diff --git a/src/tests/baseservices/exceptions/simple/ParallelCrash.csproj b/src/tests/baseservices/exceptions/simple/ParallelCrash.csproj
index a92e49e73a282..bbad3fdf834bf 100644
--- a/src/tests/baseservices/exceptions/simple/ParallelCrash.csproj
+++ b/src/tests/baseservices/exceptions/simple/ParallelCrash.csproj
@@ -4,6 +4,8 @@
     <CLRTestPriority>1</CLRTestPriority>
     <CLRTestExitCode>134</CLRTestExitCode>
     <CLRTestExitCode Condition="'$(TestWrapperTargetsWindows)' == 'true'">-2146232797</CLRTestExitCode>
+    <!-- Temporarily disabled due to https://github.com/dotnet/runtime/issues/80356 -->
+    <GCStressIncompatible>true</GCStressIncompatible>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="ParallelCrash.cs" />
diff --git a/src/tests/baseservices/exceptions/simple/ParallelCrashMainThread.csproj b/src/tests/baseservices/exceptions/simple/ParallelCrashMainThread.csproj
index 67d53cb9df7c7..d7ad43abbd027 100644
--- a/src/tests/baseservices/exceptions/simple/ParallelCrashMainThread.csproj
+++ b/src/tests/baseservices/exceptions/simple/ParallelCrashMainThread.csproj
@@ -6,5 +6,7 @@
     <CLRTestExecutionArguments>1</CLRTestExecutionArguments>
     <CLRTestExitCode>134</CLRTestExitCode>
     <CLRTestExitCode Condition="'$(TestWrapperTargetsWindows)' == 'true'">-2146232797</CLRTestExitCode>
+    <!-- Temporarily disabled due to https://github.com/dotnet/runtime/issues/80356 -->
+    <GCStressIncompatible>true</GCStressIncompatible>
   </PropertyGroup>
 </Project>