diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index c3da78d..aa63655 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -8,4 +8,7 @@ dependencies:
   - networkx
   - pytest
   - pandas
-  - unyt
\ No newline at end of file
+  - unyt
+  - cassandra
+  - constrainmol
+  - parmed
\ No newline at end of file