diff --git a/contracts/contracts/coordination/Coordinator.sol b/contracts/contracts/coordination/Coordinator.sol
index ca1c6483b..cb2500073 100644
--- a/contracts/contracts/coordination/Coordinator.sol
+++ b/contracts/contracts/coordination/Coordinator.sol
@@ -93,7 +93,7 @@ contract Coordinator is Initializable, AccessControlDefaultAdminRulesUpgradeable
     ITACoChildApplication public immutable application;
     uint96 private immutable minAuthorization; // TODO use child app for checking eligibility
 
-    Ritual[] private ritualsStub; // former rituals
+    Ritual[] internal ritualsStub; // former rituals, "internal" for testing only
     uint32 public timeout;
     uint16 public maxDkgSize;
     bool private stub1; // former isInitiationPublic
diff --git a/contracts/test/CoordinatorTestSet.sol b/contracts/test/CoordinatorTestSet.sol
index d7664553f..6b777d116 100644
--- a/contracts/test/CoordinatorTestSet.sol
+++ b/contracts/test/CoordinatorTestSet.sol
@@ -3,6 +3,7 @@
 pragma solidity ^0.8.0;
 
 import "../threshold/ITACoChildApplication.sol";
+import "../contracts/coordination/Coordinator.sol";
 
 /**
  * @notice Contract for testing Coordinator contract
@@ -33,3 +34,37 @@ contract ChildApplicationForCoordinatorMock is ITACoChildApplication {
     // solhint-disable-next-line no-empty-blocks
     function penalize(address _stakingProvider) external {}
 }
+
+contract ExtendedCoordinator is Coordinator {
+    constructor(ITACoChildApplication _application) Coordinator(_application) {}
+
+    function initiateOldRitual(
+        IFeeModel feeModel,
+        address[] calldata providers,
+        address authority,
+        uint32 duration,
+        IEncryptionAuthorizer accessController
+    ) external returns (uint32) {
+        uint16 length = uint16(providers.length);
+
+        uint32 id = uint32(ritualsStub.length);
+        Ritual storage ritual = ritualsStub.push();
+        ritual.initiator = msg.sender;
+        ritual.authority = authority;
+        ritual.dkgSize = length;
+        ritual.threshold = getThresholdForRitualSize(length);
+        ritual.initTimestamp = uint32(block.timestamp);
+        ritual.endTimestamp = ritual.initTimestamp + duration;
+        ritual.accessController = accessController;
+        ritual.feeModel = feeModel;
+
+        address previous = address(0);
+        for (uint256 i = 0; i < length; i++) {
+            Participant storage newParticipant = ritual.participant.push();
+            address current = providers[i];
+            newParticipant.provider = current;
+            previous = current;
+        }
+        return id;
+    }
+}
diff --git a/tests/test_coordinator.py b/tests/test_coordinator.py
index 22b88b092..64e799953 100644
--- a/tests/test_coordinator.py
+++ b/tests/test_coordinator.py
@@ -3,6 +3,7 @@
 
 import ape
 import pytest
+from ape.utils import ZERO_ADDRESS
 from eth_account import Account
 from hexbytes import HexBytes
 from web3 import Web3
@@ -86,9 +87,9 @@ def erc20(project, initiator):
 
 
 @pytest.fixture()
-def coordinator(project, deployer, application, initiator, oz_dependency):
+def coordinator(project, deployer, application, oz_dependency):
     admin = deployer
-    contract = project.Coordinator.deploy(
+    contract = project.ExtendedCoordinator.deploy(
         application.address,
         sender=deployer,
     )
@@ -100,7 +101,7 @@ def coordinator(project, deployer, application, initiator, oz_dependency):
         encoded_initializer_function,
         sender=deployer,
     )
-    proxy_contract = project.Coordinator.at(proxy.address)
+    proxy_contract = project.ExtendedCoordinator.at(proxy.address)
     return proxy_contract
 
 
@@ -564,3 +565,71 @@ def test_post_aggregation_fails(
     assert fee_model.totalPendingFees() == 0
     assert fee_model.pendingFees(ritualID) == 0
     fee_model.withdrawTokens(fee_model_balance_after_refund, sender=deployer)
+
+
+def test_upgrade(
+    coordinator, nodes, initiator, erc20, fee_model, treasury, deployer, global_allow_list
+):
+    coordinator.initiateOldRitual(
+        fee_model, nodes, initiator, DURATION, global_allow_list.address, sender=initiator
+    )
+    coordinator.initiateOldRitual(
+        ZERO_ADDRESS, [nodes[0]], treasury, DURATION // 2, deployer, sender=initiator
+    )
+    assert coordinator.numberOfRituals() == 0
+    coordinator.initializeNumberOfRituals(sender=deployer)
+    assert coordinator.numberOfRituals() == 2
+
+    initiate_ritual(
+        coordinator=coordinator,
+        fee_model=fee_model,
+        erc20=erc20,
+        authority=initiator,
+        nodes=nodes,
+        allow_logic=global_allow_list,
+    )
+    assert coordinator.numberOfRituals() == 3
+
+    assert coordinator.getRitualState(0) == RitualState.DKG_AWAITING_TRANSCRIPTS
+
+    ritual_struct = coordinator.rituals(0)
+    assert ritual_struct[0] == initiator
+    init, end = ritual_struct[1], ritual_struct[2]
+    assert end - init == DURATION
+    total_transcripts, total_aggregations = ritual_struct[3], ritual_struct[4]
+    assert total_transcripts == total_aggregations == 0
+    assert ritual_struct[5] == initiator
+    assert ritual_struct[6] == len(nodes)
+    assert ritual_struct[7] == 1 + len(nodes) // 2  # threshold
+    assert not ritual_struct[8]  # aggregationMismatch
+    assert ritual_struct[9] == global_allow_list.address  # accessController
+    assert ritual_struct[10] == (b"\x00" * 32, b"\x00" * 16)  # publicKey
+    assert not ritual_struct[11]  # aggregatedTranscript
+
+    ritual_struct = coordinator.rituals(1)
+    assert ritual_struct[0] == initiator
+    init, end = ritual_struct[1], ritual_struct[2]
+    assert end - init == DURATION // 2
+    total_transcripts, total_aggregations = ritual_struct[3], ritual_struct[4]
+    assert total_transcripts == total_aggregations == 0
+    assert ritual_struct[5] == treasury
+    assert ritual_struct[6] == 1
+    assert ritual_struct[7] == 1  # threshold
+    assert not ritual_struct[8]  # aggregationMismatch
+    assert ritual_struct[9] == deployer  # accessController
+    assert ritual_struct[10] == (b"\x00" * 32, b"\x00" * 16)  # publicKey
+    assert not ritual_struct[11]  # aggregatedTranscript
+
+    ritual_struct = coordinator.rituals(2)
+    assert ritual_struct[0] == initiator
+    init, end = ritual_struct[1], ritual_struct[2]
+    assert end - init == DURATION
+    total_transcripts, total_aggregations = ritual_struct[3], ritual_struct[4]
+    assert total_transcripts == total_aggregations == 0
+    assert ritual_struct[5] == initiator
+    assert ritual_struct[6] == len(nodes)
+    assert ritual_struct[7] == 1 + len(nodes) // 2  # threshold
+    assert not ritual_struct[8]  # aggregationMismatch
+    assert ritual_struct[9] == global_allow_list.address  # accessController
+    assert ritual_struct[10] == (b"\x00" * 32, b"\x00" * 16)  # publicKey
+    assert not ritual_struct[11]  # aggregatedTranscript