[release/9.0] BinaryFormatter tests improvements (#107540)

* Remove package references from library tests (#106737) * Remove package references from library tests These tests should be referencing the product assemblies so that they test latest and not old bits. * Reference the OOB version of SRSF and make sure it's copied * BinaryFormatter tests should be skipped only on AOT, WASM and Mobile (#106858) * respect AppContext switch (which is currently enabled for all projects in the root Directory.Build.props file) * add project reference to all test projects that need working BF (and were being skipped for a while) * adjust to changes from #104202: EqualityComparer<string>.Default is mapped to StringEqualityComparer, but serialized as GenericEqualityComparer<string> * Don't use WeakReferences in the round trip test, as the target may get freed in the meantime, fixes #104905 (#106967) * Enable more BinaryFormatter tests (#107408) * enable the BinaryFormatter tests in System.Runtime.Serialization.Formatters.Tests * add new test project, where the flag is disabled and it runs only 3 tests in total that ensure that * The SerializationGuard is no longer activated since BF was moved to the OOB package, the tests need to reflect that. * Disable binary formatter tests when DotNetBuildSourceOnly. (#107549) * [mono][tvos] Do not treat assembly.pdb/xml files as native files to bundle when AOTing on Helix (#107079) * Do not treat assembly.pdb/xml files as native files to bundle * Bundle satellite assemblies as well * [mono][ci] Include PDBs from runtime pack when building on Helix if required (#107348) --------- Co-authored-by: Eric StJohn <ericstj@microsoft.com> Co-authored-by: Tom Deseyn <tom.deseyn@gmail.com> Co-authored-by: Ivan Povazan <55002338+ivanpovazan@users.noreply.github.com>
dotnet · Sep 17, 2024 · 34b0d9d · 34b0d9d
1 parent 7832c5d
commit 34b0d9d
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Showing 39 changed files with 223 additions and 147 deletions.
diff --git a/Directory.Build.props b/Directory.Build.props
@@ -473,6 +473,8 @@
   <PropertyGroup Condition="'$(IsTestProject)' == 'true' or '$(IsTestSupportProject)' == 'true' or '$(IsTrimmingTestProject)' == 'true'">
     <!-- we need to re-enable BinaryFormatter within test projects since some tests exercise these code paths to ensure compat -->
     <EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
+    <!-- For DotNetBuildSourceOnly, only the bundled BinaryFormatter is built which does not support serialization. -->
+    <EnableUnsafeBinaryFormatterSerialization Condition="'$(DotNetBuildSourceOnly)' == 'true'">false</EnableUnsafeBinaryFormatterSerialization>
     <!-- don't warn on usage of BinaryFormatter or legacy serialization infrastructure from test projects -->
     <NoWarn>$(NoWarn);SYSLIB0011;SYSLIB0050;SYSLIB0051</NoWarn>
     <!-- don't warn about unnecessary trim warning suppressions. can be removed with preview 6. -->

diff --git a/eng/Versions.props b/eng/Versions.props
@@ -163,8 +163,6 @@
     <MicrosoftDiaSymReaderVersion>2.0.0</MicrosoftDiaSymReaderVersion>
     <MicrosoftDiaSymReaderNativeVersion>17.10.0-beta1.24272.1</MicrosoftDiaSymReaderNativeVersion>
     <SystemCommandLineVersion>2.0.0-beta4.24324.3</SystemCommandLineVersion>
-    <!-- This package provides working implementation of BinaryFormatter and is used only by test projects -->
-    <SystemRuntimeSerializationFormattersVersion>9.0.0-preview.7.24327.2</SystemRuntimeSerializationFormattersVersion>
     <TraceEventVersion>3.1.7</TraceEventVersion>
     <NETStandardLibraryRefVersion>2.1.0</NETStandardLibraryRefVersion>
     <NetStandardLibraryVersion>2.0.3</NetStandardLibraryVersion>

diff --git a/eng/references.targets b/eng/references.targets
@@ -39,7 +39,7 @@
     <ItemGroup>
       <ProjectReferenceWithConfiguration PrivateAssets="all"
                                          Private="false"
-                                         Condition="$(NetCoreAppLibrary.Contains('%(Filename);'))" />
+                                         Condition="$(NetCoreAppLibrary.Contains('%(Filename);')) and '%(ProjectReferenceWithConfiguration.Private)' == ''" />
     </ItemGroup>
   </Target>
 

