diff --git a/NuGet.config b/NuGet.config
index 12ce55053a..c57d79ca0c 100644
--- a/NuGet.config
+++ b/NuGet.config
@@ -13,8 +13,11 @@
     <add key="xunit.myget" value="https://www.myget.org/F/xunit/api/v3/index.json" />
     <add key="mstest.myget" value="https://dotnet.myget.org/F/mstestv2/api/v3/index.json" />
     <add key="pdb2pdb.myget" value="https://dotnet.myget.org/F/symreader-converter/api/v3/index.json" />
-    <add key="vsunittesting.myget" value="https://dotnet.myget.org/F/vsunittesting/api/v3/index.json" />
+    <add key="vsunittesting.myget" value="https://dotnet.myget.org/F/vsunittesting/api/v3/index.json"/>
+    <add key="dotnet3.1" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1/nuget/v3/index.json" />
+    <add key="dotnet3.1-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1-transport/nuget/v3/index.json" />
     <add key="dotnet5" value="https://dnceng.pkgs.visualstudio.com/public/_packaging/dotnet5/nuget/v3/index.json" />
+    <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
   </packageSources>
   <fallbackPackageFolders>
     <clear />