diff --git a/eng/pipelines/libraries/helix-queues-setup.yml b/eng/pipelines/libraries/helix-queues-setup.yml
index e76da12f2a91ec..250f77708d0391 100644
--- a/eng/pipelines/libraries/helix-queues-setup.yml
+++ b/eng/pipelines/libraries/helix-queues-setup.yml
@@ -70,14 +70,6 @@ jobs:
         # Limiting interp runs as we don't need as much coverage.
         - (Debian.13.Amd64.Open)Ubuntu.2204.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:debian-13-helix-amd64
 
-    # Linux s390x
-    - ${{ if eq(parameters.platform, 'linux_s390x') }}:
-        - Ubuntu.2004.S390X.Experimental.Open
-
-    # Linux PPC64le
-    - ${{ if eq(parameters.platform, 'linux_ppc64le') }}:
-        - Ubuntu.2204.PPC64le.Experimental.Open
-
     # OSX arm64
     - ${{ if eq(parameters.platform, 'osx_arm64') }}:
       - osx.13.arm64.open
diff --git a/eng/pipelines/runtime-community.yml b/eng/pipelines/runtime-community.yml
index 127e548f7a0fea..10bb29c595b38c 100644
--- a/eng/pipelines/runtime-community.yml
+++ b/eng/pipelines/runtime-community.yml
@@ -71,17 +71,6 @@ extends:
                 eq(stageDependencies.EvaluatePaths.evaluate_paths.outputs['SetPathVars_libraries.containsChange'], true),
                 eq(stageDependencies.EvaluatePaths.evaluate_paths.outputs['SetPathVars_mono_excluding_wasm.containsChange'], true),
                 eq(variables['isRollingBuild'], true))
-            # extra steps, run tests
-            postBuildSteps:
-              - template: /eng/pipelines/libraries/helix.yml
-                parameters:
-                  creator: dotnet-bot
-                  testRunNamePrefixSuffix: Mono_$(_BuildConfig)
-                  condition: >-
-                    or(
-                    eq(variables['librariesContainsChange'], true),
-                    eq(variables['monoContainsChange'], true),
-                    eq(variables['isRollingBuild'], true))
 
       #
       # Build the whole product using Mono