diff --git a/eng/testing/tests.ioslike.targets b/eng/testing/tests.ioslike.targets
@@ -71,6 +71,7 @@
       <BundleFiles Condition="'%(AppleAssembliesToBundle._IsNative)' != 'true'"
                    Include="@(AppleAssembliesToBundle)"         TargetDir="publish\%(AppleAssembliesToBundle.RecursiveDir)" />
       <BundleFiles Include="@(AppleNativeFilesToBundle)"        TargetDir="publish\%(AppleNativeFilesToBundle.RecursiveDir)" />
+      <BundleFiles Include="@(_SatelliteAssemblies)"            TargetDir="publish\%(_SatelliteAssemblies.RecursiveDir)" />
       <BundleFiles Include="$(RuntimeConfigFilePath)"           TargetDir="publish" />
 
       <BundleFiles Include="$(MonoProjectRoot)\msbuild\apple\data\*" TargetDir="publish" />
@@ -93,8 +94,7 @@
 
     <ItemGroup Condition="'$(DebuggerSupport)' == 'true'">
       <!-- Add any pdb files, if available -->
-      <_BundlePdbFiles Include="$([System.IO.Path]::ChangeExtension('%(AppleAssembliesToBundle.Identity)', '.pdb'))" />
-      <BundleFiles Include="@(_BundlePdbFiles)" TargetDir="publish" Condition="Exists(%(_BundlePdbFiles.Identity))" />
+      <BundleFiles Include="@(ApplePdbsToBundle)" TargetDir="publish" Condition="Exists(%(ApplePdbsToBundle.Identity))" />
     </ItemGroup>
 
     <Copy SourceFiles="@(BundleFiles)"         DestinationFolder="$(BundleDir)%(TargetDir)" />
@@ -213,7 +213,10 @@
         <_IsNative>false</_IsNative>
       </AppleAssembliesToBundle>
 
-      <AppleNativeFilesToBundle Include="$(PublishDir)\**\*.*" Exclude="$(PublishDir)\*.dll" />
+      <ApplePdbsToBundle Include="$([System.IO.Path]::ChangeExtension('%(AppleAssembliesToBundle.Identity)', '.pdb'))" />
+      <AppleXmlsToBundle Include="$([System.IO.Path]::ChangeExtension('%(AppleAssembliesToBundle.Identity)', '.xml'))" />
+
+      <AppleNativeFilesToBundle Include="$(PublishDir)\**\*.*" Exclude="@(AppleAssembliesToBundle);@(ApplePdbsToBundle);@(AppleXmlsToBundle);@(_SatelliteAssemblies)" />
     </ItemGroup>
   </Target>
 

diff --git a/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs b/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs
@@ -736,22 +736,8 @@ private static bool DetermineBinaryFormatterSupport()
                 return false;
             }
 
-            Assembly assembly = typeof(System.Runtime.Serialization.Formatters.Binary.BinaryFormatter).Assembly;
-            AssemblyName name = assembly.GetName();
-            Version assemblyVersion = name.Version;
-
-            bool isSupported = true;
-
-            // Version 8.1 is the version in the shared runtime (.NET 9+) that has the type disabled with no config.
-            // Assembly versions beyond 8.1 are the fully functional version from NuGet.
-            // Assembly versions before 8.1 probably won't be encountered, since that's the past.
-
-            if (assemblyVersion.Major == 8 && assemblyVersion.Minor == 1)
-            {
-                isSupported = false;
-            }
-
-            return isSupported;
+            return AppContext.TryGetSwitch("System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization", out bool isBinaryFormatterEnabled)
+                && isBinaryFormatterEnabled;
         }
     }
 }
diff --git a/...crosoft.Extensions.Hosting/tests/UnitTests/Microsoft.Extensions.Hosting.Unit.Tests.csproj b/...crosoft.Extensions.Hosting/tests/UnitTests/Microsoft.Extensions.Hosting.Unit.Tests.csproj
@@ -19,4 +19,11 @@
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.Hosting\src\Microsoft.Extensions.Hosting.csproj" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' != '.NETFramework'">
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
+  </ItemGroup>
+
 </Project>
diff --git a/src/libraries/System.Collections.NonGeneric/tests/System.Collections.NonGeneric.Tests.csproj b/src/libraries/System.Collections.NonGeneric/tests/System.Collections.NonGeneric.Tests.csproj
@@ -44,5 +44,10 @@
     <Compile Include="CaseInsensitiveHashCodeProviderTests.cs" />
     <Compile Include="$(CommonTestPath)System\Collections\IEnumerable.NonGeneric.Serialization.Tests.cs"
              Link="Common\System\Collections\IEnumerable.NonGeneric.Serialization.Tests.cs" />
+
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 </Project>
diff --git a/...ibraries/System.Collections.Specialized/tests/System.Collections.Specialized.Tests.csproj b/...ibraries/System.Collections.Specialized/tests/System.Collections.Specialized.Tests.csproj
@@ -75,5 +75,10 @@
     <Compile Include="$(CommonTestPath)System\Collections\IEnumerable.NonGeneric.Serialization.Tests.cs"
              Link="Common\System\Collections\IEnumerable.NonGeneric.Serialization.Tests.cs" />
     <Compile Include="NameObjectCollectionBase\NameObjectCollectionBase.ConstructorTests.cs" />
+
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 </Project>
diff --git a/src/libraries/System.Collections/tests/Generic/Dictionary/Dictionary.Tests.cs b/src/libraries/System.Collections/tests/Generic/Dictionary/Dictionary.Tests.cs
@@ -452,6 +452,13 @@ private static void TestComparerSerialization<T>(IEqualityComparer<T> equalityCo
             s.Position = 0;
             dict = (Dictionary<T, T>)bf.Deserialize(s);
 
