diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index 72deaa087..ae4925c85 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -20,6 +20,7 @@ dependencies:
   - mdtraj
   - netcdf4
   - networkx >=2.0
+  - nose
   - numba >=0.55.2
   - numexpr
   - numpy >=1.14