diff --git a/src/FormFlow/JourneyInstance.cs b/src/FormFlow/JourneyInstance.cs
index fe22d37..8406f61 100644
--- a/src/FormFlow/JourneyInstance.cs
+++ b/src/FormFlow/JourneyInstance.cs
@@ -11,7 +11,6 @@ public class JourneyInstance
 
     internal JourneyInstance(
         IUserInstanceStateProvider stateProvider,
-        string journeyName,
         JourneyInstanceId instanceId,
         Type stateType,
         object state,
@@ -19,7 +18,6 @@ internal JourneyInstance(
         bool completed = false)
     {
         _stateProvider = stateProvider ?? throw new ArgumentNullException(nameof(stateProvider));
-        JourneyName = journeyName ?? throw new ArgumentNullException(nameof(journeyName));
         StateType = stateType ?? throw new ArgumentNullException(nameof(stateType));
         InstanceId = instanceId;
         Properties = properties ?? PropertiesBuilder.CreateEmpty();
@@ -31,7 +29,7 @@ internal JourneyInstance(
 
     public bool Deleted { get; internal set; }
 
-    public string JourneyName { get; }
+    public string JourneyName => InstanceId.JourneyName;
 
     public JourneyInstanceId InstanceId { get; }
 
@@ -43,7 +41,6 @@ internal JourneyInstance(
 
     public static JourneyInstance Create(
         IUserInstanceStateProvider stateProvider,
-        string journeyName,
         JourneyInstanceId instanceId,
         Type stateType,
         object state,
@@ -55,7 +52,6 @@ public static JourneyInstance Create(
         return (JourneyInstance)Activator.CreateInstance(
             genericType,
             stateProvider,
-            journeyName,
             instanceId,
             state,
             properties,
@@ -74,7 +70,7 @@ public async Task CompleteAsync()
             throw new InvalidOperationException("Instance has been deleted.");
         }
 
-        await _stateProvider.CompleteInstanceAsync(JourneyName, InstanceId, StateType);
+        await _stateProvider.CompleteInstanceAsync(InstanceId, StateType);
         Completed = true;
     }
 
@@ -85,7 +81,7 @@ public async Task DeleteAsync()
             return;
         }
 
-        await _stateProvider.DeleteInstanceAsync(JourneyName, InstanceId, StateType);
+        await _stateProvider.DeleteInstanceAsync(InstanceId, StateType);
         Deleted = true;
     }
 
@@ -122,7 +118,7 @@ protected async Task UpdateStateAsync(object state)
             throw new InvalidOperationException("Instance has been deleted.");
         }
 
-        await _stateProvider.UpdateInstanceStateAsync(JourneyName, InstanceId, StateType, state);
+        await _stateProvider.UpdateInstanceStateAsync(InstanceId, StateType, state);
         State = state;
     }
 }
@@ -131,12 +127,11 @@ public sealed class JourneyInstance<TState> : JourneyInstance
 {
     public JourneyInstance(
         IUserInstanceStateProvider stateProvider,
-        string journeyName,
         JourneyInstanceId instanceId,
         TState state,
         IReadOnlyDictionary<object, object> properties,
         bool completed = false)
-        : base(stateProvider, journeyName, instanceId, typeof(TState), state!, properties, completed)
+        : base(stateProvider, instanceId, typeof(TState), state!, properties, completed)
     {
     }
 
diff --git a/src/FormFlow/JourneyInstanceProvider.cs b/src/FormFlow/JourneyInstanceProvider.cs
index db9a2de..5ec9716 100644
--- a/src/FormFlow/JourneyInstanceProvider.cs
+++ b/src/FormFlow/JourneyInstanceProvider.cs
@@ -42,13 +42,12 @@ public async Task<JourneyInstance> CreateInstanceAsync(
             journeyDescriptor,
             valueProvider);
 
-        if (await _stateProvider.GetInstanceAsync(journeyDescriptor.JourneyName, instanceId, journeyDescriptor.StateType) != null)
+        if (await _stateProvider.GetInstanceAsync(instanceId, journeyDescriptor.StateType) != null)
         {
             throw new InvalidOperationException("Instance already exists with this ID.");
         }
 
         return await _stateProvider.CreateInstanceAsync(
-            journeyDescriptor.JourneyName,
             instanceId,
             journeyDescriptor.StateType,
             state,
@@ -73,13 +72,12 @@ public async Task<JourneyInstance<TState>> CreateInstanceAsync<TState>(
             journeyDescriptor,
             valueProvider);
 