+            if (equalityComparer.Equals(EqualityComparer<string>.Default))
+            {
+                // EqualityComparer<string>.Default is mapped to StringEqualityComparer, but serialized as GenericEqualityComparer<string>
+                Assert.Equal("System.Collections.Generic.GenericEqualityComparer`1[System.String]", dict.Comparer.GetType().ToString());
+                return;
+            }
+
             if (internalTypeName == null)
             {
                 Assert.IsType(equalityComparer.GetType(), dict.Comparer);

diff --git a/src/libraries/System.Collections/tests/Generic/HashSet/HashSet.Generic.Tests.cs b/src/libraries/System.Collections/tests/Generic/HashSet/HashSet.Generic.Tests.cs
@@ -886,6 +886,13 @@ static void TestComparerSerialization<TCompared>(IEqualityComparer<TCompared> eq
                 s.Position = 0;
                 set = (HashSet<TCompared>)bf.Deserialize(s);
 
+                if (equalityComparer.Equals(EqualityComparer<string>.Default))
+                {
+                    // EqualityComparer<string>.Default is mapped to StringEqualityComparer, but serialized as GenericEqualityComparer<string>
+                    Assert.Equal("System.Collections.Generic.GenericEqualityComparer`1[System.String]", set.Comparer.GetType().ToString());
+                    return;
+                }
+
                 if (internalTypeName == null)
                 {
                     Assert.IsType(equalityComparer.GetType(), set.Comparer);

diff --git a/src/libraries/System.Collections/tests/System.Collections.Tests.csproj b/src/libraries/System.Collections/tests/System.Collections.Tests.csproj
@@ -4,6 +4,12 @@
     <TestRuntime>true</TestRuntime>
     <DebuggerSupport Condition="'$(DebuggerSupport)' == '' and ('$(TargetOS)' == 'browser' or '$(TargetOS)' == 'wasi')">true</DebuggerSupport>
   </PropertyGroup>
+  <ItemGroup>
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
+  </ItemGroup>
   <ItemGroup>
     <RdXmlFile Include="default.rd.xml" />
   </ItemGroup>

diff --git a/...es/System.ComponentModel.Annotations/tests/System.ComponentModel.Annotations.Tests.csproj b/...es/System.ComponentModel.Annotations/tests/System.ComponentModel.Annotations.Tests.csproj
@@ -48,5 +48,10 @@
     <Compile Include="System\ComponentModel\DataAnnotations\ValidationResultTests.cs" />
     <Compile Include="System\ComponentModel\DataAnnotations\ValidatorTests.cs" />
     <Compile Include="System\ComponentModel\DataAnnotations\DeniedValuesAttributeTests.cs" />
+
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 </Project>
diff --git a/...ries/System.ComponentModel.Primitives/tests/System.ComponentModel.Primitives.Tests.csproj b/...ries/System.ComponentModel.Primitives/tests/System.ComponentModel.Primitives.Tests.csproj
@@ -26,5 +26,10 @@
     <Compile Include="System\ComponentModel\ParenthesizePropertyNameAttributeTests.cs" />
     <Compile Include="System\ComponentModel\ReadOnlyAttributeTests.cs" />
     <Compile Include="System\ComponentModel\RefreshPropertiesAttributeTests.cs" />
+
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 </Project>
diff --git a/...ystem.ComponentModel.TypeConverter/tests/System.ComponentModel.TypeConverter.Tests.csproj b/...ystem.ComponentModel.TypeConverter/tests/System.ComponentModel.TypeConverter.Tests.csproj
@@ -166,6 +166,10 @@
   <ItemGroup>
     <PackageReference Include="System.ComponentModel.TypeConverter.TestData" Version="$(SystemComponentModelTypeConverterTestDataVersion)" />
     <PackageReference Include="Moq" Version="$(MoqVersion)" />
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="Resources\TestResx.resx">

