diff --git a/azure-pipelines-PR.yml b/azure-pipelines-PR.yml
index ae2ceb05d6c..6b31c52d38a 100644
--- a/azure-pipelines-PR.yml
+++ b/azure-pipelines-PR.yml
@@ -845,3 +845,9 @@ stages:
           displayName: FSharpDataGraphQL_DesignTimeProvider_Packaging
           useVmImage: $(LinuxMachineQueueName)
           usePool: $(DncEngPublicBuildPool)
+        # Chiron (chiron-6) exercises Aether 8.2.0 inline SRTP optics, reproducing the SDK 10.0.400 legacy inline-metadata
+        # regression (#20253, fixed by #20260): the miscompile throws NotSupportedException at run time, so run the tests.
+        - repo: xyncro/chiron
+          commit: 94cf9db1793a1bd0e6e0b69efadcfb37368a6428
+          buildScript: dotnet test tests/Chiron.Tests/Chiron.Tests.fsproj -c Release -p:AssetTargetFallback=net461 -p:RollForward=Major --filter FullyQualifiedName~Optic
+          displayName: Chiron_Aether_Inline_SRTP