diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index 6c6ec39662853e26fc593bac5cb48fd8eb04df4a..19c340f60be941c358fe6b4f3b68907d9e7fb6bb 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