diff --git a/...uration.ConfigurationManager/tests/System.Configuration.ConfigurationManager.Tests.csproj b/...uration.ConfigurationManager/tests/System.Configuration.ConfigurationManager.Tests.csproj
@@ -107,4 +107,10 @@
     <!-- Manually reference the transitive dependency to make NuGet pick the package over the transitive project: https://github.com/NuGet/Home/issues/10368 -->
     <PackageReference Include="System.Security.Principal.Windows" Version="$(SystemSecurityPrincipalWindowsVersion)" PrivateAssets="all" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' != '.NETFramework'">
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
+  </ItemGroup>
 </Project>
diff --git a/src/libraries/System.Data.Common/tests/System.Data.Common.Tests.csproj b/src/libraries/System.Data.Common/tests/System.Data.Common.Tests.csproj
@@ -118,6 +118,11 @@
              Link="Common\System\Diagnostics\Tracing\TestEventListener.cs" />
     <Compile Include="$(CommonTestPath)System\Runtime\Serialization\Formatters\BinaryFormatterHelpers.cs"
              Link="Common\System\Runtime\Serialization\Formatters\BinaryFormatterHelpers.cs" />
+
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
   <!-- S.D.SqlClient isn't live built anymore. -->
   <ItemGroup>

diff --git a/src/libraries/System.Formats.Nrbf/tests/System.Formats.Nrbf.Tests.csproj b/src/libraries/System.Formats.Nrbf/tests/System.Formats.Nrbf.Tests.csproj
@@ -15,11 +15,14 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
-    <PackageReference Include="System.Text.Json" Version="$(SystemTextJsonVersion)" />
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\src\System.Text.Json.csproj" />
   </ItemGroup>
-  
+
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' != '.NETFramework'">
-    <PackageReference Include="System.Runtime.Serialization.Formatters" Version="$(SystemRuntimeSerializationFormattersVersion)" />
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 
 </Project>
diff --git a/src/libraries/System.Net.Http/tests/FunctionalTests/System.Net.Http.Functional.Tests.csproj b/src/libraries/System.Net.Http/tests/FunctionalTests/System.Net.Http.Functional.Tests.csproj
@@ -331,11 +331,9 @@
   <ItemGroup>
     <PackageReference Include="System.Net.TestData" Version="$(SystemNetTestDataVersion)" />
     <ProjectReference Include="$(LibrariesProjectRoot)System.DirectoryServices.Protocols\src\System.DirectoryServices.Protocols.csproj" />
+    <ProjectReference Include="$(LibrariesProjectRoot)System.IO.Pipelines\src\System.IO.Pipelines.csproj" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(CommonTestPath)StreamConformanceTests\StreamConformanceTests.csproj" />
   </ItemGroup>
-  <ItemGroup>
-    <PackageReference Include="System.IO.Pipelines" Version="7.0.0" />
-  </ItemGroup>
 </Project>
diff --git a/src/libraries/System.Net.Requests/tests/System.Net.Requests.Tests.csproj b/src/libraries/System.Net.Requests/tests/System.Net.Requests.Tests.csproj
@@ -53,5 +53,9 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="System.Net.TestData" Version="$(SystemNetTestDataVersion)" />
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 </Project>
diff --git a/src/libraries/System.Net.Security/tests/FunctionalTests/System.Net.Security.Tests.csproj b/src/libraries/System.Net.Security/tests/FunctionalTests/System.Net.Security.Tests.csproj
@@ -165,5 +165,9 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(CommonTestPath)StreamConformanceTests\StreamConformanceTests.csproj" />
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 </Project>
diff --git a/src/libraries/System.Net.ServerSentEvents/tests/System.Net.ServerSentEvents.Tests.csproj b/src/libraries/System.Net.ServerSentEvents/tests/System.Net.ServerSentEvents.Tests.csproj
@@ -10,10 +10,11 @@
 
