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import pytest
import gc
from dolfin import MPI
def pytest_runtest_teardown(item):
"""Collect garbage after every test to force calling
destructors which might be collective"""
# Do the normal teardown
item.teardown()
# Collect the garbage (call destructors collectively)
del item
# NOTE: How are we sure that 'item' does not hold references
# to temporaries and someone else does not hold a reference
# to 'item'?! Well, it seems that it works...
gc.collect()
MPI.barrier(MPI.comm_world)
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