diff --git a/src/tests/Common/CLRTest.CrossGen.targets b/src/tests/Common/CLRTest.CrossGen.targets
index 606c4a6cd7543..30102cca1544b 100644
--- a/src/tests/Common/CLRTest.CrossGen.targets
+++ b/src/tests/Common/CLRTest.CrossGen.targets
@@ -65,7 +65,7 @@ if [ ! -z ${RunCrossGen2+x} ]%3B then
         cp $CORE_ROOT/lib*.so $CORE_ROOT/lib*.dylib $(scriptPath)
       else
         cp *.dll IL-CG2/
-        rm IL-CG2/composite-r2r.dll
+        rm IL-CG2/composite-r2r.dll 2>/dev/null
       fi
 
       ExtraCrossGen2Args+=" $(CrossGen2TestExtraArguments)"
@@ -77,10 +77,11 @@ if [ ! -z ${RunCrossGen2+x} ]%3B then
       __cg2ExitCode=0
 
       OneFileCrossgen2() {
+        date +%H:%M:%S
         __OutputFile=$1
 
         __ResponseFile="$__OutputFile.rsp"
-        rm $__ResponseFile
+        rm $__ResponseFile 2>/dev/null
 
         __Command=$_DebuggerFullPath
         # Tests run locally need __TestDotNetCmd (set by runtest.py) or a compatible 5.0 dotnet runtime in the path
@@ -114,6 +115,7 @@ if [ ! -z ${RunCrossGen2+x} ]%3B then
         __cg2ExitCode=$?
 
         export COMPlus_GCName COMPlus_GCStress COMPlus_HeapVerify COMPlus_ReadyToRun COMPlus_TC_OnStackReplacement COMPlus_TC_PartialCompilation
+        date +%H:%M:%S
       }
 
       if [ ! -z ${CompositeBuildMode+x} ]%3B then
@@ -183,7 +185,7 @@ if defined RunCrossGen2 (
 
     mkdir IL-CG2
     copy *.dll IL-CG2\
-    del IL-CG2\composite-r2r.dll
+    del IL-CG2\composite-r2r.dll 2>nul
 
     if defined CompositeBuildMode (
         set ExtraCrossGen2Args=!ExtraCrossGen2Args! --composite
@@ -208,8 +210,9 @@ if defined RunCrossGen2 (
 
     goto :DoneCrossgen2Operations
 :CompileOneFileCrossgen2
+    echo %time%
     set __ResponseFile=!__OutputFile!.rsp
-    del /Q !__ResponseFile!
+    del /Q !__ResponseFile! 2>nul
 
     set __Command=!_DebuggerFullPath!
     REM Tests run locally need __TestDotNetCmd (set by runtest.py) or a compatible 5.0 dotnet runtime in the path
@@ -253,6 +256,7 @@ if defined RunCrossGen2 (
     call !__Command!
     endlocal
     set CrossGen2Status=!ERRORLEVEL!
+    echo %time%
     Exit /b 0
 
 :DoneCrossgen2Operations
diff --git a/src/tests/Common/CoreCLRTestLibrary/OutOfProcessTest.cs b/src/tests/Common/CoreCLRTestLibrary/OutOfProcessTest.cs
index 976f542a6b21e..ad68f35537b92 100644
--- a/src/tests/Common/CoreCLRTestLibrary/OutOfProcessTest.cs
+++ b/src/tests/Common/CoreCLRTestLibrary/OutOfProcessTest.cs
@@ -1,4 +1,4 @@
-// Licensed to the .NET Foundation under one or more agreements.
+// Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
@@ -71,6 +71,12 @@ public static void RunOutOfProcessTest(string basePath, string assemblyPath)
                     testExecutable = Path.Combine(baseDir, Path.ChangeExtension(assemblyPath.Replace("\\", "/"), ".sh"));
                 }
 