   <ItemGroup>
     <ProjectReference Include="..\src\System.Net.ServerSentEvents.csproj"/>
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\gen\System.Text.Json.SourceGeneration.Roslyn4.4.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" SetTargetFramework="TargetFramework=netstandard2.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
-    <PackageReference Include="System.Text.Json" Version="$(SystemTextJsonVersion)" />
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\src\System.Text.Json.csproj" />
   </ItemGroup>
 
 </Project>
diff --git a/src/libraries/System.ObjectModel/tests/System.ObjectModel.Tests.csproj b/src/libraries/System.ObjectModel/tests/System.ObjectModel.Tests.csproj
@@ -42,5 +42,10 @@
     <Compile Include="ReadOnlyObservableCollection\ReadOnlyObservableCollection_SerializationTests.cs" />
     <Compile Include="$(CommonTestPath)System\Runtime\Serialization\Formatters\BinaryFormatterHelpers.cs"
              Link="Common\System\Runtime\Serialization\Formatters\BinaryFormatterHelpers.cs" />
+
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 </Project>
diff --git a/src/libraries/System.Reflection.Metadata/tests/System.Reflection.Metadata.Tests.csproj b/src/libraries/System.Reflection.Metadata/tests/System.Reflection.Metadata.Tests.csproj
@@ -152,6 +152,12 @@
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">
     <PackageReference Include="System.ValueTuple" Version="$(SystemValueTupleVersion)" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' != '.NETFramework'">
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
+  </ItemGroup>
 
   <ItemGroup Condition="'$(TargetOS)' == 'browser'">
     <WasmFilesToIncludeFromPublishDir Include="$(AssemblyName).dll" />

diff --git a/...s/System.Resources.Extensions/tests/BinaryFormatTests/FormattedObject/BasicObjectTests.cs b/...s/System.Resources.Extensions/tests/BinaryFormatTests/FormattedObject/BasicObjectTests.cs
@@ -14,6 +14,14 @@ public class BasicObjectTests : Common.BasicObjectTests<FormattedObjectSerialize
     [MemberData(nameof(SerializableObjects))]
     public void BasicObjectsRoundTripAndMatch(object value, TypeSerializableValue[] _)
     {
+        if (value is WeakReference || (value.GetType().IsGenericType && value.GetType().GetGenericTypeDefinition() == typeof(WeakReference<>)))
+        {
+            // We can root the provided value, but we can't root the deserialized value:
+            // GC can free the target of WeakReference after it gets deserialized,
+            // but before it gets returned from BinaryFormatter.Deserialize.
+            return;
+        }
+
         // We need to round trip through the BinaryFormatter as a few objects in tests remove
         // serialized data on deserialization.
         BinaryFormatter formatter = new();

diff --git a/....Extensions/tests/BinaryFormatTests/System.Resources.Extensions.BinaryFormat.Tests.csproj b/....Extensions/tests/BinaryFormatTests/System.Resources.Extensions.BinaryFormat.Tests.csproj
@@ -32,12 +32,15 @@
     </EmbeddedResource>
     <EmbeddedResource Include="TestResources.resx" LogicalName="TestResources.resources" />
   </ItemGroup>
-  
+
   <ItemGroup>
     <PackageReference Include="System.Drawing.Common.TestData" Version="$(SystemDrawingCommonTestDataVersion)" />
     <ProjectReference Include="..\..\src\System.Resources.Extensions.csproj" />
     <PackageReference Include="System.Drawing.Common" Version="$(SystemDrawingCommonVersion)" />
-    <PackageReference Include="System.Runtime.Serialization.Formatters" Version="$(SystemRuntimeSerializationFormattersVersion)" />
+    <!-- Reference the `NetCoreAppMinimum` build which has a functional BinaryFormatter and force a private copy to ensure it's not excluded -->
+    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.Serialization.Formatters\src\System.Runtime.Serialization.Formatters.csproj"
+                      Private="true"
+                      SetTargetFramework="TargetFramework=$(NetCoreAppMinimum)" />
   </ItemGroup>
 
   <ItemGroup>