-        if (await _stateProvider.GetInstanceAsync(journeyDescriptor.JourneyName, instanceId, journeyDescriptor.StateType) != null)
+        if (await _stateProvider.GetInstanceAsync(instanceId, journeyDescriptor.StateType) != null)
         {
             throw new InvalidOperationException("Instance already exists with this ID.");
         }
 
         return (JourneyInstance<TState>)await _stateProvider.CreateInstanceAsync(
-            journeyDescriptor.JourneyName,
             instanceId,
             journeyDescriptor.StateType,
             state,
@@ -286,7 +284,7 @@ public bool IsCurrentInstance(ActionContext actionContext, JourneyInstanceId ins
             return null;
         }
 
-        var persistedInstance = await _stateProvider.GetInstanceAsync(journeyDescriptor.JourneyName, instanceId.Value, journeyDescriptor.StateType);
+        var persistedInstance = await _stateProvider.GetInstanceAsync(instanceId.Value, journeyDescriptor.StateType);
         if (persistedInstance == null)
         {
             return null;
diff --git a/src/FormFlow/State/IUserInstanceStateProvider.cs b/src/FormFlow/State/IUserInstanceStateProvider.cs
index e17291f..95b571d 100644
--- a/src/FormFlow/State/IUserInstanceStateProvider.cs
+++ b/src/FormFlow/State/IUserInstanceStateProvider.cs
@@ -6,18 +6,17 @@ namespace FormFlow.State;
 
 public interface IUserInstanceStateProvider
 {
-    Task CompleteInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType);
+    Task CompleteInstanceAsync(JourneyInstanceId instanceId, Type stateType);
 
     Task<JourneyInstance> CreateInstanceAsync(
-        string journeyName,
         JourneyInstanceId instanceId,
         Type stateType,
         object state,
         IReadOnlyDictionary<object, object>? properties);
 
-    Task DeleteInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType);
+    Task DeleteInstanceAsync(JourneyInstanceId instanceId, Type stateType);
 
-    Task<JourneyInstance?> GetInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType);
+    Task<JourneyInstance?> GetInstanceAsync(JourneyInstanceId instanceId, Type stateType);
 
-    Task UpdateInstanceStateAsync(string journeyName, JourneyInstanceId instanceId, Type stateType, object state);
+    Task UpdateInstanceStateAsync(JourneyInstanceId instanceId, Type stateType, object state);
 }
diff --git a/src/FormFlow/State/SessionUserInstanceStateProvider.cs b/src/FormFlow/State/SessionUserInstanceStateProvider.cs
index b64a82b..fb8ae48 100644
--- a/src/FormFlow/State/SessionUserInstanceStateProvider.cs
+++ b/src/FormFlow/State/SessionUserInstanceStateProvider.cs
@@ -23,13 +23,11 @@ public SessionUserInstanceStateProvider(
     }
 
     public Task<JourneyInstance> CreateInstanceAsync(
-        string journeyName,
         JourneyInstanceId instanceId,
         Type stateType,
         object state,
         IReadOnlyDictionary<object, object>? properties)
     {
-        ArgumentNullException.ThrowIfNull(journeyName);
         ArgumentNullException.ThrowIfNull(stateType);
         ArgumentNullException.ThrowIfNull(state);
 
@@ -39,7 +37,6 @@ public Task<JourneyInstance> CreateInstanceAsync(
 
         var entry = new SessionEntry()
         {
-            JourneyName = journeyName,
             State = serializedState,
             Properties = properties,
             Completed = false
@@ -47,12 +44,11 @@ public Task<JourneyInstance> CreateInstanceAsync(
 
         SetSessionEntry(instanceId, entry);
 
-        return Task.FromResult(JourneyInstance.Create(this, journeyName, instanceId, stateType, state, properties));
+        return Task.FromResult(JourneyInstance.Create(this, instanceId, stateType, state, properties));
     }
 
