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-rw-r--r--tests/mixins.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/mixins.py b/tests/mixins.py
index e279500c..ff47a4da 100644
--- a/tests/mixins.py
+++ b/tests/mixins.py
@@ -47,7 +47,7 @@ class PytestBase(object):
def del_environ(self, name):
"""Delete an environment variable, unless we set it."""
- self._monkeypatch.delenv(name)
+ self._monkeypatch.delenv(name, raising=False)
class TempDirMixin(object):