8 +14,8 @@ class UrlListTest(Package):
     homepage = "http://www.url-list-example.com"
 
     web_data_path = join_path(spack.paths.test_path, "data", "web")
-    url = "file://" + web_data_path + "/foo-0.0.0.tar.gz"
-    list_url = "file://" + web_data_path + "/index.html"
+    url = path_to_file_url(join_path(spack.paths.test_path, "data", "web") + "/foo-0.0.0.tar.gz")
+    list_url = path_to_file_url(join_path(spack.paths.test_path, "data", "web") + "/index.html")
     list_depth = 3
 
     version("0.0.0", md5="00000000000000000000000000000000")