diff --git a/dependencies.props b/dependencies.props
index 5a580be8d949..c50ca54be0cd 100644
--- a/dependencies.props
+++ b/dependencies.props
@@ -1,5 +1,14 @@
 <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
+  <!-- NuGet package restore sources. -->
+  <PropertyGroup>
+    <RestoreSources Condition="'$(DotNetBuildOffline)' != 'true'">
+      https://dotnet.myget.org/F/dotnet-core/api/v3/index.json;
+      https://api.nuget.org/v3/index.json;
+      $(RestoreSources)
+    </RestoreSources>
+  </PropertyGroup>
+
   <PropertyGroup>
     <!-- Central place to set the versions of all nuget packages produced in the repo -->
     <PackageVersion Condition="'$(PackageVersion)' == ''">2.1.0</PackageVersion>
@@ -19,20 +28,16 @@
     <PgoDataCurrentRef>5b662e16887cd01cada59eb678ab0c1dd64438c4</PgoDataCurrentRef>
   </PropertyGroup>
 
-  <!-- Auto-upgraded properties for each build info dependency. -->
-  <PropertyGroup>
-    <CoreFxPackageVersion>4.5.0-preview1-25830-02</CoreFxPackageVersion>
-    <PlatformPackageVersion>2.1.0-preview1-25830-02</PlatformPackageVersion>
-    <PgoDataPackageVersion>99.99.99-master-20171030-0047</PgoDataPackageVersion>
-  </PropertyGroup>
-
-  <!-- Full package version strings that are used in other parts of the build. -->
+  <!-- Tests/infrastructure dependency versions. -->
   <PropertyGroup>
-    <CoreClrPackageVersion>2.1.0-preview1-25829-02</CoreClrPackageVersion>
+    <CoreFxPackageVersion>4.5.0-preview1-25824-02</CoreFxPackageVersion>
+    <PlatformPackageVersion>2.1.0-preview1-25824-02</PlatformPackageVersion>
+    <PgoDataPackageVersion>99.99.99-master-20171025-1102</PgoDataPackageVersion>
+    <CoreClrPackageVersion>2.1.0-preview1-25824-51</CoreClrPackageVersion>
     <XunitPackageVersion>2.2.0-beta2-build3300</XunitPackageVersion>
-    <XUnitConsoleNetCoreVersion>1.0.2-prerelease-00177</XUnitConsoleNetCoreVersion>
-    <XUnitPerformanceApiVersion>1.0.0-beta-build0007</XUnitPerformanceApiVersion>
-    <MicrosoftDiagnosticsTracingLibraryVersion>1.0.3-alpha-experimental</MicrosoftDiagnosticsTracingLibraryVersion>
+    <XunitConsoleNetcorePackageVersion>1.0.2-prerelease-00177</XunitConsoleNetcorePackageVersion>
+    <XunitPerformanceApiPackageVersion>1.0.0-beta-build0007</XunitPerformanceApiPackageVersion>
+    <MicrosoftDiagnosticsTracingTraceEventPackageVersion>1.0.3-alpha-experimental</MicrosoftDiagnosticsTracingTraceEventPackageVersion>
     <VCRuntimeVersion>1.2.0</VCRuntimeVersion>
   </PropertyGroup>
 
@@ -73,17 +78,17 @@
 
     <XmlUpdateStep Include="CoreFx">
       <Path>$(MSBuildThisFileFullPath)</Path>
-      <ElementName>CoreFxPackageVersion</ElementName>
+      <ElementName>MicrosoftPrivateCoreFxNETCoreAppPackageVersion</ElementName>
       <PackageId>Microsoft.Private.CoreFx.NETCoreApp</PackageId>
     </XmlUpdateStep>
     <XmlUpdateStep Include="CoreFx">
       <Path>$(MSBuildThisFileFullPath)</Path>
-      <ElementName>PlatformPackageVersion</ElementName>
+      <ElementName>MicrosoftNETCorePlatformsPackageVersion</ElementName>
       <PackageId>Microsoft.NETCore.Platforms</PackageId>
     </XmlUpdateStep>
     <XmlUpdateStep Include="CoreClr">
       <Path>$(MSBuildThisFileFullPath)</Path>
-      <ElementName>CoreClrPackageVersion</ElementName>
+      <ElementName>MicrosoftNETCoreRuntimeCoreCLRPackageVersion</ElementName>
       <PackageId>Microsoft.NETCore.Runtime.CoreCLR</PackageId>
     </XmlUpdateStep>
     <UpdateStep Include="BuildTools">
@@ -131,11 +136,11 @@
     <XUnitPerformanceApiDependency Include="xunit.performance.execution" />
     <XUnitPerformanceApiDependency Include="xunit.performance.metrics" />
     <StaticDependency Include="@(XUnitPerformanceApiDependency)">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </StaticDependency>
 
