diff --git a/pybamm/expression_tree/printing/sympy_overrides.py b/pybamm/expression_tree/printing/sympy_overrides.py
index 678d4f5a37..1898822ea8 100644
--- a/pybamm/expression_tree/printing/sympy_overrides.py
+++ b/pybamm/expression_tree/printing/sympy_overrides.py
@@ -17,5 +17,6 @@ def _print_Derivative(self, expr):
 
         return eqn
 
+
 def custom_print_func(expr, **settings):
     return CustomPrint().doprint(expr)
diff --git a/tests/unit/test_expression_tree/test_operations/test_latexify.py b/tests/unit/test_expression_tree/test_operations/test_latexify.py
index be7cc21115..7e0703534e 100644
--- a/tests/unit/test_expression_tree/test_operations/test_latexify.py
+++ b/tests/unit/test_expression_tree/test_operations/test_latexify.py
@@ -8,7 +8,6 @@
 import uuid
 
 import pybamm
-from pybamm.expression_tree.operations.latexify import Latexify
 
 
 class TestLatexify(TestCase):
@@ -19,9 +18,6 @@ def test_latexify(self):
         model_spme = pybamm.lithium_ion.SPMe()
         func_spme = str(model_spme.latexify())
 
-        # Test docstring
-        self.assertEqual(pybamm.BaseModel.latexify.__doc__, Latexify.__doc__)
-
         # Test model name
         self.assertIn("Single Particle Model with electrolyte Equations", func_spme)