diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationCore/PresentationCore.csproj b/src/Microsoft.DotNet.Wpf/src/PresentationCore/PresentationCore.csproj
index fbe06aa0207..12637b94e62 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationCore/PresentationCore.csproj
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationCore/PresentationCore.csproj
@@ -4,7 +4,8 @@
     <DefineConstants>$(DefineConstants);CORE_NATIVEMETHODS;PRESENTATION_CORE;COMMONDPS</DefineConstants>
     <NoWarn>$(NoWarn);0618;0436;1058;1705;3001;3002;3003;3009;3024</NoWarn>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-    <NoWarn>$(NoWarn)</NoWarn>
+    <!-- SYSLIB5005: System.Formats.Nrbf is experimental -->
+    <NoWarn>$(NoWarn);SYSLIB5005</NoWarn>
     <EnablePInvokeAnalyzer>false</EnablePInvokeAnalyzer>
     <GenerateResourcesSRNamespace>MS.Internal.PresentationCore</GenerateResourcesSRNamespace>
     <ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/PresentationFramework.csproj b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/PresentationFramework.csproj
index 6e84493822b..9572a2184d0 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/PresentationFramework.csproj
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/PresentationFramework.csproj
@@ -5,7 +5,8 @@
     <DefineConstants Condition="'$(WeakEventTelemetry)'=='true'">$(DefineConstants);WeakEventTelemetry</DefineConstants>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <EnablePInvokeAnalyzer>false</EnablePInvokeAnalyzer>
-    <NoWarn>$(NoWarn);0618;1058</NoWarn>
+    <!-- SYSLIB5005: System.Formats.Nrbf is experimental -->
+    <NoWarn>$(NoWarn);0618;1058;SYSLIB5005</NoWarn>
     <ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
     <Platforms>AnyCPU;x64;arm64</Platforms>
     <GenerateDependencyFile>false</GenerateDependencyFile>
diff --git a/src/Microsoft.DotNet.Wpf/tests/UnitTests/PresentationCore.Tests/PresentationCore.Tests.csproj b/src/Microsoft.DotNet.Wpf/tests/UnitTests/PresentationCore.Tests/PresentationCore.Tests.csproj
index f4004eb3454..55fc1f2ebd8 100644
--- a/src/Microsoft.DotNet.Wpf/tests/UnitTests/PresentationCore.Tests/PresentationCore.Tests.csproj
+++ b/src/Microsoft.DotNet.Wpf/tests/UnitTests/PresentationCore.Tests/PresentationCore.Tests.csproj
@@ -7,6 +7,8 @@
     <Nullable>enable</Nullable>
     <Platforms>AnyCPU;x64;x86;ARM64</Platforms>
     <EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
+    <!-- SYSLIB5005: System.Formats.Nrbf is experimental -->
+    <NoWarn>$(NoWarn);SYSLIB5005</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>