Register the thread_unsefe mark

Author: FrancescAlted

numexpr/tests/test_numexpr.py

@@ -14,10 +14,8 @@
 import platform
 import subprocess
 import sys
-import unittest
 import warnings
 from contextlib import contextmanager
-from unittest.mock import MagicMock
 
 import numpy
 import numpy as np
@@ -37,6 +35,9 @@
 from numexpr.expressions import ConstantNode
 from numexpr.utils import detect_number_of_cores
 
+import unittest
+from unittest.mock import MagicMock
+
 try:
     import pytest
     pytest_available = True

pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+markers =
+    thread_unsafe: mark a test as thread unsafe