diff --git a/test_libs/pyspec/eth2spec/test/phase_0/block_processing/test_process_attestation.py b/test_libs/pyspec/eth2spec/test/phase_0/block_processing/test_process_attestation.py
index 59e99ac0c..daac7efed 100644
--- a/test_libs/pyspec/eth2spec/test/phase_0/block_processing/test_process_attestation.py
+++ b/test_libs/pyspec/eth2spec/test/phase_0/block_processing/test_process_attestation.py
@@ -85,6 +85,29 @@ def test_success_since_max_epochs_per_crosslink(spec, state):
     yield from run_attestation_processing(spec, state, attestation)
 
 
+@with_all_phases
+@spec_state_test
+def test_wrong_end_epoch_with_max_epochs_per_crosslink(spec, state):
+    for _ in range(spec.MAX_EPOCHS_PER_CROSSLINK + 2):
+        next_epoch(spec, state)
+    apply_empty_block(spec, state)
+
+    attestation = get_valid_attestation(spec, state)
+    data = attestation.data
+    # test logic sanity check: make sure the attestation only includes MAX_EPOCHS_PER_CROSSLINK epochs
+    assert data.crosslink.end_epoch - data.crosslink.start_epoch == spec.MAX_EPOCHS_PER_CROSSLINK
+    # Now change it to be different
+    data.crosslink.end_epoch += 1
+
+    sign_attestation(spec, state, attestation)
+
+    for _ in range(spec.MIN_ATTESTATION_INCLUSION_DELAY):
+        next_slot(spec, state)
+    apply_empty_block(spec, state)
+
+    yield from run_attestation_processing(spec, state, attestation, False)
+
+
 @with_all_phases
 @always_bls
 @spec_state_test