diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5b450f5ef..670667396 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -173,6 +173,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: kkrt-labs/ef-tests
+          ref: v0.2.1
       - name: Checkout local skip file
         uses: actions/checkout@v4
         with:
diff --git a/src/kakarot/account.cairo b/src/kakarot/account.cairo
index c5eac7b2f..cb44e68ad 100644
--- a/src/kakarot/account.cairo
+++ b/src/kakarot/account.cairo
@@ -126,7 +126,7 @@ namespace Account {
 
         // Upgrade the target starknet contract's class if it's not the latest one.
         // The contract must be deployed on starknet already.
-        Internals.check_and_upgrade_account_class(address);
+        // Internals.check_and_upgrade_account_class(address);
 
         let (bytecode_len, bytecode) = IAccount.bytecode(contract_address=starknet_address);
         let (nonce) = IAccount.get_nonce(contract_address=starknet_address);
diff --git a/tests/end_to_end/test_account.py b/tests/end_to_end/test_account.py
index c3d39359d..3768fea76 100644
--- a/tests/end_to_end/test_account.py
+++ b/tests/end_to_end/test_account.py
@@ -161,6 +161,7 @@ async def test_should_update_cairo1_helpers_class(
             )
 
     class TestAutoUpgradeContracts:
+        @pytest.mark.skip(reason="alpha_release_disabled")
         async def test_should_upgrade_outdated_contract_transaction_target(
             self,
             starknet: FullNodeClient,
@@ -193,6 +194,7 @@ async def test_should_upgrade_outdated_contract_transaction_target(
             new_class = await starknet.get_class_hash_at(counter_starknet_address)
             assert new_class == target_class
 
+        @pytest.mark.skip(reason="alpha_release_disabled")
         async def test_should_upgrade_outdated_contract_called_contract(
             self,
             starknet: FullNodeClient,