1 files changed, 5 insertions, 0 deletions

diff --git a/test/ec/test_formula.py b/test/ec/test_formula.py
index c0eed28..d5f8392 100644
--- a/test/ec/test_formula.py
+++ b/test/ec/test_formula.py
@@ -8,6 +8,7 @@ class FormulaTests(TestCase):
     def setUp(self):
         self.secp128r1 = get_params("secg", "secp128r1", "projective")
         self.add = self.secp128r1.curve.coordinate_model.formulas["add-2007-bl"]
+        self.dbl = self.secp128r1.curve.coordinate_model.formulas["dbl-2007-bl"]
 
     def test_wrong_call(self):
         with self.assertRaises(ValueError):
@@ -23,6 +24,10 @@ class FormulaTests(TestCase):
         self.assertEqual(self.add.inputs, {"X1", "Y1", "Z1", "X2", "Y2", "Z2"})
         self.assertEqual(self.add.outputs, {"X3", "Y3", "Z3"})
 
+    def test_eq(self):
+        self.assertEqual(self.add, self.add)
+        self.assertNotEqual(self.add, self.dbl)
+
     def test_num_ops(self):
         self.assertEqual(self.add.num_operations, 33)
         self.assertEqual(self.add.num_multiplications, 17)