diff --git a/pkgs/development/python-modules/ibm-cloud-sdk-core/default.nix b/pkgs/development/python-modules/ibm-cloud-sdk-core/default.nix
index 3e2d61843de2..c1e70fbf9902 100644
--- a/pkgs/development/python-modules/ibm-cloud-sdk-core/default.nix
+++ b/pkgs/development/python-modules/ibm-cloud-sdk-core/default.nix
@@ -7,7 +7,6 @@
 , pythonOlder
 , requests
 , responses
-, tox
 }:
 
 buildPythonPackage rec {
@@ -31,7 +30,6 @@ buildPythonPackage rec {
   checkInputs = [
     pytestCheckHook
     responses
-    tox
   ];
 
   disabledTests = [