diff --git a/tests/core/pyspec/eth2spec/test/context.py b/tests/core/pyspec/eth2spec/test/context.py
index c2bbff341..7f58c6610 100644
--- a/tests/core/pyspec/eth2spec/test/context.py
+++ b/tests/core/pyspec/eth2spec/test/context.py
@@ -329,12 +329,15 @@ def disable_process_reveal_deadlines(fn):
     return with_meta_tags({'reveal_deadlines_setting': 1})(entry)
 
 
-def with_configs(configs):
+def with_configs(configs, reason=None):
     def decorator(fn):
         def wrapper(*args, spec: Spec, **kw):
             available_configs = set(configs)
             if spec.CONFIG_NAME not in available_configs:
-                dump_skipping_message(f"doesn't support this config: {spec.CONFIG_NAME}")
+                message = f"doesn't support this config: {spec.CONFIG_NAME}."
+                if reason is not None:
+                    message = f"{message} Reason: {reason}"
+                dump_skipping_message(message)
                 return None
 
             return fn(*args, spec=spec, **kw)
diff --git a/tests/core/pyspec/eth2spec/test/phase1/block_processing/test_process_chunk_challenge.py b/tests/core/pyspec/eth2spec/test/phase1/block_processing/test_process_chunk_challenge.py
index ecc704184..e916010b2 100644
--- a/tests/core/pyspec/eth2spec/test/phase1/block_processing/test_process_chunk_challenge.py
+++ b/tests/core/pyspec/eth2spec/test/phase1/block_processing/test_process_chunk_challenge.py
@@ -9,10 +9,12 @@ from eth2spec.test.helpers.attestations import (
 from eth2spec.test.helpers.state import transition_to, transition_to_valid_shard_slot
 from eth2spec.test.context import (
     PHASE0,
+    MINIMAL,
     expect_assertion_error,
     disable_process_reveal_deadlines,
     spec_state_test,
     with_all_phases_except,
+    with_configs,
 )
 from eth2spec.test.phase0.block_processing.test_process_attestation import run_attestation_processing
 
@@ -68,6 +70,7 @@ def run_custody_chunk_response_processing(spec, state, custody_response, valid=T
 
 @with_all_phases_except([PHASE0])
 @spec_state_test
+@with_configs([MINIMAL], reason="too slow")
 @disable_process_reveal_deadlines
 def test_challenge_appended(spec, state):
     transition_to_valid_shard_slot(spec, state)
@@ -92,6 +95,7 @@ def test_challenge_appended(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_challenge_empty_element_replaced(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + 1)  # Make len(offset_slots) == 1
@@ -117,6 +121,7 @@ def test_challenge_empty_element_replaced(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_duplicate_challenge(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + 1)  # Make len(offset_slots) == 1
@@ -142,6 +147,7 @@ def test_duplicate_challenge(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_second_challenge(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + 1)  # Make len(offset_slots) == 1
@@ -169,6 +175,7 @@ def test_second_challenge(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_multiple_epochs_custody(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + spec.SLOTS_PER_EPOCH * 3)
@@ -193,6 +200,7 @@ def test_multiple_epochs_custody(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_many_epochs_custody(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + spec.SLOTS_PER_EPOCH * 20)
@@ -217,6 +225,7 @@ def test_many_epochs_custody(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_off_chain_attestation(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + spec.SLOTS_PER_EPOCH)
@@ -237,6 +246,7 @@ def test_off_chain_attestation(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_custody_response(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + spec.SLOTS_PER_EPOCH)
@@ -268,6 +278,7 @@ def test_custody_response(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_custody_response_chunk_index_2(spec, state):
     transition_to(spec, state, state.slot + spec.SLOTS_PER_EPOCH)
 
