diff --git a/build/Targets/Packages.props b/build/Targets/Packages.props
index f9c2e02521dffdecb92446aabccdd609a36d19cc..46a0cd61041d7d95869a331f2b48704e22d123b9 100644
--- a/build/Targets/Packages.props
+++ b/build/Targets/Packages.props
@@ -48,7 +48,8 @@
     <MicrosoftInternalVisualStudioShellInterop140DesignTimeVersion>14.3.25407-alpha</MicrosoftInternalVisualStudioShellInterop140DesignTimeVersion>
     <MicrosoftMetadataVisualizerVersion>1.0.0-beta1-61531-03</MicrosoftMetadataVisualizerVersion>
     <MicrosoftMSXMLVersion>8.0.0.0-alpha</MicrosoftMSXMLVersion>
-    <MicrosoftNETTestSdkVersion>15.3.0</MicrosoftNETTestSdkVersion>
+    <!-- Using a private build of Microsoft.Net.Test.SDK to work around issue https://github.com/Microsoft/vstest/issues/373 -->
+    <MicrosoftNETTestSdkVersion>15.6.0-dev</MicrosoftNETTestSdkVersion>
     <MicrosoftNetCompilersVersion>2.6.0-beta3-62227-02</MicrosoftNetCompilersVersion>
     <MicrosoftNetRoslynDiagnosticsVersion>2.6.0-beta1-62231-02</MicrosoftNetRoslynDiagnosticsVersion>
     <MicrosoftNetCoreILAsmVersion>2.0.0</MicrosoftNetCoreILAsmVersion>