diff --git a/README.md b/README.md
index acc8ca351..79543923d 100644
--- a/README.md
+++ b/README.md
@@ -62,12 +62,12 @@ startvs.cmd
 
 To build from the command line:
 ```
-dotnet build Grpc.DotNet.sln
+dotnet build Grpc.DotNet.slnx
 ```
 
 To run tests from the command line:
 ```
-dotnet test Grpc.DotNet.sln
+dotnet test Grpc.DotNet.slnx
 ```
 
 ### Alternative implementation using Code-First (external library)
diff --git a/startvs.cmd b/startvs.cmd
index 325629183..4358afb20 100644
--- a/startvs.cmd
+++ b/startvs.cmd
@@ -14,7 +14,7 @@ SET PATH=%DOTNET_ROOT%;%PATH%
 SET sln=%1
 
 IF "%sln%"=="" (
-    SET sln=Grpc.DotNet.sln
+    SET sln=Grpc.DotNet.slnx
 )
 
 IF NOT EXIST "%DOTNET_ROOT%\dotnet.exe" (