diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index fec32a6db..bd3318b99 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -6,6 +6,10 @@ on:
       - docs/**
       - '*.md'
 
+concurrency:
+  group: pr-build-and-test-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   event_file:
     name: "Event File"
@@ -17,16 +21,15 @@ jobs:
           name: Event File
           path: ${{ github.event_path }}
 
-  build-and-test:
-    name: "Build and test"
+  unit-tests:
+    # Container-less test projects. Run across all target frameworks — these exercise the
+    # library code paths, so multi-TFM coverage matters here. No Docker needed.
+    name: "Build and test core (${{ matrix.dotnet-version }})"
     runs-on: ubuntu-latest
-#    runs-on: [ self-hosted, type-cpx52, setup-docker, volume-cache-50GB ]
     strategy:
+      fail-fast: false
       matrix:
         dotnet-version: [ '8.0', '9.0', '10.0' ]
-#    env:
-#      NUGET_PACKAGES: "/mnt/cache/.nuget/packages"
-#      DOTNET_INSTALL_DIR: "/mnt/cache/.dotnet"
     steps:
       -
         name: Checkout
@@ -40,23 +43,98 @@ jobs:
             9.0.x
             10.0.x
       -
-        name: Login to Docker Hub
-        if: ${{ github.event.pull_request.head.repo.fork == false }}
-        uses: docker/login-action@v4
+        name: Run tests
+        run: |
+          set -euo pipefail
+          projects="
+            src/Core/test/Eventuous.Tests/Eventuous.Tests.csproj
+            src/Core/test/Eventuous.Tests.Application/Eventuous.Tests.Application.csproj
+            src/Core/test/Eventuous.Tests.Subscriptions/Eventuous.Tests.Subscriptions.csproj
+            src/Core/test/Eventuous.Tests.Shared.Analyzers/Eventuous.Tests.Shared.Analyzers.csproj
+            src/Extensions/test/Eventuous.Tests.DependencyInjection/Eventuous.Tests.DependencyInjection.csproj
+            src/Extensions/test/Eventuous.Tests.Extensions.AspNetCore/Eventuous.Tests.Extensions.AspNetCore.csproj
+            src/Extensions/test/Eventuous.Tests.Extensions.AspNetCore.Analyzers/Eventuous.Tests.Extensions.AspNetCore.Analyzers.csproj
+            src/Gateway/test/Eventuous.Tests.Gateway/Eventuous.Tests.Gateway.csproj
+            src/Experimental/test/Eventuous.Tests.Spyglass/Eventuous.Tests.Spyglass.csproj
+            src/Experimental/test/Eventuous.Tests.Spyglass.Generators/Eventuous.Tests.Spyglass.Generators.csproj
+            src/Sqlite/test/Eventuous.Tests.Sqlite/Eventuous.Tests.Sqlite.csproj
+            src/SignalR/test/Eventuous.Tests.SignalR/Eventuous.Tests.SignalR.csproj
+          "
+          for proj in $projects; do
+            echo "::group::dotnet test $proj (net${{ matrix.dotnet-version }})"
+            dotnet test "$proj" -c "Debug CI" -f net${{ matrix.dotnet-version }}
+            echo "::endgroup::"
+          done
+      -
+        name: Upload Test Results
+        if: always()
+        uses: actions/upload-artifact@v7
         with:
-          username: ${{ secrets.DOCKER_USER }}
-          password: ${{ secrets.DOCKER_TOKEN }}
+          name: Test Results core ${{ matrix.dotnet-version }}
+          path: |
+            test-results/**/*.xml
+            test-results/**/*.trx
+            test-results/**/*.json
+
+  integration-tests:
+    # One job per provider so a single runner only ever starts one container family — running
+    # the whole solution on one runner stacked KurrentDB + Postgres + SQL Server + Mongo + Kafka
+    # + RabbitMQ containers at once and made container startup (and the tests) flaky.
+    #
+    # Integration suites run on a single TFM: the DB adapter behaves the same across runtimes, so
+    # multi-TFM runs mostly re-pull the same images for little extra signal. max-parallel throttles
+    # concurrent Docker Hub image pulls to stay under the pull rate limit.
+    #
+    # When adding a new integration test project (one that uses Testcontainers), add a suite entry.
+    name: "Build and test ${{ matrix.suite.name }}"
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      max-parallel: 4
+      matrix:
+        suite:
+          - name: kurrentdb
+            project: src/KurrentDB/test/Eventuous.Tests.KurrentDB/Eventuous.Tests.KurrentDB.csproj
+          - name: postgres
+            project: src/Postgres/test/Eventuous.Tests.Postgres/Eventuous.Tests.Postgres.csproj
+          - name: sqlserver
+            project: src/SqlServer/test/Eventuous.Tests.SqlServer/Eventuous.Tests.SqlServer.csproj
+          - name: mongo
+            project: src/Mongo/test/Eventuous.Tests.Projections.MongoDB/Eventuous.Tests.Projections.MongoDB.csproj
+          - name: kafka
+            project: src/Kafka/test/Eventuous.Tests.Kafka/Eventuous.Tests.Kafka.csproj
+          - name: rabbitmq
+            project: src/RabbitMq/test/Eventuous.Tests.RabbitMq/Eventuous.Tests.RabbitMq.csproj
+          - name: redis
+            project: src/Redis/test/Eventuous.Tests.Redis/Eventuous.Tests.Redis.csproj
+          - name: azure-servicebus
+            project: src/Azure/test/Eventuous.Tests.Azure.ServiceBus/Eventuous.Tests.Azure.ServiceBus.csproj
+          - name: googlepubsub
+            project: src/GooglePubSub/test/Eventuous.Tests.GooglePubSub/Eventuous.Tests.GooglePubSub.csproj
+          - name: signalr-integration
+            project: src/SignalR/test/Eventuous.Tests.SignalR.Integration/Eventuous.Tests.SignalR.Integration.csproj
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v7
+      -
+        name: Setup .NET
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: |
+            8.0.x
+            9.0.x
+            10.0.x
       -
         name: Run tests
-        run: |
-          dotnet test -c "Debug CI" -f net${{ matrix.dotnet-version }}
+        run: dotnet test "${{ matrix.suite.project }}" -c "Debug CI" -f net10.0
       -
         name: Upload Test Results
         if: always()
         uses: actions/upload-artifact@v7
         with:
-          name: Test Results ${{ matrix.dotnet-version }}
+          name: Test Results ${{ matrix.suite.name }}
           path: |
             test-results/**/*.xml
             test-results/**/*.trx
-            test-results/**/*.json
\ No newline at end of file
+            test-results/**/*.json
diff --git a/src/Postgres/test/Eventuous.Tests.Postgres/Limiter.cs b/src/Postgres/test/Eventuous.Tests.Postgres/Limiter.cs
new file mode 100644
index 000000000..450f26ec2
--- /dev/null
+++ b/src/Postgres/test/Eventuous.Tests.Postgres/Limiter.cs
@@ -0,0 +1,10 @@
+using Eventuous.Tests.Postgres;
+using TUnit.Core.Interfaces;
+
+[assembly: ParallelLimiter<Limiter>]
+
+namespace Eventuous.Tests.Postgres;
+
+public class Limiter : IParallelLimit {
+    public int Limit => 4;
+}