diff --git a/pyproject.toml b/pyproject.toml
index 4bc78323..ef842845 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ name = "tractor"
 version = "0.1.0a6dev0"
 description = 'structured concurrent `trio`-"actors"'
 authors = [{ name = "Tyler Goodlet", email = "goodboy_foss@protonmail.com" }]
-requires-python = ">=3.12, <3.14"
+requires-python = ">=3.12, <3.15"
 readme = "docs/README.rst"
 license = "AGPL-3.0-or-later"
 keywords = [
@@ -31,6 +31,7 @@ classifiers = [
   "Programming Language :: Python :: 3 :: Only",
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: 3.14",
   "Topic :: System :: Distributed Computing",
 ]
 dependencies = [
diff --git a/tractor/_testing/pytest.py b/tractor/_testing/pytest.py
index 1d803c9e..c33406ff 100644
--- a/tractor/_testing/pytest.py
+++ b/tractor/_testing/pytest.py
@@ -227,7 +227,13 @@ def pytest_addoption(
 def pytest_configure(config):
     backend = config.option.spawn_backend
     from tractor.spawn._spawn import try_set_start_method
-    try_set_start_method(backend)
+    try:
+        try_set_start_method(backend)
+    except RuntimeError as err:
+        # e.g. `--spawn-backend=subint` on Python < 3.14 — turn the
+        # runtime gate error into a clean pytest usage error so the
+        # suite exits with a helpful banner instead of a traceback.
+        raise pytest.UsageError(str(err)) from err
 
     # register custom marks to avoid warnings see,
     # https://docs.pytest.org/en/stable/how-to/writing_plugins.html#registering-custom-markers