diff --git a/tests/prague/eip2537_bls_12_381_precompiles/test_bls12_g2msm.py b/tests/prague/eip2537_bls_12_381_precompiles/test_bls12_g2msm.py
index 67346fef85..7103580cae 100644
--- a/tests/prague/eip2537_bls_12_381_precompiles/test_bls12_g2msm.py
+++ b/tests/prague/eip2537_bls_12_381_precompiles/test_bls12_g2msm.py
@@ -20,7 +20,24 @@
 ]
 
 
-@pytest.mark.parametrize("input_data,expected_output", vectors_from_file("multiexp_G2_bls.json"))
+@pytest.mark.parametrize(
+    "input_data,expected_output",
+    vectors_from_file("multiexp_G2_bls.json")
+    + [
+        pytest.param(
+            (Spec.P2 + Scalar(Spec.Q)) * (len(Spec.G2MSM_DISCOUNT_TABLE) - 1),
+            Spec.INF_G2,
+            id="max_discount",
+            marks=pytest.mark.slow,
+        ),
+        pytest.param(
+            (Spec.P2 + Scalar(Spec.Q)) * len(Spec.G2MSM_DISCOUNT_TABLE),
+            Spec.INF_G2,
+            id="max_discount_plus_1",
+            marks=pytest.mark.slow,
+        ),
+    ],
+)
 def test_valid(
     state_test: StateTestFiller,
     pre: Alloc,