@@ -298,6 +309,7 @@ def test_custody_response_chunk_index_2(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_custody_response_multiple_epochs(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + spec.SLOTS_PER_EPOCH * 3)
@@ -329,6 +341,7 @@ def test_custody_response_multiple_epochs(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_custody_response_many_epochs(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + spec.SLOTS_PER_EPOCH * 20)
diff --git a/tests/core/pyspec/eth2spec/test/phase1/block_processing/test_process_custody_slashing.py b/tests/core/pyspec/eth2spec/test/phase1/block_processing/test_process_custody_slashing.py
index 6836685b8..fc7efa5bc 100644
--- a/tests/core/pyspec/eth2spec/test/phase1/block_processing/test_process_custody_slashing.py
+++ b/tests/core/pyspec/eth2spec/test/phase1/block_processing/test_process_custody_slashing.py
@@ -10,10 +10,12 @@ from eth2spec.utils.ssz.ssz_typing import ByteList
 from eth2spec.test.helpers.state import get_balance, transition_to
 from eth2spec.test.context import (
     PHASE0,
+    MINIMAL,
     with_all_phases_except,
     spec_state_test,
     expect_assertion_error,
     disable_process_reveal_deadlines,
+    with_configs,
 )
 from eth2spec.test.phase0.block_processing.test_process_attestation import run_attestation_processing
 
@@ -113,6 +115,7 @@ def run_standard_custody_slashing_test(spec,
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_custody_slashing(spec, state):
     yield from run_standard_custody_slashing_test(spec, state)
 
@@ -120,6 +123,7 @@ def test_custody_slashing(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_incorrect_custody_slashing(spec, state):
     yield from run_standard_custody_slashing_test(spec, state, correct=False)
 
@@ -127,6 +131,7 @@ def test_incorrect_custody_slashing(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_multiple_epochs_custody(spec, state):
     yield from run_standard_custody_slashing_test(spec, state, shard_lateness=spec.SLOTS_PER_EPOCH * 3)
 
@@ -134,6 +139,7 @@ def test_multiple_epochs_custody(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_many_epochs_custody(spec, state):
     yield from run_standard_custody_slashing_test(spec, state, shard_lateness=spec.SLOTS_PER_EPOCH * 5)
 
@@ -141,6 +147,7 @@ def test_many_epochs_custody(spec, state):
 @with_all_phases_except([PHASE0])
 @spec_state_test
 @disable_process_reveal_deadlines
+@with_configs([MINIMAL], reason="too slow")
 def test_invalid_custody_slashing(spec, state):
     yield from run_standard_custody_slashing_test(
         spec,
diff --git a/tests/core/pyspec/eth2spec/test/phase1/epoch_processing/test_process_challenge_deadlines.py b/tests/core/pyspec/eth2spec/test/phase1/epoch_processing/test_process_challenge_deadlines.py
index 828ace91c..e270ff615 100644
--- a/tests/core/pyspec/eth2spec/test/phase1/epoch_processing/test_process_challenge_deadlines.py
+++ b/tests/core/pyspec/eth2spec/test/phase1/epoch_processing/test_process_challenge_deadlines.py
@@ -8,8 +8,10 @@ from eth2spec.test.helpers.attestations import (
 from eth2spec.test.helpers.state import transition_to, transition_to_valid_shard_slot
 from eth2spec.test.context import (
     PHASE0,
-    with_all_phases_except,
+    MINIMAL,
     spec_state_test,
+    with_all_phases_except,
+    with_configs,
 )
 from eth2spec.test.phase0.block_processing.test_process_attestation import run_attestation_processing
 from eth2spec.test.phase0.epoch_processing.run_epoch_process_base import run_epoch_processing_with
@@ -25,6 +27,7 @@ def run_process_challenge_deadlines(spec, state):
 
 @with_all_phases_except([PHASE0])
 @spec_state_test
+@with_configs([MINIMAL], reason="too slow")
 def test_validator_slashed_after_chunk_challenge(spec, state):
     transition_to_valid_shard_slot(spec, state)
     transition_to(spec, state, state.slot + 1)  # Make len(offset_slots) == 1
diff --git a/tests/core/pyspec/eth2spec/test/phase1/epoch_processing/test_process_reveal_deadlines.py b/tests/core/pyspec/eth2spec/test/phase1/epoch_processing/test_process_reveal_deadlines.py
index da1a60446..5777e184a 100644
--- a/tests/core/pyspec/eth2spec/test/phase1/epoch_processing/test_process_reveal_deadlines.py
+++ b/tests/core/pyspec/eth2spec/test/phase1/epoch_processing/test_process_reveal_deadlines.py
@@ -4,7 +4,9 @@ from eth2spec.test.helpers.custody import (
 from eth2spec.test.helpers.state import transition_to
 from eth2spec.test.context import (
     PHASE0,
+    MINIMAL,
     with_all_phases_except,
+    with_configs,
     spec_state_test,
 )
 from eth2spec.test.phase0.epoch_processing.run_epoch_process_base import run_epoch_processing_with
@@ -17,6 +19,7 @@ def run_process_challenge_deadlines(spec, state):
 
