diff --git a/eng/testing/AppleRunnerTemplate.sh b/eng/testing/AppleRunnerTemplate.sh
index 0f2eb7f2abed87..47352018d1ac42 100644
--- a/eng/testing/AppleRunnerTemplate.sh
+++ b/eng/testing/AppleRunnerTemplate.sh
@@ -16,17 +16,17 @@ if [ -n "$5" ]; then
     ADDITIONAL_ARGS=${@:5}
 fi
 
-if [[ "$TARGET_OS" == "MacCatalyst" ]]; then TARGET=maccatalyst; fi
+if [[ "$TARGET_OS" == "maccatalyst" ]]; then TARGET=maccatalyst; fi
 
-if [[ "$TARGET_OS" == "iOSSimulator" && "$TARGET_ARCH" == "x86" ]]; then TARGET=ios-simulator-32; fi
-if [[ "$TARGET_OS" == "iOSSimulator" && "$TARGET_ARCH" == "x64" ]]; then TARGET=ios-simulator-64; fi
-if [[ "$TARGET_OS" == "iOSSimulator" && "$TARGET_ARCH" == "arm64" ]]; then TARGET=ios-simulator-64; fi
-if [[ "$TARGET_OS" == "iOS" && "$TARGET_ARCH" == "arm" ]]; then TARGET=ios-device; fi
-if [[ "$TARGET_OS" == "iOS" && "$TARGET_ARCH" == "arm64" ]]; then TARGET=ios-device; fi
+if [[ "$TARGET_OS" == "iossimulator" && "$TARGET_ARCH" == "x86" ]]; then TARGET=ios-simulator-32; fi
+if [[ "$TARGET_OS" == "iossimulator" && "$TARGET_ARCH" == "x64" ]]; then TARGET=ios-simulator-64; fi
+if [[ "$TARGET_OS" == "iossimulator" && "$TARGET_ARCH" == "arm64" ]]; then TARGET=ios-simulator-64; fi
+if [[ "$TARGET_OS" == "ios" && "$TARGET_ARCH" == "arm" ]]; then TARGET=ios-device; fi
+if [[ "$TARGET_OS" == "ios" && "$TARGET_ARCH" == "arm64" ]]; then TARGET=ios-device; fi
 
-if [[ "$TARGET_OS" == "tvOSSimulator" && "$TARGET_ARCH" == "x64" ]]; then TARGET=tvos-simulator; fi
-if [[ "$TARGET_OS" == "tvOSSimulator" && "$TARGET_ARCH" == "arm64" ]]; then TARGET=tvos-simulator; fi
-if [[ "$TARGET_OS" == "tvOS" && "$TARGET_ARCH" == "arm64" ]]; then TARGET=tvos-device; fi
+if [[ "$TARGET_OS" == "tvossimulator" && "$TARGET_ARCH" == "x64" ]]; then TARGET=tvos-simulator; fi
+if [[ "$TARGET_OS" == "tvossimulator" && "$TARGET_ARCH" == "arm64" ]]; then TARGET=tvos-simulator; fi
+if [[ "$TARGET_OS" == "tvos" && "$TARGET_ARCH" == "arm64" ]]; then TARGET=tvos-device; fi
 
 # "Release" in SCHEME_SDK is what xcode produces (see "bool Optimized" property in AppleAppBuilderTask)
 if [[ "$TARGET" == "ios-simulator-"* ]]; then SCHEME_SDK=Release-iphonesimulator; fi
diff --git a/eng/testing/tests.targets b/eng/testing/tests.targets
index 9fc08ddd6bcc70..53256725fb9594 100644
--- a/eng/testing/tests.targets
+++ b/eng/testing/tests.targets
@@ -96,7 +96,7 @@
       <RunTestsCommand Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp' and
                                   $([MSBuild]::VersionGreaterThanOrEquals($(TargetFrameworkVersion), '$(NETCoreAppCurrentVersion)'))">$(RunTestsCommand) --runtime-path "$(TestHostRootPath.TrimEnd('\/'))"</RunTestsCommand>
       <RunTestsCommand Condition="'$(TestRspFile)' != '' and '$(RuntimeFlavor)' != 'Mono'">$(RunTestsCommand) --rsp-file "$(TestRspFile)"</RunTestsCommand>
-      <RunTestsCommand Condition="'$(TargetsMobile)' == 'true'">"$(RunScriptOutputPath)" $(AssemblyName) $(TargetArchitecture) $(TargetOS) $(TestProjectName) $(AdditionalXHarnessArguments)</RunTestsCommand>
+      <RunTestsCommand Condition="'$(TargetsMobile)' == 'true'">"$(RunScriptOutputPath)" $(AssemblyName) $(TargetArchitecture) $(TargetOS.ToLowerInvariant()) $(TestProjectName) $(AdditionalXHarnessArguments)</RunTestsCommand>
       <RunTestsCommand Condition="'$(TargetOS)' == 'Browser'">"$(RunScriptOutputPath)" $(JSEngine) $(AssemblyName).dll $(Scenario)</RunTestsCommand>
     </PropertyGroup>