diff --git a/.buildkite/pull-request-test-matrix.yml b/.buildkite/pull-request-test-matrix.yml
index 678bf9f5..7b3cd8fc 100644
--- a/.buildkite/pull-request-test-matrix.yml
+++ b/.buildkite/pull-request-test-matrix.yml
@@ -10,6 +10,15 @@
     - 8.current
     - 8.next
     - 8.future
+9.x:
+  releases:
+    - 9.previous
+    - 9.current
+  snapshots:
+    - 9.previous
+    - 9.current
+    - 9.next
+    - 9.future
 main:
   releases:
     - 9.previous