 @with_all_phases_except([PHASE0])
 @spec_state_test
+@with_configs([MINIMAL], reason="too slow")
 def test_validator_slashed_after_reveal_deadline(spec, state):
     assert state.validators[0].slashed == 0
     transition_to(spec, state, spec.get_randao_epoch_for_custody_period(0, 0) * spec.SLOTS_PER_EPOCH)
@@ -36,6 +39,7 @@ def test_validator_slashed_after_reveal_deadline(spec, state):
 
 @with_all_phases_except([PHASE0])
 @spec_state_test
+@with_configs([MINIMAL], reason="too slow")
 def test_validator_not_slashed_after_reveal(spec, state):
     transition_to(spec, state, spec.EPOCHS_PER_CUSTODY_PERIOD * spec.SLOTS_PER_EPOCH)
     custody_key_reveal = get_valid_custody_key_reveal(spec, state)
diff --git a/tests/generators/epoch_processing/main.py b/tests/generators/epoch_processing/main.py
index cf87e7451..d4114b93b 100644
--- a/tests/generators/epoch_processing/main.py
+++ b/tests/generators/epoch_processing/main.py
@@ -47,14 +47,12 @@ if __name__ == "__main__":
     gen_runner.run_generator(f"epoch_processing", [
         create_provider(PHASE0, key, mod_name, 'minimal') for key, mod_name in phase_0_mods
     ])
-    # TODO: disabled for testing
-    # gen_runner.run_generator(f"epoch_processing", [
-    #     create_provider(key, mod_name, 'mainnet') for key, mod_name in phase_0_mods
-    # ])
+    gen_runner.run_generator(f"epoch_processing", [
+        create_provider(PHASE0, key, mod_name, 'mainnet') for key, mod_name in phase_0_mods
+    ])
     gen_runner.run_generator(f"epoch_processing", [
         create_provider(PHASE1, key, mod_name, 'minimal') for key, mod_name in phase_1_mods
     ])
-    # Disabled for now
-    # gen_runner.run_generator(f"epoch_processing", [
-    #     create_provider(PHASE1, key, mod_name, 'mainnet') for key, mod_name in phase_1_mods
-    # ])
+    gen_runner.run_generator(f"epoch_processing", [
+        create_provider(PHASE1, key, mod_name, 'mainnet') for key, mod_name in phase_1_mods
+    ])
diff --git a/tests/generators/finality/main.py b/tests/generators/finality/main.py
index dca0ecb8d..ef2d8293f 100644
--- a/tests/generators/finality/main.py
+++ b/tests/generators/finality/main.py
@@ -4,7 +4,7 @@ from importlib import reload
 from gen_base import gen_runner, gen_typing
 from gen_from_tests.gen import generate_from_tests
 
-from eth2spec.test.context import PHASE0
+from eth2spec.test.context import PHASE0, PHASE1
 from eth2spec.test.phase0.finality import test_finality
 from eth2spec.config import config_util
 from eth2spec.phase0 import spec as spec_phase0
@@ -12,7 +12,7 @@ from eth2spec.phase1 import spec as spec_phase1
 from eth2spec.utils import bls
 
 
-def create_provider(handler_name: str, tests_src, config_name: str) -> gen_typing.TestProvider:
+def create_provider(fork_name: str, handler_name: str, tests_src, config_name: str) -> gen_typing.TestProvider:
 
     def prepare_fn(configs_path: str) -> str:
         config_util.prepare_config(configs_path, config_name)
@@ -26,14 +26,18 @@ def create_provider(handler_name: str, tests_src, config_name: str) -> gen_typin
             runner_name='finality',
             handler_name=handler_name,
             src=tests_src,
-            fork_name=PHASE0,
+            fork_name=fork_name,
         )
 
     return gen_typing.TestProvider(prepare=prepare_fn, make_cases=cases_fn)
 
