diff --git a/testing/conftest.py b/testing/conftest.py
index 5f6cdd50..f533e50d 100644
--- a/testing/conftest.py
+++ b/testing/conftest.py
@@ -81,7 +81,7 @@ def version(self):
         return self.get_version()
 
 
-@pytest.yield_fixture(autouse=True)
+@pytest.fixture(autouse=True)
 def debug_mode():
     from setuptools_scm import utils
 
diff --git a/tox.ini b/tox.ini
index 9a8c1c23..f3a97a94 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,6 +6,8 @@ testpaths=testing
 filterwarnings=error
 markers=
     issue(id): reference to github issue
+# disable unraisable until investigated
+addopts = -p no:unraisableexception
 
 [flake8]
 max-complexity = 10