+                if (!File.Exists(testExecutable))
+                {
+                    // Skip platform-specific test when running on the excluded platform
+                    return;
+                }
+
                 System.IO.Directory.CreateDirectory(outputDir);
 
                 ret = wrapper.RunTest(testExecutable, outputFile, errorFile, Assembly.GetEntryAssembly()!.FullName!, testBinaryBase, outputDir);
diff --git a/src/tests/Common/XUnitWrapperGenerator/ITestInfo.cs b/src/tests/Common/XUnitWrapperGenerator/ITestInfo.cs
index d0db16db340b5..213fc3d36d1bb 100644
--- a/src/tests/Common/XUnitWrapperGenerator/ITestInfo.cs
+++ b/src/tests/Common/XUnitWrapperGenerator/ITestInfo.cs
@@ -338,15 +338,15 @@ public string WrapTestExecutionWithReporting(string testExecutionExpression, ITe
 
         builder.AppendLine($"System.TimeSpan testStart = stopwatch.Elapsed;");
         builder.AppendLine("try {");
-        builder.AppendLine($"System.Console.WriteLine(\"Running test: {{0}}\", {test.TestNameExpression});");
+        builder.AppendLine($"System.Console.WriteLine(\"{{0:HH:mm:ss.fff}} Running test: {{1}}\", System.DateTime.Now, {test.TestNameExpression});");
         builder.AppendLine($"{_outputRecorderIdentifier}.ResetTestOutput();");
         builder.AppendLine(testExecutionExpression);
         builder.AppendLine($"{_summaryLocalIdentifier}.ReportPassedTest({test.TestNameExpression}, \"{test.ContainingType}\", @\"{test.Method}\", stopwatch.Elapsed - testStart, {_outputRecorderIdentifier}.GetTestOutput());");
-        builder.AppendLine($"System.Console.WriteLine(\"Passed test: {{0}}\", {test.TestNameExpression});");
+        builder.AppendLine($"System.Console.WriteLine(\"{{0:HH:mm:ss.fff}} Passed test: {{1}}\", System.DateTime.Now, {test.TestNameExpression});");
         builder.AppendLine("}");
         builder.AppendLine("catch (System.Exception ex) {");
         builder.AppendLine($"{_summaryLocalIdentifier}.ReportFailedTest({test.TestNameExpression}, \"{test.ContainingType}\", @\"{test.Method}\", stopwatch.Elapsed - testStart, ex, {_outputRecorderIdentifier}.GetTestOutput());");
-        builder.AppendLine($"System.Console.WriteLine(\"Failed test: {{0}}\", {test.TestNameExpression});");
+        builder.AppendLine($"System.Console.WriteLine(\"{{0:HH:mm:ss.fff}} Failed test: {{1}}\", System.DateTime.Now, {test.TestNameExpression});");
         builder.AppendLine("}");
 
         builder.AppendLine("}");
diff --git a/src/tests/Directory.Build.targets b/src/tests/Directory.Build.targets
index 96d65ab0eabf5..582f8c7b7ae59 100644
--- a/src/tests/Directory.Build.targets
+++ b/src/tests/Directory.Build.targets
@@ -217,12 +217,17 @@
   </Target>
 
   <Target Name="CopyAllNativeProjectReferenceBinaries"
-          DependsOnTargets="ResolveCMakeNativeProjectReference;ConsolidateNativeProjectReference">
+          DependsOnTargets="ResolveCMakeNativeProjectReference;ConsolidateNativeProjectReference"
+          BeforeTargets="Build">
 