-    public Task CompleteInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType)
+    public Task CompleteInstanceAsync(JourneyInstanceId instanceId, Type stateType)
     {
-        ArgumentNullException.ThrowIfNull(journeyName);
         ArgumentNullException.ThrowIfNull(stateType);
 
         var session = GetSession();
@@ -72,9 +68,8 @@ public Task CompleteInstanceAsync(string journeyName, JourneyInstanceId instance
         return Task.CompletedTask;
     }
 
-    public Task DeleteInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType)
+    public Task DeleteInstanceAsync(JourneyInstanceId instanceId, Type stateType)
     {
-        ArgumentNullException.ThrowIfNull(journeyName);
         ArgumentNullException.ThrowIfNull(stateType);
 
         var session = GetSession();
@@ -92,9 +87,8 @@ public Task DeleteInstanceAsync(string journeyName, JourneyInstanceId instanceId
         return Task.CompletedTask;
     }
 
-    public Task<JourneyInstance?> GetInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType)
+    public Task<JourneyInstance?> GetInstanceAsync(JourneyInstanceId instanceId, Type stateType)
     {
-        ArgumentNullException.ThrowIfNull(journeyName);
         ArgumentNullException.ThrowIfNull(stateType);
 
         var session = GetSession();
@@ -107,7 +101,6 @@ public Task DeleteInstanceAsync(string journeyName, JourneyInstanceId instanceId
 
             return Task.FromResult((JourneyInstance?)JourneyInstance.Create(
                 this,
-                entry.JourneyName,
                 instanceId,
                 stateType,
                 deserializedState,
@@ -120,7 +113,7 @@ public Task DeleteInstanceAsync(string journeyName, JourneyInstanceId instanceId
         }
     }
 
-    public Task UpdateInstanceStateAsync(string journeyName, JourneyInstanceId instanceId, Type stateType, object state)
+    public Task UpdateInstanceStateAsync(JourneyInstanceId instanceId, Type stateType, object state)
     {
         var session = GetSession();
         var storeKey = GetKeyForInstance(instanceId);
@@ -167,7 +160,6 @@ private static string GetKeyForInstance(string instanceId) =>
 
     private class SessionEntry
     {
-        public string JourneyName { get; set; } = null!;
         public string State { get; set; } = null!;
         public IReadOnlyDictionary<object, object> Properties { get; set; } = null!;
         public bool Completed { get; set; }
diff --git a/test/FormFlow.Tests/EndToEndTests.cs b/test/FormFlow.Tests/EndToEndTests.cs
index 246c0be..9de2e70 100644
--- a/test/FormFlow.Tests/EndToEndTests.cs
+++ b/test/FormFlow.Tests/EndToEndTests.cs
@@ -25,7 +25,6 @@ public async Task ReadState_ReturnsStateAndProperties()
     {
         // Arrange
         var instance = await StateProvider.CreateInstanceAsync(
-            journeyName: "E2ETests",
             instanceId: GenerateInstanceId(out var id, out var subid),
             stateType: typeof(E2ETestsState),
             state: E2ETestsState.CreateInitialState(),
@@ -41,7 +40,6 @@ public async Task UpdateState_UpdatesStateAndRedirects()
     {
         // Arrange
         var instance = await StateProvider.CreateInstanceAsync(
-            journeyName: "E2ETests",
             instanceId: GenerateInstanceId(out var id, out var subid),
             stateType: typeof(E2ETestsState),
             state: E2ETestsState.CreateInitialState(),
@@ -56,7 +54,6 @@ public async Task Complete_DoesNotAllowStateToBeUpdatedSubsequently()
     {
         // Arrange
         var instance = await StateProvider.CreateInstanceAsync(
-            journeyName: "E2ETests",
             instanceId: GenerateInstanceId(out var id, out var subid),
             stateType: typeof(E2ETestsState),
             state: E2ETestsState.CreateInitialState(),
@@ -82,7 +79,6 @@ public async Task Complete_DoesAllowStateToBeReadSubsequently()
     {
         // Arrange
         var instance = await StateProvider.CreateInstanceAsync(
-            journeyName: "E2ETests",
             instanceId: GenerateInstanceId(out var id, out var subid),
             stateType: typeof(E2ETestsState),
             state: E2ETestsState.CreateInitialState(),
@@ -108,7 +104,6 @@ public async Task Delete_ReturnsOk()
     {
         // Arrange
         var instance = await StateProvider.CreateInstanceAsync(
-            journeyName: "E2ETests",
             instanceId: GenerateInstanceId(out var id, out var subid),
             stateType: typeof(E2ETestsState),
             state: E2ETestsState.CreateInitialState(),
diff --git a/test/FormFlow.Tests/Infrastructure/InMemoryInstanceStateProvider.cs b/test/FormFlow.Tests/Infrastructure/InMemoryInstanceStateProvider.cs
index 7f9e039..6eb0e78 100644
--- a/test/FormFlow.Tests/Infrastructure/InMemoryInstanceStateProvider.cs
+++ b/test/FormFlow.Tests/Infrastructure/InMemoryInstanceStateProvider.cs
@@ -11,13 +11,12 @@ public class InMemoryInstanceStateProvider : IUserInstanceStateProvider
 
