diff --git a/tools/appveyor.psm1 b/tools/appveyor.psm1
index 46fc0736a..e4c2e0f4b 100644
--- a/tools/appveyor.psm1
+++ b/tools/appveyor.psm1
@@ -33,14 +33,7 @@ function Invoke-AppVeyorInstall {
     # the legacy WMF4 image only has the old preview SDKs of dotnet
     $globalDotJson = Get-Content (Join-Path $PSScriptRoot '..\global.json') -Raw | ConvertFrom-Json
     $requiredDotNetCoreSDKVersion = $globalDotJson.sdk.version
-    if ($PSVersionTable.PSVersion.Major -gt 4) {
-        $requiredDotNetCoreSDKVersionPresent = (dotnet --list-sdks) -match $requiredDotNetCoreSDKVersion
-    }
-    else {
-        # WMF 4 image has old SDK that does not have --list-sdks parameter
-        $requiredDotNetCoreSDKVersionPresent = (dotnet --version).StartsWith($requiredDotNetCoreSDKVersion)
-    }
-    if (-not $requiredDotNetCoreSDKVersionPresent) {
+    if (-not ((dotnet --version).StartsWith($requiredDotNetCoreSDKVersion))) {
         Write-Verbose -Verbose "Installing required .Net CORE SDK $requiredDotNetCoreSDKVersion"
         $originalSecurityProtocol = [Net.ServicePointManager]::SecurityProtocol
         try {