diff --git a/burnman/classes/solutionmodel.py b/burnman/classes/solutionmodel.py
index d7736696..abedeec9 100644
--- a/burnman/classes/solutionmodel.py
+++ b/burnman/classes/solutionmodel.py
@@ -10,9 +10,6 @@
 from ..utils.chemistry import process_solution_chemistry
 from .. import constants
 import warnings
-import sparse
-import string
-from copy import deepcopy
 from .material import material_property, cached_property
 from dataclasses import make_dataclass
 
diff --git a/docs/pip_requirements.txt b/docs/pip_requirements.txt
index 5487ca9c..eff5cb94 100644
--- a/docs/pip_requirements.txt
+++ b/docs/pip_requirements.txt
@@ -9,7 +9,6 @@ nbsphinx
 cvxpy
 jupyter
 autograd
-sparse
 
 # ReadTheDocs cannot build pycddlib successfully
 # because it requires gmp.h, installable only via sudo apt-get install.
diff --git a/pyproject.toml b/pyproject.toml
index 473623ac..c2147e00 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,6 @@ python = "^3.8"
 numpy = "^1.24"
 scipy = "^1.10"
 sympy = "^1.12"
-sparse = "^0.14"
 cvxpy = "^1.3"
 matplotlib = "^3.7"
 
diff --git a/test.sh b/test.sh
index 4d4968b6..e2b93841 100755
--- a/test.sh
+++ b/test.sh
@@ -18,17 +18,16 @@ then
 fi
 
 $PYTHON --version
-echo ""
-echo "Dependency tree:"
-$PYTHON -m pip install -q pipdeptree
-$PYTHON -m pipdeptree -p burnman -d 1 2> /dev/null
-echo ""
-
 # Quietly install burnman in development mode
 echo "Installing BurnMan in development mode ..."
 $PYTHON -m pip install -q -e .
 echo ""
 
+echo "Dependency tree:"
+$PYTHON -m pip install -q pipdeptree .
+$PYTHON -m pipdeptree -p burnman -d 1 2> /dev/null
+echo ""
+
 # Quietly install optional modules after burnman
 echo "Installing optional cvxpy, pycddlib, autograd and jupyter modules ..."
 $PYTHON -m pip install -q cvxpy pycddlib autograd jupyter