diff --git a/lib/matplotlib/tests/test_ticker.py b/lib/matplotlib/tests/test_ticker.py
index d6eee0d6d7bd..dc5d595304d1 100644
--- a/lib/matplotlib/tests/test_ticker.py
+++ b/lib/matplotlib/tests/test_ticker.py
@@ -239,7 +239,7 @@ def test_use_offset(self, use_offset):
             assert use_offset == tmp_form.get_useOffset()
 
 
-class TestLogFormatter(object):
+class TestLogFormatterSubLabel(object):
     def _sub_labels(self, axis, subs=()):
         "Test whether locator marks subs to be labeled"
         fmt = axis.get_minor_formatter()