diff --git a/beacon_node/beacon_chain/test_harness/examples/chain.yaml b/beacon_node/beacon_chain/test_harness/examples/chain.yaml
index 036871aeb..4c4946c5d 100644
--- a/beacon_node/beacon_chain/test_harness/examples/chain.yaml
+++ b/beacon_node/beacon_chain/test_harness/examples/chain.yaml
@@ -20,8 +20,8 @@ test_cases:
           amount: 32
           merkle_index: 2
       proposer_slashings:
-        - slot: 8 # At slot 8, we trigger a proposal slashing occurring
-          proposer_index: 42 # We penalize the validator at position 42
+        - slot: 8 # At slot 8, trigger a proposal slashing
+          proposer_index: 42 # Penalize the validator at position 42
           proposal_1_shard: 0
           proposal_1_slot: 15
           proposal_1_root: !!binary |
@@ -30,69 +30,9 @@ test_cases:
           proposal_2_slot: 15
           proposal_2_root: !!binary |
             DIFFERENTKAslkjdkajsdljasdkajlksjdasldjasdd
+      attester_slashings:
+          # At slot 2, trigger an attester slashing for validators #11 and #12
+        - slot: 2
+          validator_indices: [11, 12]
     results:
       num_validators: 1000
-  - config:
-      epoch_length: 64
-      deposits_for_chain_start: 16384
-      num_slots: 64
-      deposits:
-        - slot: 1
-          amount: 32
-          merkle_index: 0
-          pubkey: !!binary |
-            SlAAbShSkUg7PLiPHZI/rTS1uAvKiieOrifPN6Moso0=
-        - slot: 15
-          amount: 32
-          merkle_index: 1
-          pubkey: !!binary |
-            Oklajsjdkaklsdlkajsdjlajslkdjlkasjlkdjlajdsd
-        - slot: 55
-          amount: 32
-          merkle_index: 2
-          pubkey: !!binary |
-            LkmqmqoodLKAslkjdkajsdljasdkajlksjdasldjasdd
-      proposer_slashings:
-        - slot: 16 # At slot 16, we trigger a proposal slashing occurring
-          proposer_index: 16385 # We penalize the proposer that was just added from slot 15
-          proposal_1_shard: 0
-          proposal_1_slot: 15
-          proposal_1_root: !!binary |
-            LkmqmqoodLKAslkjdkajsdljasdkajlksjdasldjasdd
-          proposal_2_shard: 0
-          proposal_2_slot: 15
-          proposal_2_root: !!binary |
-            LkmqmqoodLKAslkjdkajsdljasdkajlksjdasldjasdd
-      attester_slashings:
-        - slot: 59 # At slot 59, we trigger a attester slashing
-          slashable_vote_data_1_slot: 55
-          slashable_vote_data_2_slot: 55
-          slashable_vote_data_1_justified_slot: 0
-          slashable_vote_data_2_justified_slot: 1
-          slashable_vote_data_1_custody_0_indices: [16386]
-          slashable_vote_data_1_custody_1_indices: []
-          slashable_vote_data_2_custody_0_indices: []
-          slashable_vote_data_2_custody_1_indices: [16386]
-    results:
-      slot: 64
-      num_validators: 16387
-      penalized_validators: [16385, 16386] # We test that the validators at indices 16385, 16386 were indeed penalized
-  - config:
-      skip_slots: [10, 20]
-      epoch_length: 64
-      deposits_for_chain_start: 1000
-      num_slots: 128 # Testing advancing state's slot == 2*SlotsPerEpoch
-      deposits:
-        - slot: 10
-          amount: 32
-          merkle_index: 0
-          pubkey: !!binary |
-            SlAAbShSkUg7PLiPHZI/rTS1uAvKiieOrifPN6Moso0=
-        - slot: 20
-          amount: 32
-          merkle_index: 1
-          pubkey: !!binary |
-            Oklajsjdkaklsdlkajsdjlajslkdjlkasjlkdjlajdsd
-    results:
-      slot: 128
-      num_validators: 1000 # Validator registry should not have grown if slots 10 and 20 were skipped