diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index f277a48523488996c4296fac3c29d0ee4ee5ab0f..1b35907b017e46cc11e6d7c503b85f929dccf2f9 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
 - pyopencl