diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index c3680c93a813507fa085855e2bf64ce9ebbba60b..498f1a6b333eafd594b2c7982ee3b2f93913b742 100644
--- a/.test-conda-env-py3.yml
+++ b/.test-conda-env-py3.yml
@@ -1,12 +1,12 @@
 name: test-conda-env
 channels:
 - conda-forge
-- defaults
+- nodefaults
 
 dependencies:
 - python=3
 - git
-- conda-forge::numpy
+- numpy
 - pocl
 - mako
 - pybind11