     public InMemoryInstanceStateProvider()
     {
-        _instances = new Dictionary<string, Entry>();
+        _instances = new();
     }
 
     public void Clear() => _instances.Clear();
 
     public Task<JourneyInstance> CreateInstanceAsync(
-        string journeyName,
         JourneyInstanceId instanceId,
         Type stateType,
         object state,
@@ -25,7 +24,6 @@ public Task<JourneyInstance> CreateInstanceAsync(
     {
         _instances.Add(instanceId, new Entry()
         {
-            JourneyName = journeyName,
             StateType = stateType,
             State = state,
             Properties = properties
@@ -33,7 +31,6 @@ public Task<JourneyInstance> CreateInstanceAsync(
 
         var instance = JourneyInstance.Create(
             this,
-            journeyName,
             instanceId,
             stateType,
             state,
@@ -42,30 +39,30 @@ public Task<JourneyInstance> CreateInstanceAsync(
         return Task.FromResult(instance);
     }
 
-    public Task CompleteInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType)
+    public Task CompleteInstanceAsync(JourneyInstanceId instanceId, Type stateType)
     {
         _instances[instanceId].Completed = true;
         return Task.CompletedTask;
     }
 
-    public Task DeleteInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType)
+    public Task DeleteInstanceAsync(JourneyInstanceId instanceId, Type stateType)
     {
         _instances.Remove(instanceId);
         return Task.CompletedTask;
     }
 
-    public Task<JourneyInstance?> GetInstanceAsync(string journeyName, JourneyInstanceId instanceId, Type stateType)
+    public Task<JourneyInstance?> GetInstanceAsync(JourneyInstanceId instanceId, Type stateType)
     {
         _instances.TryGetValue(instanceId, out var entry);
 
         var instance = entry != null ?
-            JourneyInstance.Create(this, entry.JourneyName!, instanceId, entry.StateType!, entry.State!, entry.Properties!, entry.Completed) :
+            JourneyInstance.Create(this, instanceId, entry.StateType!, entry.State!, entry.Properties!, entry.Completed) :
             null;
 
         return Task.FromResult(instance);
     }
 
-    public Task UpdateInstanceStateAsync(string journeyName, JourneyInstanceId instanceId, Type stateType, object state)
+    public Task UpdateInstanceStateAsync(JourneyInstanceId instanceId, Type stateType, object state)
     {
         _instances[instanceId].State = state;
         return Task.CompletedTask;
@@ -73,7 +70,6 @@ public Task UpdateInstanceStateAsync(string journeyName, JourneyInstanceId insta
 
     private class Entry
     {
-        public string? JourneyName { get; set; }
         public IReadOnlyDictionary<object, object>? Properties { get; set; }
         public object? State { get; set; }
         public Type? StateType { get; set; }
diff --git a/test/FormFlow.Tests/Infrastructure/MvcTestBase.cs b/test/FormFlow.Tests/Infrastructure/MvcTestBase.cs
index 766b672..a2899bd 100644
--- a/test/FormFlow.Tests/Infrastructure/MvcTestBase.cs
+++ b/test/FormFlow.Tests/Infrastructure/MvcTestBase.cs
@@ -46,7 +46,6 @@ protected async Task<JourneyInstance<TState>> CreateInstanceAsync<TState>(
         var instanceStateProvider = Fixture.Services.GetRequiredService<IUserInstanceStateProvider>();
 