 
 if __name__ == "__main__":
+    # No additional phase 1 specific rewards tests, yet.
+    key = 'finality'
     gen_runner.run_generator("finality", [
-        create_provider('finality', test_finality, 'minimal'),
-        create_provider('finality', test_finality, 'mainnet'),
+        create_provider(PHASE0, 'finality', test_finality, 'minimal'),
+        create_provider(PHASE0, 'finality', test_finality, 'mainnet'),
+        create_provider(PHASE1, 'finality', test_finality, 'minimal'),
+        create_provider(PHASE1, 'finality', test_finality, 'mainnet'),
     ])
diff --git a/tests/generators/operations/main.py b/tests/generators/operations/main.py
index c04ad2671..0ecc63f46 100644
--- a/tests/generators/operations/main.py
+++ b/tests/generators/operations/main.py
@@ -51,14 +51,12 @@ if __name__ == "__main__":
     gen_runner.run_generator(f"operations", [
         create_provider(PHASE0, key, mod_name, 'minimal') for key, mod_name in phase_0_mods
     ])
-    # TODO: disabled for testing
-    # gen_runner.run_generator(f"operations", [
-    #     create_provider(key, mod_name, 'mainnet') for key, mod_name in phase_0_mods
-    # ])
+    gen_runner.run_generator(f"operations", [
+        create_provider(PHASE0, key, mod_name, 'mainnet') for key, mod_name in phase_0_mods
+    ])
     gen_runner.run_generator(f"operations", [
         create_provider(PHASE1, key, mod_name, 'minimal') for key, mod_name in phase_1_mods
     ])
-    # Disabled for now
-    # gen_runner.run_generator(f"operations", [
-    #     create_provider(PHASE1, key, mod_name, 'mainnet') for key, mod_name in phase_1_mods
-    # ])
+    gen_runner.run_generator(f"operations", [
+        create_provider(PHASE1, key, mod_name, 'mainnet') for key, mod_name in phase_1_mods
+    ])
diff --git a/tests/generators/rewards/main.py b/tests/generators/rewards/main.py
index 30554358b..b07092d68 100644
--- a/tests/generators/rewards/main.py
+++ b/tests/generators/rewards/main.py
@@ -45,15 +45,12 @@ if __name__ == "__main__":
     gen_runner.run_generator(f"rewards", [
         create_provider(PHASE0, key, mod_name, 'minimal') for key, mod_name in phase_0_mods
     ])
-    # TODO: disabled for testing
-    # gen_runner.run_generator(f"rewards", [
-    #     create_provider(key, mod_name, 'mainnet') for key, mod_name in phase_0_mods
-    # ])
+    gen_runner.run_generator(f"rewards", [
+        create_provider(PHASE0, key, mod_name, 'mainnet') for key, mod_name in phase_0_mods
+    ])
     gen_runner.run_generator(f"rewards", [
         create_provider(PHASE1, key, mod_name, 'minimal') for key, mod_name in phase_1_mods
     ])
-    # Disabled for now
-    # gen_runner.run_generator(f"rewards", [
-    #     create_provider(PHASE1, key, mod_name, 'mainnet') for key, mod_name in phase_1_mods
-    # ])
-
+    gen_runner.run_generator(f"rewards", [
+        create_provider(PHASE1, key, mod_name, 'mainnet') for key, mod_name in phase_1_mods
+    ])
diff --git a/tests/generators/sanity/main.py b/tests/generators/sanity/main.py
index 032339970..c2669ffdc 100644
--- a/tests/generators/sanity/main.py
+++ b/tests/generators/sanity/main.py
@@ -43,14 +43,12 @@ if __name__ == "__main__":
     gen_runner.run_generator(f"sanity", [
         create_provider(PHASE0, key, mod_name, 'minimal') for key, mod_name in phase_0_mods
     ])
-    # TODO: disabled for testing
-    # gen_runner.run_generator(f"sanity", [
-    #     create_provider(key, mod_name, 'mainnet') for key, mod_name in phase_0_mods
-    # ])
+    gen_runner.run_generator(f"sanity", [
+        create_provider(PHASE0, key, mod_name, 'mainnet') for key, mod_name in phase_0_mods
+    ])
     gen_runner.run_generator(f"sanity", [
         create_provider(PHASE1, key, mod_name, 'minimal') for key, mod_name in phase_1_mods
     ])
-    # Disabled for now
-    # gen_runner.run_generator(f"sanity", [
-    #     create_provider(PHASE1, key, mod_name, 'mainnet') for key, mod_name in phase_1_mods
-    # ])
+    gen_runner.run_generator(f"sanity", [
+        create_provider(PHASE1, key, mod_name, 'mainnet') for key, mod_name in phase_1_mods
+    ])