diff --git a/skimage/filters/tests/test_filter_import.py b/skimage/filters/tests/test_filter_import.py
index 133ad262..406e58b8 100644
--- a/skimage/filters/tests/test_filter_import.py
+++ b/skimage/filters/tests/test_filter_import.py
@@ -3,9 +3,9 @@ from warnings import catch_warnings, simplefilter
 
 def test_filter_import():
     with catch_warnings():
-        simplefilter('ignore')
+        simplefilter('always')
         from skimage import filter as F
 
     assert('sobel' in dir(F))
     assert any(['has been renamed' in w
-                for (w, _, _) in F.__warningregistry__]), F.__warningregistry__
+                for (w, _, _) in F.__warningregistry__])