         return (JourneyInstance<TState>)await instanceStateProvider.CreateInstanceAsync(
-            journeyName,
             instanceId,
             typeof(TState),
             state,
diff --git a/test/FormFlow.Tests/JourneyInstanceProviderTests.cs b/test/FormFlow.Tests/JourneyInstanceProviderTests.cs
index 76b8aa6..a03f528 100644
--- a/test/FormFlow.Tests/JourneyInstanceProviderTests.cs
+++ b/test/FormFlow.Tests/JourneyInstanceProviderTests.cs
@@ -110,11 +110,10 @@ public async Task CreateInstanceAsync_InstanceAlreadyExists_ThrowsInvalidOperati
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -160,7 +159,6 @@ public async Task CreateInstanceAsync_CreatesInstanceInStateStore()
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
             .Setup(mock => mock.CreateInstanceAsync(
-                journeyName,
                 It.IsAny<JourneyInstanceId>(),  // FIXME
                 stateType,
                 state,
@@ -169,7 +167,6 @@ public async Task CreateInstanceAsync_CreatesInstanceInStateStore()
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -283,7 +280,7 @@ public async Task GetInstanceAsync_InstanceDoesNotExist_ReturnsNull()
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(mock => mock.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(mock => mock.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync((JourneyInstance?)null);
 
         var httpContext = new DefaultHttpContext();
@@ -321,11 +318,10 @@ public async Task GetInstanceAsync_InstanceDoesExist_ReturnsInstance()
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(mock => mock.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(mock => mock.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -376,11 +372,10 @@ public async Task GetInstanceOfT_StateTypeIsIncompatible_ThrowsInvalidOperationE
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(mock => mock.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(mock => mock.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -445,11 +440,10 @@ public async Task GetOrCreateInstanceAsync_InstanceDoesNotExist_CreatesInstanceI
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(mock => mock.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(mock => mock.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync((JourneyInstance?)null);
         stateProvider
             .Setup(mock => mock.CreateInstanceAsync(
-                journeyName,
                 It.IsAny<JourneyInstanceId>(),  // FIXME
                 stateType,
                  It.IsAny<object>(),
@@ -458,7 +452,6 @@ public async Task GetOrCreateInstanceAsync_InstanceDoesNotExist_CreatesInstanceI
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -506,7 +499,7 @@ public async Task GetOrCreateInstanceAsync_CreateStateStateTypeIsIncompatible_Th
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(mock => mock.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(mock => mock.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync((JourneyInstance?)null);
 
         var httpContext = new DefaultHttpContext();
@@ -546,11 +539,10 @@ public async Task GetOrCreateInstanceAsync_InstanceDoesExist_ReturnsExistingInst
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(mock => mock.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(mock => mock.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     originalState,
@@ -606,7 +598,7 @@ public async Task GetOrCreateInstanceOfT_CreateStateStateTypeIsIncompatible_Thro
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(mock => mock.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(mock => mock.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync((JourneyInstance?)null);
 
         var httpContext = new DefaultHttpContext();
@@ -647,11 +639,10 @@ public async Task GetOrCreateInstanceFfT_RequestedStateTypeIsIncompatible_Throws
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(mock => mock.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(mock => mock.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -826,11 +817,10 @@ public async Task ResolveCurrentInstanceAsync_CannotExtractIdForRouteValues_Retu
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -898,7 +888,7 @@ public async Task ResolveCurrentInstanceAsync_InstanceDoesNotExistInStateStore_R
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync((JourneyInstance?)null);
 
