diff --git a/src/tests/JIT/Directed/lifetime/lifetime1.csproj b/src/tests/JIT/Directed/lifetime/lifetime1.csproj
index 4c87787611dad0..8acdf54b815fec 100644
--- a/src/tests/JIT/Directed/lifetime/lifetime1.csproj
+++ b/src/tests/JIT/Directed/lifetime/lifetime1.csproj
@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!-- Needed for GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <CLRTestPriority>1</CLRTestPriority>
   </PropertyGroup>
   <PropertyGroup>
diff --git a/src/tests/JIT/Directed/lifetime/lifetime2.csproj b/src/tests/JIT/Directed/lifetime/lifetime2.csproj
index 32332ad8fb23ee..7913879515ebfc 100644
--- a/src/tests/JIT/Directed/lifetime/lifetime2.csproj
+++ b/src/tests/JIT/Directed/lifetime/lifetime2.csproj
@@ -1,7 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <!-- Needed for JitOptimizationSensitive -->
+    <!-- Needed for JitOptimizationSensitive, GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
     <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <CLRTestPriority>1</CLRTestPriority>
   </PropertyGroup>
   <PropertyGroup>
diff --git a/src/tests/JIT/Directed/pinvoke/preemptive_cooperative.ilproj b/src/tests/JIT/Directed/pinvoke/preemptive_cooperative.ilproj
index 4f8c34a3491625..baffce8b8094cf 100644
--- a/src/tests/JIT/Directed/pinvoke/preemptive_cooperative.ilproj
+++ b/src/tests/JIT/Directed/pinvoke/preemptive_cooperative.ilproj
@@ -1,7 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk.IL">
   <PropertyGroup>
-    <!-- Needed for CLRTestTargetUnsupported -->
+    <!-- Needed for CLRTestTargetUnsupported, GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
     <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <CLRTestPriority>1</CLRTestPriority>
     <!-- Test unsupported outside of windows -->
     <CLRTestTargetUnsupported Condition="'$(TargetsWindows)' != 'true'">true</CLRTestTargetUnsupported>
diff --git a/src/tests/JIT/Regression/CLR-x86-JIT/V1-M09.5-PDC/b12795/b12795.csproj b/src/tests/JIT/Regression/CLR-x86-JIT/V1-M09.5-PDC/b12795/b12795.csproj
index e3c43ccd560571..b6d7d466efdadc 100644
--- a/src/tests/JIT/Regression/CLR-x86-JIT/V1-M09.5-PDC/b12795/b12795.csproj
+++ b/src/tests/JIT/Regression/CLR-x86-JIT/V1-M09.5-PDC/b12795/b12795.csproj
@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!-- Needed for GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <CLRTestPriority>1</CLRTestPriority>
   </PropertyGroup>
   <PropertyGroup>
diff --git a/src/tests/JIT/Regression/CLR-x86-JIT/V1-M12-Beta2/b38269/b38269.csproj b/src/tests/JIT/Regression/CLR-x86-JIT/V1-M12-Beta2/b38269/b38269.csproj
index e3c43ccd560571..b6d7d466efdadc 100644
--- a/src/tests/JIT/Regression/CLR-x86-JIT/V1-M12-Beta2/b38269/b38269.csproj
+++ b/src/tests/JIT/Regression/CLR-x86-JIT/V1-M12-Beta2/b38269/b38269.csproj
@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!-- Needed for GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <CLRTestPriority>1</CLRTestPriority>
   </PropertyGroup>
   <PropertyGroup>
diff --git a/src/tests/JIT/Regression/CLR-x86-JIT/dev10/b400791/_b400971b400971.csproj b/src/tests/JIT/Regression/CLR-x86-JIT/dev10/b400791/_b400971b400971.csproj
index 7793dd17be43df..013b6722b7f7be 100644
--- a/src/tests/JIT/Regression/CLR-x86-JIT/dev10/b400791/_b400971b400971.csproj
+++ b/src/tests/JIT/Regression/CLR-x86-JIT/dev10/b400791/_b400971b400971.csproj
@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!-- Needed for GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <CLRTestPriority>1</CLRTestPriority>
   </PropertyGroup>
   <PropertyGroup>
diff --git a/src/tests/JIT/Regression/CLR-x86-JIT/v2.1/DDB/b202743/b202743.csproj b/src/tests/JIT/Regression/CLR-x86-JIT/v2.1/DDB/b202743/b202743.csproj
index 3b34a5b29b1c10..7e6c2ca689721a 100644
