Run tests with warnings as errors.

domdfcoding · domdfcoding · commit 4584f3b0e82c · 2022-02-06T21:20:03.000Z
diff --git a/tox.ini b/tox.ini
@@ -184,6 +184,9 @@ package = domdf_python_tools
 [pytest]
 addopts = --color yes --durations 25
 timeout = 300
+filterwarnings =
+    error
+    ignore:can't resolve package from __spec__ or __package__, falling back on __name__ and __path__:ImportWarning
 
 [testenv]
 setenv =
