diff --git a/.github/workflows/build-debug.yml b/.github/workflows/build-debug.yml
index d409df8..2d5ebbc 100644
--- a/.github/workflows/build-debug.yml
+++ b/.github/workflows/build-debug.yml
@@ -25,8 +25,8 @@ jobs:
         with:
           dotnet-version: ${{ env.DOTNET_SDK_VERSION }}
           include-prerelease: ${{ env.DOTNET_INCLUDE_PRERELEASE }}
-      - run: dotnet build -c Debug
-      - run: dotnet test -c Debug --no-build < /dev/null
+      - run: dotnet build ObservableCollection.WithoutSandbox.slnf -c Debug
+      - run: dotnet test ObservableCollection.WithoutSandbox.slnf -c Debug --no-build < /dev/null
 
   build-unity:
     if: "((github.event_name == 'push' && github.repository_owner == 'Cysharp') || startsWith(github.event.pull_request.head.label, 'Cysharp:'))"
diff --git a/OnlySln.slnf b/ObservableCollection.WithoutSandbox.slnf
similarity index 52%
rename from OnlySln.slnf
rename to ObservableCollection.WithoutSandbox.slnf
index 00b2b3b..a09d925 100644
--- a/OnlySln.slnf
+++ b/ObservableCollection.WithoutSandbox.slnf
@@ -2,7 +2,9 @@
   "solution": {
     "path": "ObservableCollections.sln",
     "projects": [
-      "src\\ObservableCollections\\ObservableCollections.csproj"
+      "src\\ObservableCollections\\ObservableCollections.csproj",
+      "tests\\ObservableCollections.Tests\\ObservableCollections.Tests.csproj",
+      "tools\\PostBuildUtility\\PostBuildUtility.csproj"
     ]
   }
 }
\ No newline at end of file
diff --git a/src/ObservableCollections.Unity/Assets/Plugins/System.Buffers.dll b/src/ObservableCollections.Unity/Assets/Plugins/System.Buffers.dll
new file mode 100644
index 0000000..b6d9c77
Binary files /dev/null and b/src/ObservableCollections.Unity/Assets/Plugins/System.Buffers.dll differ
diff --git a/src/ObservableCollections.Unity/Assets/Plugins/System.Memory.dll b/src/ObservableCollections.Unity/Assets/Plugins/System.Memory.dll
new file mode 100644
index 0000000..bdfc501
Binary files /dev/null and b/src/ObservableCollections.Unity/Assets/Plugins/System.Memory.dll differ
diff --git a/src/ObservableCollections.Unity/Assets/Plugins/System.Runtime.CompilerServices.Unsafe.dll b/src/ObservableCollections.Unity/Assets/Plugins/System.Runtime.CompilerServices.Unsafe.dll
new file mode 100644
index 0000000..3156239
Binary files /dev/null and b/src/ObservableCollections.Unity/Assets/Plugins/System.Runtime.CompilerServices.Unsafe.dll differ