Let's see whether wx+osx works now.

anntzer · anntzer · commit 67bbd7519b9b · 2018-09-07T10:28:03.000+02:00
diff --git a/lib/matplotlib/tests/test_backends_interactive.py b/lib/matplotlib/tests/test_backends_interactive.py
@@ -32,8 +32,6 @@ def _get_testable_interactive_backends():
             reason = "No $DISPLAY"
         elif any(importlib.util.find_spec(dep) is None for dep in deps):
             reason = "Missing dependency"
-        elif "wx" in deps and sys.platform == "darwin":
-            reason = "wx backends known not to work on OSX"
         backends.append(pytest.mark.skip(reason=reason)(backend) if reason
                         else backend)
     return backends
