diff --git a/tests/unit/test_parameters/test_parameter_values.py b/tests/unit/test_parameters/test_parameter_values.py
index 3610b53424..7b5fd38bf0 100644
--- a/tests/unit/test_parameters/test_parameter_values.py
+++ b/tests/unit/test_parameters/test_parameter_values.py
@@ -267,6 +267,15 @@ def test_process_symbol(self):
         self.assertEqual(processed_a.value, 4)
         self.assertEqual(processed_x, x)
 
+        # process EvaluateAt
+        evaluate_at = pybamm.EvaluateAt(x, aa)
+        processed_evaluate_at = parameter_values.process_symbol(evaluate_at)
+        self.assertIsInstance(processed_evaluate_at, pybamm.EvaluateAt)
+        self.assertEqual(processed_evaluate_at.children[0], x)
+        self.assertEqual(processed_evaluate_at.position, 4)
+        with self.assertRaisesRegex(ValueError, "'position' in 'EvaluateAt'"):
+            parameter_values.process_symbol(pybamm.EvaluateAt(x, x))
+
         # process broadcast
         whole_cell = ["negative electrode", "separator", "positive electrode"]
         broad = pybamm.PrimaryBroadcast(a, whole_cell)