     <StaticDependency Include="xunit.console.netcore">
-      <Version>$(XUnitConsoleNetCoreVersion)</Version>
+      <Version>$(XunitConsoleNetcorePackageVersion)</Version>
     </StaticDependency>
 
     <DependencyBuildInfo Include="@(StaticDependency)">
@@ -143,4 +148,17 @@
       <UpdateStableVersions>true</UpdateStableVersions>
     </DependencyBuildInfo>
   </ItemGroup>
+
+  <!-- Override isolated build dependency versions with versions from Repo API. -->
+  <Import Project="$(DotNetPackageVersionPropsPath)"
+          Condition="'$(DotNetPackageVersionPropsPath)' != ''" />
+
+  <!--
+    Map PackageVersion properties that don't match the Repo API naming conventions. This must be
+    defined after the DotNetPackageVersionPropsPath Import so overrides apply correctly.
+  -->
+  <PropertyGroup>
+    <!-- A single property used to get all CoreCLR packages in various places. -->
+    <CoreClrPackageVersion>$(MicrosoftNETCoreRuntimeCoreCLRPackageVersion)</CoreClrPackageVersion>    
+  </PropertyGroup>
 </Project>
diff --git a/dir.props b/dir.props
index cf1eb96b5a87..8ba1c0ff94e5 100644
--- a/dir.props
+++ b/dir.props
@@ -166,8 +166,8 @@
     <CrossTargetComponentFolder Condition="'$(PackagePlatform)' == 'arm64'">x64</CrossTargetComponentFolder>
     <CrossTargetComponentFolder Condition="'$(PackagePlatform)' == 'arm'">x86</CrossTargetComponentFolder>
 
-    <PackageOutputPath>$(PackagesBinDir)/pkg/</PackageOutputPath>
-    <SymbolPackageOutputPath>$(PackagesBinDir)/symbolpkg/</SymbolPackageOutputPath>
+    <PackageOutputPath Condition="'$(PackageOutputPath)' == ''">$(PackagesBinDir)/pkg/</PackageOutputPath>
+    <SymbolPackageOutputPath Condition="'$(SymbolPackageOutputPath)' == ''">$(PackagesBinDir)/symbolpkg/</SymbolPackageOutputPath>
     <PackageIndexFile>$(MSBuildThisFileDirectory)/src/.nuget/packageIndex.json</PackageIndexFile>
 
     <!-- coreclr doesn't currently use the index so don't force it to be in sync -->
diff --git a/tests/dir.props b/tests/dir.props
index c234891bfdc6..e288f3b5bc18 100644
--- a/tests/dir.props
+++ b/tests/dir.props
@@ -83,20 +83,22 @@
   <!-- Provides properties for dependency versions and configures dependency verification/auto-upgrade. -->
   <Import Project="$(ProjectDir)..\dependencies.props" />
 
