diff --git a/tox.ini b/tox.ini
index d27aa93f..d5c28db1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -95,7 +95,7 @@ commands =
     devdeps: python -m pip install --pre --upgrade --extra-index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy
     pip freeze
     pytest --pyargs regions {toxinidir}/docs \
-    cov: --cov regions --cov-config={toxinidir}/pyproject.toml --cov-report xml:{toxinidir}coverage xml \
+    cov: --cov regions --cov-config={toxinidir}/pyproject.toml --cov-report xml:{toxinidir}coverage.xml \
     {posargs}
 
 [testenv:build_docs]