diff --git a/tox.ini b/tox.ini
index 9f39329..92b73f0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,6 @@ deps =
     cython >= 0.28.5
     pytest
     pytest-randomly
-    pytest-cython
     cov: coverage
 changedir= {toxinidir}
 setenv =