+  <!-- Add test-specific package restore sources. -->
+  <PropertyGroup>
+    <RestoreSources Condition="'$(DotNetBuildOffline)' != 'true'">
+      https://dotnet.myget.org/F/dotnet-corefxlab/api/v3/index.json;
+      $(RestoreSources)
+    </RestoreSources>
+    <RestoreSources Condition="'$(OverwriteCoreClrPackageVersion)' == 'true'">
+      $(PackagesDir)AzureTransfer\;
+      $(RestoreSources)
+    </RestoreSources>
+  </PropertyGroup>
+
   <!-- Use Roslyn Compilers to build -->
-  <Import Project="$(RoslynPropsFile)" Condition="'$(RunningOnUnix)'!='true' and Exists('$(RoslynPropsFile)') and '$(UseRoslynCompilers)'!='false' and '$(RoslynIncompatibleMsbuildVersion)' != 'true'" />
-  <Import Project="$(RoslynPropsFile)" Condition="'$(RunningOnUnix)'=='true' and Exists('$(RoslynPropsFile)') and '$(RoslynIncompatibleMsbuildVersion)' != 'true'" />
-
-   <ItemGroup> 
-     <!-- Need to escape double forward slash (%2F) or MSBuild will normalize to one slash on Unix. -->
-     <DotnetSourceList Include="$(IntermediateAzureFeed)" Condition="'$(OverwriteCoreClrPackageVersion)' == 'true'" />
-     <DotnetSourceList Include="https:%2F%2Fdotnetfeed.blob.core.windows.net/dotnet-core/packages/index.json" />
-     <DotnetSourceList Include="https:%2F%2Fdotnet.myget.org/F/dotnet-corefxlab/api/v3/index.json" />
-     <DotnetSourceList Include="https:%2F%2Fdotnet.myget.org/F/dotnet-core/api/v3/index.json" />
-     <DotnetSourceList Include="https:%2F%2Fdotnet.myget.org/F/dotnet-buildtools/api/v3/index.json" /> 
-     <DotnetSourceList Include="https:%2F%2Fapi.nuget.org/v3/index.json" />
-   </ItemGroup> 
-  
+  <Import Project="$(RoslynPropsFile)" Condition="'$(RunningOnUnix)'!='true' and Exists('$(RoslynPropsFile)') and '$(UseRoslynCompilers)'!='false'" />
+  <Import Project="$(RoslynPropsFile)" Condition="'$(RunningOnUnix)'=='true' and Exists('$(RoslynPropsFile)')" />
+
   <PropertyGroup Condition="'$(BuildAllProjects)'=='true'">
     <!-- When we do a traversal build we get all packages up front, don't restore them again -->
     <RestorePackages>false</RestorePackages>
diff --git a/tests/src/Common/external/external.depproj b/tests/src/Common/external/external.depproj
index 7a9725176a09..46d753cdf019 100644
--- a/tests/src/Common/external/external.depproj
+++ b/tests/src/Common/external/external.depproj
@@ -25,19 +25,19 @@
       <Version>2.1.1-beta</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.api">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.core">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.execution">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.metrics">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent">
-      <Version>$(MicrosoftDiagnosticsTracingLibraryVersion)</Version>
+      <Version>$(MicrosoftDiagnosticsTracingTraceEventPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Newtonsoft.Json">
       <Version>9.0.1</Version>
@@ -46,7 +46,7 @@
       <Version>$(XunitPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.console.netcore">
-      <Version>$(XUnitConsoleNetCoreVersion)</Version>
+      <Version>$(XunitConsoleNetcorePackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.runner.utility">
       <Version>$(XunitPackageVersion)</Version>
diff --git a/tests/src/Common/test_dependencies/test_dependencies.csproj b/tests/src/Common/test_dependencies/test_dependencies.csproj
index 9eefab2f10ca..c3b418dcece1 100644
--- a/tests/src/Common/test_dependencies/test_dependencies.csproj
+++ b/tests/src/Common/test_dependencies/test_dependencies.csproj
@@ -11,17 +11,16 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Private.CoreFx.NETCoreApp">
-      <Version>$(CoreFxPackageVersion)</Version>
+      <Version>$(MicrosoftPrivateCoreFxNETCoreAppPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="System.Memory">
-      <Version>$(CoreFxPackageVersion)</Version>
+      <Version>$(MicrosoftPrivateCoreFxNETCoreAppPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="System.Runtime.CompilerServices.Unsafe">
-      <Version>$(CoreFxPackageVersion)</Version>
+      <Version>$(MicrosoftPrivateCoreFxNETCoreAppPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="System.Security.Permissions">
-      <Version>$(CoreFxPackageVersion)</Version>
-    </PackageReference>
+      <Version>$(MicrosoftPrivateCoreFxNETCoreAppPackageVersion)</Version>
   </ItemGroup>
   <PropertyGroup>
     <TargetFramework>netcoreapp2.1</TargetFramework>
diff --git a/tests/src/Common/test_runtime/test_runtime.csproj b/tests/src/Common/test_runtime/test_runtime.csproj
index a8ae626901ec..7bb27db14463 100644
--- a/tests/src/Common/test_runtime/test_runtime.csproj
+++ b/tests/src/Common/test_runtime/test_runtime.csproj
@@ -11,7 +11,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NETCore.Platforms">
-      <Version>$(PlatformPackageVersion)</Version>
+      <Version>$(MicrosoftNETCorePlatformsPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.DotNet.CoreCLR.TestDependencies">
       <Version>1.0.0-prerelease</Version>
diff --git a/tests/src/JIT/config/benchmark+roslyn/benchmark+roslyn.csproj b/tests/src/JIT/config/benchmark+roslyn/benchmark+roslyn.csproj
index 9155703cd365..c46e42ad1d1e 100644
--- a/tests/src/JIT/config/benchmark+roslyn/benchmark+roslyn.csproj
