diff --git a/test_env.yml b/test_env.yml
index d32ba3d3..a823f31e 100644
--- a/test_env.yml
+++ b/test_env.yml
@@ -5,6 +5,7 @@ channels:
 dependencies:
   - python
   - pip
+  - rdkit
   - pyyaml
   - mbuild=0.14.2
   - mdtraj