diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index 2fafdef74419f2acafb702ae1de5d31caa030513..08b93b0198465fd5d5ec03e7613ee0c8438d4cf4 100644
--- a/.test-conda-env-py3.yml
+++ b/.test-conda-env-py3.yml
@@ -5,6 +5,7 @@ channels:
 dependencies:
 - git
 - numpy
+- libhwloc=2
 - pocl
 - islpy
 - pyopencl