--- a/src/tests/JIT/Regression/CLR-x86-JIT/v2.1/DDB/b202743/b202743.csproj
+++ b/src/tests/JIT/Regression/CLR-x86-JIT/v2.1/DDB/b202743/b202743.csproj
@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!-- Needed for GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <CLRTestPriority>1</CLRTestPriority>
   </PropertyGroup>
   <PropertyGroup>
diff --git a/src/tests/JIT/Regression/JitBlue/Runtime_4781/Runtime_4781.csproj b/src/tests/JIT/Regression/JitBlue/Runtime_4781/Runtime_4781.csproj
index 501217e4d86892..e8bb122e09c406 100644
--- a/src/tests/JIT/Regression/JitBlue/Runtime_4781/Runtime_4781.csproj
+++ b/src/tests/JIT/Regression/JitBlue/Runtime_4781/Runtime_4781.csproj
@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!-- Needed for GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <DebugType>None</DebugType>
     <Optimize>True</Optimize>
   </PropertyGroup>
diff --git a/src/tests/JIT/Regression/JitBlue/Runtime_4781/Runtime_4781_1.csproj b/src/tests/JIT/Regression/JitBlue/Runtime_4781/Runtime_4781_1.csproj
index 1199d8f1cfdf7a..f4cc66b90e5e6f 100644
--- a/src/tests/JIT/Regression/JitBlue/Runtime_4781/Runtime_4781_1.csproj
+++ b/src/tests/JIT/Regression/JitBlue/Runtime_4781/Runtime_4781_1.csproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <!-- Needed for GCStressIncompatible -->
+    <!-- Needed for GCStressIncompatible, GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
     <RequiresProcessIsolation>true</RequiresProcessIsolation>
   </PropertyGroup>
   <PropertyGroup>
diff --git a/src/tests/JIT/Regression/Regression_1.csproj b/src/tests/JIT/Regression/Regression_1.csproj
index 9df9bd0c23775b..0c944fa1a6ffb9 100644
--- a/src/tests/JIT/Regression/Regression_1.csproj
+++ b/src/tests/JIT/Regression/Regression_1.csproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <NumberOfStripesToUseInStress>10</NumberOfStripesToUseInStress>
+  </PropertyGroup>
   <ItemGroup>
     <MergedWrapperProjectReference Include="CLR-x86-*/**/*.??proj" />
     <MergedWrapperProjectReference Remove="*/**/*_d.??proj" />
diff --git a/src/tests/JIT/Regression/Regression_4.csproj b/src/tests/JIT/Regression/Regression_4.csproj
index 72e9455e92e94b..9e6aa372a15aed 100644
--- a/src/tests/JIT/Regression/Regression_4.csproj
+++ b/src/tests/JIT/Regression/Regression_4.csproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <NumberOfStripesToUseInStress>10</NumberOfStripesToUseInStress>
+  </PropertyGroup>
   <ItemGroup>
     <MergedWrapperProjectReference Include="VS-ia64-JIT/**/*.??proj" />
     <MergedWrapperProjectReference Remove="*/**/*_d.??proj" />
diff --git a/src/tests/baseservices/threading/regressions/30032/30032.csproj b/src/tests/baseservices/threading/regressions/30032/30032.csproj
index 1e74cf137db137..5b1785f2a59a3c 100644
--- a/src/tests/baseservices/threading/regressions/30032/30032.csproj
+++ b/src/tests/baseservices/threading/regressions/30032/30032.csproj
@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!-- Needed for GC.WaitForPendingFinalizers -->
+    <!-- See https://github.com/dotnet/runtime/issues/68529 -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+
     <CLRTestPriority>1</CLRTestPriority>
   </PropertyGroup>
   <ItemGroup>
diff --git a/src/tests/baseservices/threading/threading_group1.csproj b/src/tests/baseservices/threading/threading_group1.csproj
index 15e01f3e3ae1ca..739bbcc969f969 100644
--- a/src/tests/baseservices/threading/threading_group1.csproj
+++ b/src/tests/baseservices/threading/threading_group1.csproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <NumberOfStripesToUseInStress>10</NumberOfStripesToUseInStress>
+  </PropertyGroup>
   <ItemGroup>
     <MergedWrapperProjectReference Include="commitstackonlyasneeded/**/*.??proj" />
     <MergedWrapperProjectReference Include="coverage/**/*.??proj" />