diff --git a/eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml b/eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml
index e9d21e31b1b4bb..164485e7d00770 100644
--- a/eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml
+++ b/eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml
@@ -66,7 +66,7 @@ extends:
             testGroup: innerloop
             isSingleFile: true
             nameSuffix: NativeAOT_Libs
-            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) /p:TestNativeAot=true /p:ArchiveTests=true
+            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) /p:TestNativeAot=true /p:ArchiveTests=true /p:IlcUseServerGc=false
             timeoutInMinutes: 300 # doesn't normally take this long, but I've seen Helix queues backed up for 160 minutes
             # extra steps, run tests
             postBuildSteps:
@@ -91,7 +91,7 @@ extends:
             testGroup: innerloop
             isSingleFile: true
             nameSuffix: NativeAOT_Checked_Libs
-            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true
+            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:IlcUseServerGc=false
             timeoutInMinutes: 360
             # extra steps, run tests
             postBuildSteps:
@@ -116,7 +116,7 @@ extends:
             testGroup: innerloop
             isSingleFile: true
             nameSuffix: NativeAOT_Checked_Libs_SizeOpt
-            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:OptimizationPreference=Size
+            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:OptimizationPreference=Size /p:IlcUseServerGc=false
             timeoutInMinutes: 240
             # extra steps, run tests
             postBuildSteps:
@@ -141,7 +141,7 @@ extends:
             testGroup: innerloop
             isSingleFile: true
             nameSuffix: NativeAOT_Checked_Libs_SpeedOpt
-            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:OptimizationPreference=Speed
+            buildArgs: -s clr.aot+host.native+libs+libs.tests -c $(_BuildConfig) -rc Checked /p:TestNativeAot=true /p:ArchiveTests=true /p:OptimizationPreference=Speed /p:IlcUseServerGc=false
             timeoutInMinutes: 240
             # extra steps, run tests
             postBuildSteps:
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index 05605d51f70069..8ae6fb506a012c 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -429,6 +429,10 @@
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.IO.Ports\tests\System.IO.Ports.Tests.csproj"
                       Condition="'$(TargetOS)' != 'windows'" />
 
+    <!-- Getting OOM killed, needs investigation why it uses 10 GB of memory -->
+    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.SourceGeneration.Tests\System.Text.Json.SourceGeneration.Roslyn4.4.Tests.csproj"
+                      Condition="'$(TargetOS)' == 'linux'" />
+
     <!-- Not applicable to NativeAOT -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.HostFactoryResolver\tests\Microsoft.Extensions.HostFactoryResolver.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Runtime.Loader\tests\DefaultContext\System.Runtime.Loader.DefaultContext.Tests.csproj" />