         var httpContext = new DefaultHttpContext();
@@ -933,11 +923,10 @@ public async Task ResolveCurrentInstanceAsync_MismatchingJourneyNames_ReturnsNul
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -978,11 +967,10 @@ public async Task ResolveCurrentInstanceAsync_MismatchingStateType_ReturnsNull()
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -1019,11 +1007,10 @@ public async Task ResolveCurrentInstanceAsync_InstanceExistsForRandomId_ReturnsI
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -1077,11 +1064,10 @@ public async Task ResolveCurrentInstanceAsync_InstanceExistsForRouteValues_Retur
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -1126,12 +1112,11 @@ public async Task ResolveCurrentInstanceAsync_InstanceIsDeleted_ReturnsFalse()
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(() =>
             {
                 var instance = JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
@@ -1171,11 +1156,10 @@ public async Task ResolveCurrentInstanceAsync_ReturnsSameObjectWithinSameRequest
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
         stateProvider
-            .Setup(s => s.GetInstanceAsync(journeyName, instanceId, stateType))
+            .Setup(s => s.GetInstanceAsync(instanceId, stateType))
             .ReturnsAsync(() =>
                 JourneyInstance.Create(
                     stateProvider.Object,
-                    journeyName,
                     instanceId,
                     stateType,
                     state,
diff --git a/test/FormFlow.Tests/JourneyInstanceTests.cs b/test/FormFlow.Tests/JourneyInstanceTests.cs
index 84bba33..facee5b 100644
--- a/test/FormFlow.Tests/JourneyInstanceTests.cs
+++ b/test/FormFlow.Tests/JourneyInstanceTests.cs
@@ -18,12 +18,10 @@ public async Task DeleteAsync_CallsDeleteOnStateProvider()
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
 
-        var journeyName = "journey";
         var stateType = typeof(MyState);
 
         var instance = (JourneyInstance<MyState>)JourneyInstance.Create(
             stateProvider.Object,
-            journeyName,
             instanceId,
             stateType,
             new MyState(),
@@ -35,7 +33,7 @@ public async Task DeleteAsync_CallsDeleteOnStateProvider()
         await instance.DeleteAsync();
 
         // Assert
-        stateProvider.Verify(mock => mock.DeleteInstanceAsync(journeyName, instanceId, stateType));
+        stateProvider.Verify(mock => mock.DeleteInstanceAsync(instanceId, stateType));
     }
 
     [Fact]
@@ -46,12 +44,10 @@ public async Task CompleteAsync_CallsDeleteOnStateProvider()
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
 
-        var journeyName = "journey";
         var stateType = typeof(MyState);
 
         var instance = (JourneyInstance<MyState>)JourneyInstance.Create(
             stateProvider.Object,
-            journeyName,
             instanceId,
             stateType,
             new MyState(),
@@ -63,7 +59,7 @@ public async Task CompleteAsync_CallsDeleteOnStateProvider()
         await instance.CompleteAsync();
 
         // Assert
-        stateProvider.Verify(mock => mock.CompleteInstanceAsync(journeyName, instanceId, stateType));
+        stateProvider.Verify(mock => mock.CompleteInstanceAsync(instanceId, stateType));
     }
 
     [Fact]
@@ -74,12 +70,10 @@ public async Task UpdateStateAsync_DeletedInstance_ThrowsInvalidOperationExcepti
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
 
-        var journeyName = "journey";
         var stateType = typeof(MyState);
 
         var instance = (JourneyInstance<MyState>)JourneyInstance.Create(
             stateProvider.Object,
-            journeyName,
             instanceId,
             stateType,
             new MyState(),
@@ -104,12 +98,10 @@ public async Task UpdateStateAsync_CallsUpdateStateOnStateProvider()
 
         var stateProvider = new Mock<IUserInstanceStateProvider>();
 
-        var journeyName = "journey";
         var stateType = typeof(MyState);
 
         var instance = (JourneyInstance<MyState>)JourneyInstance.Create(
             stateProvider.Object,
-            journeyName,
             instanceId,
             stateType,
             new MyState(),
@@ -121,7 +113,7 @@ public async Task UpdateStateAsync_CallsUpdateStateOnStateProvider()
         await instance.UpdateStateAsync(newState);
 
         // Assert
-        stateProvider.Verify(mock => mock.UpdateInstanceStateAsync(journeyName, instanceId, stateType, newState));
+        stateProvider.Verify(mock => mock.UpdateInstanceStateAsync(instanceId, stateType, newState));
         Assert.Same(newState, instance.State);
     }