fix VSI test break

build/scripts/cibuild.ps1

@@ -142,11 +142,10 @@ try {
     $target = if ($skipTest) { "Build" } else { "BuildAndTest" }
     $test64Arg = if ($test64) { "true" } else { "false" }
     $testVsiArg = if ($testVsi) { "true" } else { "false" }
-    $testVsiArg = if ($testVsiNetCore) { "true" } else { "false" }
     $buildLog = Join-Path $binariesdir "Build.log"
 
     if ($testVsiNetCore) { 
-        Run-MSBuild /p:BootstrapBuildPath="$bootstrapDir" BuildAndTest.proj /t:$target /p:Configuration=$buildConfiguration /p:Test64=$test64Arg /p:TestVsi=$testVsiArg /p:Trait="Feature=NetCore" /p:PathMap="$($repoDir)=q:\roslyn" /p:Feature=pdb-path-determinism /fileloggerparameters:LogFile="$buildLog"`;verbosity=diagnostic /p:DeployExtension=false
+        Run-MSBuild /p:BootstrapBuildPath="$bootstrapDir" BuildAndTest.proj /t:$target /p:Configuration=$buildConfiguration /p:Test64=$test64Arg /p:TestVsi=true /p:Trait="Feature=NetCore" /p:PathMap="$($repoDir)=q:\roslyn" /p:Feature=pdb-path-determinism /fileloggerparameters:LogFile="$buildLog"`;verbosity=diagnostic /p:DeployExtension=false
     }
     else {
         Run-MSBuild /p:BootstrapBuildPath="$bootstrapDir" BuildAndTest.proj /t:$target /p:Configuration=$buildConfiguration /p:Test64=$test64Arg /p:TestVsi=$testVsiArg /p:PathMap="$($repoDir)=q:\roslyn" /p:Feature=pdb-path-determinism /fileloggerparameters:LogFile="$buildLog"`;verbosity=diagnostic /p:DeployExtension=false