diff --git a/wolverine/a-frame-architecture/FinancialApi.Application.UnitTests/ApplyFeeHandlerTests.cs b/wolverine/a-frame-architecture/FinancialApi.Application.UnitTests/ApplyFeeHandlerTests.cs
new file mode 100644
index 0000000..7292a17
--- /dev/null
+++ b/wolverine/a-frame-architecture/FinancialApi.Application.UnitTests/ApplyFeeHandlerTests.cs
@@ -0,0 +1,30 @@
+using FinancialApi.Domain;
+using FluentAssertions;
+using FluentAssertions.Execution;
+
+namespace FinancialApi.Application.UnitTests;
+
+public class ApplyFeeHandlerTests
+{
+    [Fact]
+    public void GivenValidAccounts_BasicFee_ShouldValidateEverything()
+    {
+        // Arrange
+        var command = new ApplyFeeCommand(1, 100);
+        var account = new Account(1, 100, "Debit");
+        var destAccount = new Account(99999, 100, "Credit");
+        var pair = new FeePair(account, destAccount, TimeProvider.System.GetUtcNow());
+        
+        // Act
+        var intents = ApplyFeeHandler.Handle(command, pair);
+
+        // Assert
+        using var _ = new AssertionScope();
+        intents.CustomerWrite.Entity.Balance.Should().Be(0);
+        intents.RevenueWrite.Entity.Balance.Should().Be(200);
+        intents.RevenueWrite.Entity.Balance.Should().Be(200);
+        intents.JournalWrite.Entity.Lines.Count.Should().Be(2);
+        intents.Event.AccountId.Should().Be(account.Id);
+        intents.Event.Amount.Should().Be(100);
+    }
+}
\ No newline at end of file
diff --git a/wolverine/a-frame-architecture/FinancialApi.Application.UnitTests/FinancialApi.Application.UnitTests.csproj b/wolverine/a-frame-architecture/FinancialApi.Application.UnitTests/FinancialApi.Application.UnitTests.csproj
new file mode 100644
index 0000000..6bd4a6c
--- /dev/null
+++ b/wolverine/a-frame-architecture/FinancialApi.Application.UnitTests/FinancialApi.Application.UnitTests.csproj
@@ -0,0 +1,34 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net10.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <IsPackable>false</IsPackable>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="coverlet.collector" Version="6.0.4"/>
+        <PackageReference Include="FluentAssertions" Version="8.10.0" />
+        <PackageReference Include="JasperFx" Version="2.27.0" />
+        <PackageReference Include="Microsoft.Extensions.TimeProvider.Testing" Version="10.6.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1"/>
+        <PackageReference Include="xunit" Version="2.9.3"/>
+        <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <Using Include="Xunit"/>
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\FinancialApi.Application\FinancialApi.Application.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <Reference Include="Wolverine">
+        <HintPath>..\..\..\..\..\..\.nuget\packages\wolverinefx\6.18.0\lib\net10.0\Wolverine.dll</HintPath>
+      </Reference>
+    </ItemGroup>
+
+</Project>
\ No newline at end of file
diff --git a/wolverine/a-frame-architecture/a-frame-architecture.sln b/wolverine/a-frame-architecture/a-frame-architecture.sln
index 7ac1c44..8dcd001 100644
--- a/wolverine/a-frame-architecture/a-frame-architecture.sln
+++ b/wolverine/a-frame-architecture/a-frame-architecture.sln
@@ -10,6 +10,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FinancialApi.Infrastructure
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FinancialApi.Domain", "FinancialApi.Domain\FinancialApi.Domain.csproj", "{2DB493D2-1C96-4F7C-9AB6-2846A92860B9}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FinancialApi.Application.UnitTests", "FinancialApi.Application.UnitTests\FinancialApi.Application.UnitTests.csproj", "{93DBA3AA-3C03-431C-A41C-DDADFAC964D5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -36,5 +38,9 @@ Global
 		{2DB493D2-1C96-4F7C-9AB6-2846A92860B9}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{2DB493D2-1C96-4F7C-9AB6-2846A92860B9}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{2DB493D2-1C96-4F7C-9AB6-2846A92860B9}.Release|Any CPU.Build.0 = Release|Any CPU
+		{93DBA3AA-3C03-431C-A41C-DDADFAC964D5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{93DBA3AA-3C03-431C-A41C-DDADFAC964D5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{93DBA3AA-3C03-431C-A41C-DDADFAC964D5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{93DBA3AA-3C03-431C-A41C-DDADFAC964D5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal
diff --git a/wolverine/a-frame-architecture/a-frame-architecture.sln.DotSettings.user b/wolverine/a-frame-architecture/a-frame-architecture.sln.DotSettings.user
index 6108694..40f1a89 100644
--- a/wolverine/a-frame-architecture/a-frame-architecture.sln.DotSettings.user
+++ b/wolverine/a-frame-architecture/a-frame-architecture.sln.DotSettings.user
@@ -1,3 +1,7 @@
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+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ALateBoundTestFramework_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002Econfig_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FSourcesCache_003Fcffa676d9bfc6c7a1c9d0d25ead15b3b0c9e12e3187bf397eaa52260e5fd91_003FLateBoundTestFramework_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AWolverineRuntime_002EHostService_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002Econfig_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FSourcesCache_003F97bae8f1ffdd86c14edef353d7a85d3d3773b56c68e3a62e8815d1afaacbe797_003FWolverineRuntime_002EHostService_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/Environment/UnitTesting/UnitTestSessionStore/Sessions/=b53aee56_002D76e6_002D4473_002D9a54_002Dc62cf61dc263/@EntryIndexedValue">&lt;SessionState ContinuousTestingMode="0" IsActive="True" Name="Test1" xmlns="urn:schemas-jetbrains-com:jetbrains-ut-session"&gt;
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\ No newline at end of file