diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index 4c0b81ef92da0e9f13389e5b5c967ff8008dc94c..97b75b474ac88ba4d0a01ac8515695f37f33dc28 100644
--- a/.test-conda-env-py3.yml
+++ b/.test-conda-env-py3.yml
@@ -1,7 +1,13 @@
 name: test-conda-env-py3
 channels:
 - conda-forge
+
+# FIXME: revert to 'defaults' (without quotes) after
+# https://github.com/ContinuumIO/anaconda-issues/issues/9663
+# is addressed. Context: 
+# https://gitlab.tiker.net/inducer/pyopencl/merge_requests/37
 - https://repo.continuum.io/pkgs/main
+
 dependencies:
 - git
 - conda-forge::numpy