diff --git a/tests/test_processing.py b/tests/test_processing.py
index 0f371660..f02b9815 100644
--- a/tests/test_processing.py
+++ b/tests/test_processing.py
@@ -4,7 +4,7 @@
 from wfdb import processing
 
 
-class test_processing:
+class TestProcessing:
     """
     Test processing functions
     """
@@ -178,7 +178,7 @@ def test_correct_peaks(self):
         assert np.array_equal(yz, expected_peaks)
 
 
-class test_qrs:
+class TestQrs:
     """
     Testing QRS detectors
     """