     <ItemGroup Condition="'$(IsMergedTestRunnerAssembly)' == 'true'">
-      <MergedWrapperReferenceFolders Include="@(ProjectReference->'$([System.IO.Path]::GetFullPath('%(ProjectReference.Identity)/..', '$(OutDir)/..'))/%(ProjectReference.FileName)')" />
+      <OutOfProcessTestMarkers Include="$(OutDir)/../**/*.OutOfProcessTest" />
+      <OutOfProcessTestFolders Include="$([MSBuild]::NormalizePath('$([System.IO.Path]::GetDirectoryName('%(OutOfProcessTestMarkers.FullPath)'))'))" Condition="'@(OutOfProcessTestMarkers)' != ''" />
+      <MergedWrapperReferenceFolders Include="@(ProjectReference->'$([MSBuild]::NormalizePath('$([System.IO.Path]::GetFullPath('%(ProjectReference.Identity)/..', '$(OutDir)/..'))/%(ProjectReference.FileName)'))')" />
+      <!-- Don't copy out-of-process test components to the merged wrapper output folder -->
+      <MergedWrapperReferenceFolders Remove="@(OutOfProcessTestFolders)" />
       <!-- For merged project wrappers, include native libraries in all project references -->
-      <MergedWrapperReferenceFiles Include="%(MergedWrapperReferenceFolders.Identity)/*$(LibSuffix)" />
+      <MergedWrapperReferenceFiles Include="%(MergedWrapperReferenceFolders.Identity)/*$(LibSuffix)" Condition="'@(MergedWrapperReferenceFolders)' != ''" />
     </ItemGroup>
     <Copy SourceFiles="@(MergedWrapperReferenceFiles)"
         DestinationFiles="@(MergedWrapperReferenceFiles->'$(OutDir)/%(FileName)%(Extension)')"
diff --git a/src/tests/JIT/Methodical/Arrays/misc/arrres_il_r.ilproj b/src/tests/JIT/Methodical/Arrays/misc/arrres_il_r.ilproj
index 1020cf984f3b3..28aac69890b7a 100644
--- a/src/tests/JIT/Methodical/Arrays/misc/arrres_il_r.ilproj
+++ b/src/tests/JIT/Methodical/Arrays/misc/arrres_il_r.ilproj
@@ -7,6 +7,7 @@
   <PropertyGroup>
     <DebugType>PdbOnly</DebugType>
     <JitOptimizationSensitive>true</JitOptimizationSensitive>
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="arrres.il" />
diff --git a/src/tests/JIT/Methodical/tailcall_v4/hijacking.ilproj b/src/tests/JIT/Methodical/tailcall_v4/hijacking.ilproj
index 2856022120ab8..da27e6f81deaf 100644
--- a/src/tests/JIT/Methodical/tailcall_v4/hijacking.ilproj
+++ b/src/tests/JIT/Methodical/tailcall_v4/hijacking.ilproj
@@ -13,6 +13,7 @@
   </PropertyGroup>
   <PropertyGroup>
     <JitOptimizationSensitive>true</JitOptimizationSensitive>
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="hijacking.il" />
diff --git a/src/tests/issues.targets b/src/tests/issues.targets
index caaae135a4f87..31c42e2e19fd5 100644
--- a/src/tests/issues.targets
+++ b/src/tests/issues.targets
@@ -1868,6 +1868,12 @@
         <ExcludeList Include="$(XunitTestBinBase)/JIT/Methodical/refany/lcs_il_r/**">
             <Issue>https://github.com/dotnet/runtime/issues/34196</Issue>
         </ExcludeList>
+        <ExcludeList Include = "$(XunitTestBinBase)/JIT/Methodical/tailcall/compat_i4_u_il_d/**">
+            <Issue>https://github.com/dotnet/runtime/issues/67756</Issue>
+        </ExcludeList>
+        <ExcludeList Include = "$(XunitTestBinBase)/JIT/Methodical/tailcall/compat_i4_u_il_r/**">
+            <Issue>https://github.com/dotnet/runtime/issues/67756</Issue>
+        </ExcludeList>
         <ExcludeList Include="$(XunitTestBinBase)JIT/Methodical/tailcall_v4/hijacking/**">
             <Issue>needs triage</Issue>
         </ExcludeList>
@@ -4007,6 +4013,8 @@
             <FilteredExcludeList
                 Include="$([System.IO.Path]::GetRelativePath('$(XunitTestBinBase)', '%(ExcludeList.FullPath)'))"
                 Condition="'%(ExcludeList.Extension)' == '.dll'" />
+            <FilteredExcludeList Include="$([System.IO.Path]::ChangeExtension('$([System.IO.Path]::GetRelativePath('$(XunitTestBinBase)', '%(ExcludeList.RootDir)%(ExcludeList.Directory)%(ExcludeList.FileName)'))', '.cmd'))"
+                Condition="'%(ExcludeList.Extension)' == '.OutOfProcessTest'" />
       </ItemGroup>
     </Target>
 </Project>
diff --git a/src/tests/run.py b/src/tests/run.py
index aab137bafa08f..b6a1565704eb7 100755
--- a/src/tests/run.py
+++ b/src/tests/run.py
@@ -844,8 +844,8 @@ def run_tests(args,
     if args.skip_test_run:
         return
 
-    # Set default per-test timeout to 15 minutes (in milliseconds).
-    per_test_timeout = 15*60*1000
+    # Set default per-test timeout to 30 minutes (in milliseconds).
+    per_test_timeout = 30*60*1000
 
     # Setup the environment
     if args.long_gc: