diff --git a/pyproject.toml b/pyproject.toml
index 3e1f6503..e2b4d58e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -128,6 +128,7 @@ addopts = "-ra -m 'not hdfs' -p no:pytest-mypy-plugins"
 markers = [
   "hdfs: mark test as hdfs",
   "pathlib: mark cpython pathlib tests",
+  "natwork: mark test as requiring access to the internet",
 ]
 
 [tool.coverage.run]
diff --git a/upath/tests/implementations/test_github.py b/upath/tests/implementations/test_github.py
index 5fda42ff..4d35d0c8 100644
--- a/upath/tests/implementations/test_github.py
+++ b/upath/tests/implementations/test_github.py
@@ -14,13 +14,16 @@
 from ..utils import OverrideMeta
 from ..utils import overrides_base
 
-pytestmark = pytest.mark.skipif(
-    os.environ.get("CI", False)
-    and not (
-        platform.system() == "Linux" and sys.version_info[:2] in {(3, 9), (3, 13)}
+pytestmark = [
+    pytest.mark.skipif(
+        os.environ.get("CI", False)
+        and not (
+            platform.system() == "Linux" and sys.version_info[:2] in {(3, 9), (3, 13)}
+        ),
+        reason="Skipping GitHubPath tests to prevent rate limiting on GitHub API.",
     ),
-    reason="Skipping GitHubPath tests to prevent rate limiting on GitHub API.",
-)
+    pytest.mark.network,
+]
 
 
 def xfail_on_github_connection_error(func):
diff --git a/upath/tests/implementations/test_http.py b/upath/tests/implementations/test_http.py
index 66d76e62..aa4957e0 100644
--- a/upath/tests/implementations/test_http.py
+++ b/upath/tests/implementations/test_http.py
@@ -18,6 +18,7 @@
 except ImportError:
     pytestmark = pytest.mark.skip
 
+pytestmark = pytest.mark.network
 
 @pytest.fixture
 def internet_connection():