diff --git a/src/rmstest.jl b/src/rmstest.jl
index c9128bd1..7da9ca30 100644
--- a/src/rmstest.jl
+++ b/src/rmstest.jl
@@ -1,7 +1,6 @@
 using PyCall
 const Chem = PyNULL()
 const molecule = PyNULL()
-const species = PyNULL()
 const fragment = PyNULL()
 const pydot = PyNULL()
 copy!(Chem,pyimport_conda("rdkit.Chem","rdkit","rmg"))