Hoist this logic out of the loop, since it's used after the end of the loop
diff --git a/tests/conftest.py b/tests/conftest.py
index 778ee85..c4d6b9c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -17,11 +17,11 @@
if "backend" in metafunc.fixturenames:
filtered_backends = []
+ required = metafunc.function.requires_backend_interface
+ required_interfaces = tuple(
+ mark.kwargs["interface"] for mark in required
+ )
for backend in selected_backends:
- required = metafunc.function.requires_backend_interface
- required_interfaces = tuple(
- mark.kwargs["interface"] for mark in required
- )
if isinstance(backend, required_interfaces):
filtered_backends.append(backend)