diff --git a/tests/core/pyspec/eth2spec/test/phase0/sanity/test_blocks.py b/tests/core/pyspec/eth2spec/test/phase0/sanity/test_blocks.py
index 6d7ff096a..c712ded70 100644
--- a/tests/core/pyspec/eth2spec/test/phase0/sanity/test_blocks.py
+++ b/tests/core/pyspec/eth2spec/test/phase0/sanity/test_blocks.py
@@ -22,7 +22,7 @@ from eth2spec.test.helpers.shard_transitions import get_shard_transition_of_comm
 
 from eth2spec.test.context import (
     PHASE0, PHASE1,
-    spec_state_test, with_all_phases, expect_assertion_error, always_bls, with_phases,
+    spec_state_test, with_all_phases, expect_assertion_error, always_bls, with_phases, dump_skipping_message,
 )
 
 
@@ -291,10 +291,9 @@ def test_empty_epoch_transition(spec, state):
 @with_all_phases
 @spec_state_test
 def test_empty_epoch_transition_not_finalizing(spec, state):
-    # Don't run for non-minimal configs, it takes very long, and the effect
-    # of calling finalization/justification is just the same as with the minimal configuration.
     if spec.SLOTS_PER_EPOCH > 8:
-        return
+        return dump_skipping_message("Skip mainnet config for saving time."
+                                     " Minimal config suffice to cover the target-of-test.")
 
     # copy for later balance lookups.
     pre_balances = list(state.balances)
@@ -480,9 +479,8 @@ def test_attester_slashing(spec, state):
 @with_all_phases
 @spec_state_test
 def test_duplicate_attester_slashing(spec, state):
-    # Skip test if config cannot handle multiple AttesterSlashings per block
     if spec.MAX_ATTESTER_SLASHINGS < 2:
-        return
+        return dump_skipping_message("Skip test if config cannot handle multiple AttesterSlashings per block")
 
     attester_slashing = get_valid_attester_slashing(spec, state, signed_1=True, signed_2=True)
     attester_slashings = [attester_slashing, attester_slashing.copy()]
@@ -509,9 +507,8 @@ def test_duplicate_attester_slashing(spec, state):
 @with_all_phases
 @spec_state_test
 def test_multiple_attester_slashings_no_overlap(spec, state):
-    # Skip test if config cannot handle multiple AttesterSlashings per block
     if spec.MAX_ATTESTER_SLASHINGS < 2:
-        return
+        return dump_skipping_message("Skip test if config cannot handle multiple AttesterSlashings per block")
 
     # copy for later balance lookups.
     pre_state = state.copy()
@@ -550,9 +547,8 @@ def test_multiple_attester_slashings_no_overlap(spec, state):
 @with_all_phases
 @spec_state_test
 def test_multiple_attester_slashings_partial_overlap(spec, state):
-    # Skip test if config cannot handle multiple AttesterSlashings per block
     if spec.MAX_ATTESTER_SLASHINGS < 2:
-        return
+        return dump_skipping_message("Skip test if config cannot handle multiple AttesterSlashings per block")
 
     # copy for later balance lookups.
     pre_state = state.copy()
@@ -888,9 +884,9 @@ def test_historical_batch(spec, state):
 @with_all_phases
 @spec_state_test
 def test_eth1_data_votes_consensus(spec, state):
-    # Don't run when it will take very, very long to simulate. Minimal configuration suffices.
     if spec.EPOCHS_PER_ETH1_VOTING_PERIOD > 2:
-        return
+        return dump_skipping_message("Skip test if config with longer `EPOCHS_PER_ETH1_VOTING_PERIOD` for saving time."
+                                     " Minimal config suffice to cover the target-of-test.")
 
     voting_period_slots = spec.EPOCHS_PER_ETH1_VOTING_PERIOD * spec.SLOTS_PER_EPOCH
 
@@ -932,9 +928,9 @@ def test_eth1_data_votes_consensus(spec, state):
 @with_all_phases
 @spec_state_test
 def test_eth1_data_votes_no_consensus(spec, state):
-    # Don't run when it will take very, very long to simulate. Minimal configuration suffices.
     if spec.EPOCHS_PER_ETH1_VOTING_PERIOD > 2:
-        return
+        return dump_skipping_message("Skip test if config with longer `EPOCHS_PER_ETH1_VOTING_PERIOD` for saving time."
+                                     " Minimal config suffice to cover the target-of-test.")
 
     voting_period_slots = spec.EPOCHS_PER_ETH1_VOTING_PERIOD * spec.SLOTS_PER_EPOCH