diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ec18f14dd1..0412dfe3f6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,3 +43,11 @@ jobs:
           retention-days: 7
       - name: Run tests
         uses: Particular/run-tests-action@v1.7.0
+  repo-integrity:
+    name: Repo integrity
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.1
+      - name: Repo integrity tests
+        uses: Particular/repo-integrity-action@main
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b8fe792987..434754bf48 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -22,6 +22,8 @@ jobs:
         uses: actions/setup-dotnet@v4.0.0
         with:
           dotnet-version: 8.0.x
+      - name: Repo integrity tests
+        uses: Particular/repo-integrity-action@main
       - name: Build
         run: dotnet build src --configuration Release
       - name: Sign NuGet packages
diff --git a/src/NServiceBus.ContainerTests/NServiceBus.ContainerTests.csproj b/src/NServiceBus.ContainerTests/NServiceBus.ContainerTests.csproj
index fc84ae2c3b..e55644a83b 100644
--- a/src/NServiceBus.ContainerTests/NServiceBus.ContainerTests.csproj
+++ b/src/NServiceBus.ContainerTests/NServiceBus.ContainerTests.csproj
@@ -10,6 +10,10 @@
     <ProjectReference Include="..\NServiceBus.Core\NServiceBus.Core.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="NServiceBus.MessageInterfaces" Version="1.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="GitHubActionsTestLogger" Version="2.3.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
diff --git a/src/NServiceBus.Core.Analyzer.Tests.Roslyn4/NServiceBus.Core.Analyzer.Tests.Roslyn4.csproj b/src/NServiceBus.Core.Analyzer.Tests.Roslyn4/NServiceBus.Core.Analyzer.Tests.Roslyn4.csproj
index 10332195fc..86f687647d 100644
--- a/src/NServiceBus.Core.Analyzer.Tests.Roslyn4/NServiceBus.Core.Analyzer.Tests.Roslyn4.csproj
+++ b/src/NServiceBus.Core.Analyzer.Tests.Roslyn4/NServiceBus.Core.Analyzer.Tests.Roslyn4.csproj
@@ -11,6 +11,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.8.0" />
+    <PackageReference Include="NServiceBus.MessageInterfaces" Version="1.0.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/NServiceBus.Core.Tests/NServiceBus.Core.Tests.csproj b/src/NServiceBus.Core.Tests/NServiceBus.Core.Tests.csproj
index 4b65057863..1916071343 100644
--- a/src/NServiceBus.Core.Tests/NServiceBus.Core.Tests.csproj
+++ b/src/NServiceBus.Core.Tests/NServiceBus.Core.Tests.csproj
@@ -11,6 +11,10 @@
     <ProjectReference Include="..\NServiceBus.Testing.Fakes\NServiceBus.Testing.Fakes.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="NServiceBus.MessageInterfaces" Version="1.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="GitHubActionsTestLogger" Version="2.3.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
diff --git a/src/NServiceBus.Learning.AcceptanceTests/NServiceBus.Learning.AcceptanceTests.csproj b/src/NServiceBus.Learning.AcceptanceTests/NServiceBus.Learning.AcceptanceTests.csproj
index ebcd26caac..d5266f9d6e 100644
--- a/src/NServiceBus.Learning.AcceptanceTests/NServiceBus.Learning.AcceptanceTests.csproj
+++ b/src/NServiceBus.Learning.AcceptanceTests/NServiceBus.Learning.AcceptanceTests.csproj
@@ -9,9 +9,14 @@
     <ProjectReference Include="..\NServiceBus.Core\NServiceBus.Core.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="NServiceBus.MessageInterfaces" Version="1.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="GitHubActionsTestLogger" Version="2.3.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+    <PackageReference Include="NUnit" Version="3.14.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="Particular.Approvals" Version="1.0.0" />
   </ItemGroup>