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-rw-r--r--tests/conftest.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/conftest.py b/tests/conftest.py
index 10761cdd..c2e0a893 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -16,6 +16,10 @@ import pytest
from coverage import env
+# Pytest will rewrite assertions in test modules, but not elsewhere.
+# This tells pytest to also rewrite assertions in coveragetest.py.
+pytest.register_assert_rewrite("tests.coveragetest")
+
# Pytest can take additional options:
# $set_env.py: PYTEST_ADDOPTS - Extra arguments to pytest.