diff --git a/python/tox.ini b/python/tox.ini
index dfb5c175a..2350f3dfe 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -36,7 +36,7 @@ commands = python --version
 # Configuration
 [pytest]
 cache_dir = .tox/.cache
-python_files = *asset_test.py *bd_rate_calculator_test.py *cambi_test.py *command_line_test.py *cross_validation_test.py
+python_files = *asset_test.py *bd_rate_calculator_test.py *cambi_test.py *command_line_test.py *cross_validation_test.py *cy_test.py
 markers =
     main: Main tests