diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index 5da5fe79d..35db923fb 100644
--- a/.test-conda-env-py3.yml
+++ b/.test-conda-env-py3.yml
@@ -7,6 +7,7 @@ dependencies:
 - python=3
 - git
 - numpy
+- libhwloc=1
 - pocl
 - mako
 - pyopencl