diff --git a/test.ps1 b/test.ps1
index eace16323..307d00469 100644
--- a/test.ps1
+++ b/test.ps1
@@ -11,7 +11,9 @@ param(
 
 if ($codecov -eq 'true') {
 
-  # xunit doesn't understand the CollectCoverage params
+  # xunit doesn't understand the CollectCoverage params so use dotnet test
+  # Coverage tests are run in debug because the coverage tools are triggering a JIT error in filter processors
+  # that causes the blue component of transformed values to be corrupted.
   dotnet clean -c Debug
   dotnet test -c Debug -f $targetFramework /p:codecov=true /p:CollectCoverage=true /p:CoverletOutputFormat=opencover /p:CoverletOutput='../../../coverage.xml'
 }
@@ -25,8 +27,14 @@ else {
     $fxVersion = "--fx-version ${matches[1]}.0"
   }
 
+  # xunit requires explicit path
   Set-Location $env:XUNIT_PATH
 
+  # xunit doesn't actually understand -x64 as an option
+  if ($platform -ne '-x86') {
+    $platform = ''
+  }
+
   dotnet clean -c Release
   dotnet xunit -c Release -f $targetFramework ${fxVersion} $platform