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-rw-r--r--tests/bot/rules/__init__.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/tests/bot/rules/__init__.py b/tests/bot/rules/__init__.py
index d7cd7b66b..36c986fe1 100644
--- a/tests/bot/rules/__init__.py
+++ b/tests/bot/rules/__init__.py
@@ -1,5 +1,5 @@
import unittest
-from abc import abstractmethod
+from abc import ABCMeta, abstractmethod
from typing import Callable, Dict, Iterable, List, NamedTuple, Tuple
from tests.helpers import MockMessage
@@ -12,7 +12,7 @@ class DisallowedCase(NamedTuple):
n_violations: int
-class RuleTest(unittest.TestCase):
+class RuleTest(unittest.TestCase, metaclass=ABCMeta):
"""
Abstract class for antispam rule test cases.