diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index 2264e926055b28bf7bde2c3ddaa54f38bed42221..c9e29e12c40db1c19817c100b8583faa9e39402d 100644
--- a/.test-conda-env-py3.yml
+++ b/.test-conda-env-py3.yml
@@ -1,13 +1,12 @@
 name: test-conda-env-py3
 channels:
-- inducer
 - conda-forge
-- defaults
+- nodefaults
 
 dependencies:
 - git
-- conda-forge::numpy
-- conda-forge::sympy
+- numpy
+- sympy
 - pocl
 - islpy
 - pyopencl