+++ b/tests/src/JIT/config/benchmark+roslyn/benchmark+roslyn.csproj
@@ -11,19 +11,19 @@
       <Version>1.1.1</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.api">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.core">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.execution">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.metrics">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent">
-      <Version>$(MicrosoftDiagnosticsTracingLibraryVersion)</Version>
+      <Version>$(MicrosoftDiagnosticsTracingTraceEventPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.NETCore.Platforms">
       <Version>2.0.0-preview2-25302-03</Version>
@@ -80,7 +80,7 @@
       <Version>$(XunitPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.console.netcore">
-      <Version>$(XUnitConsoleNetCoreVersion)</Version>
+      <Version>$(XunitConsoleNetcorePackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.runner.utility">
       <Version>$(XunitPackageVersion)</Version>
diff --git a/tests/src/JIT/config/benchmark+serialize/benchmark+serialize.csproj b/tests/src/JIT/config/benchmark+serialize/benchmark+serialize.csproj
index 36181432d274..1b85f9b91ab7 100644
--- a/tests/src/JIT/config/benchmark+serialize/benchmark+serialize.csproj
+++ b/tests/src/JIT/config/benchmark+serialize/benchmark+serialize.csproj
@@ -8,19 +8,19 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="xunit.performance.api">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.core">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.execution">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.metrics">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent">
-      <Version>$(MicrosoftDiagnosticsTracingLibraryVersion)</Version>
+      <Version>$(MicrosoftDiagnosticsTracingTraceEventPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.NETCore.Platforms">
       <Version>2.0.0-preview2-25302-03</Version>
@@ -80,7 +80,7 @@
       <Version>$(XunitPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.console.netcore">
-      <Version>$(XUnitConsoleNetCoreVersion)</Version>
+      <Version>$(XunitConsoleNetcorePackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.runner.utility">
       <Version>$(XunitPackageVersion)</Version>
diff --git a/tests/src/JIT/config/benchmark/benchmark.csproj b/tests/src/JIT/config/benchmark/benchmark.csproj
index d6d4a51fc452..1c4f90faca61 100644
--- a/tests/src/JIT/config/benchmark/benchmark.csproj
+++ b/tests/src/JIT/config/benchmark/benchmark.csproj
@@ -8,19 +8,19 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="xunit.performance.api">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.core">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.execution">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.metrics">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent">
-      <Version>$(MicrosoftDiagnosticsTracingLibraryVersion)</Version>
+      <Version>$(MicrosoftDiagnosticsTracingTraceEventPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.NETCore.Platforms">
       <Version>2.0.0-preview2-25302-03</Version>
@@ -95,7 +95,7 @@
       <Version>$(XunitPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.console.netcore">
-      <Version>$(XUnitConsoleNetCoreVersion)</Version>
+      <Version>$(XunitConsoleNetcorePackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.runner.utility">
       <Version>$(XunitPackageVersion)</Version>
diff --git a/tests/src/TestWrappersConfig/TestWrappersConfig.csproj b/tests/src/TestWrappersConfig/TestWrappersConfig.csproj
index ddc8781364b5..76128421d2c9 100644
--- a/tests/src/TestWrappersConfig/TestWrappersConfig.csproj
+++ b/tests/src/TestWrappersConfig/TestWrappersConfig.csproj
@@ -9,7 +9,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NETCore.Platforms">
-      <Version>$(PlatformPackageVersion)</Version>
+      <Version>$(MicrosoftNETCorePlatformsPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit">
       <Version>$(XunitPackageVersion)</Version>
diff --git a/tests/src/performance/performance.csproj b/tests/src/performance/performance.csproj
index 8133535f4514..4a68139f4328 100644
--- a/tests/src/performance/performance.csproj
+++ b/tests/src/performance/performance.csproj
@@ -8,19 +8,19 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="xunit.performance.api">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.core">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.execution">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.performance.metrics">
-      <Version>$(XUnitPerformanceApiVersion)</Version>
+      <Version>$(XunitPerformanceApiPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent">
-      <Version>$(MicrosoftDiagnosticsTracingLibraryVersion)</Version>
+      <Version>$(MicrosoftDiagnosticsTracingTraceEventPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.NETCore.Platforms">
       <Version>2.0.0-preview2-25302-03</Version>
@@ -92,7 +92,7 @@
       <Version>$(XunitPackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.console.netcore">
-      <Version>$(XUnitConsoleNetCoreVersion)</Version>
+      <Version>$(XunitConsoleNetcorePackageVersion)</Version>
     </PackageReference>
     <PackageReference Include="xunit.runner.utility">
       <Version>$(XunitPackageVersion)</Version>