diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index 0da59f64f4..c7cfc3fd15 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -5,7 +5,7 @@ steps:
     env:
       RUBY_VERSION: "{{ matrix.ruby }}"
       TEST_SUITE: "{{ matrix.suite }}"
-      STACK_VERSION: 8.18.0-SNAPSHOT
+      STACK_VERSION: 8.19.0-SNAPSHOT
       TRANSPORT_VERSION: "{{ matrix.transport }}"
       RUBY_SOURCE: "{{ matrix.ruby_source }}"
       QUIET: false
@@ -67,8 +67,8 @@ steps:
       provider: "gcp"
     env:
       RUBY_VERSION: "3.4"
-      STACK_VERSION: 8.18.0-SNAPSHOT
-      ES_YAML_TESTS_BRANCH: 8.x
+      STACK_VERSION: 8.19.0-SNAPSHOT
+      ES_YAML_TESTS_BRANCH: "8.19"
       TRANSPORT_VERSION: "8.3"
       RUBY_SOURCE: "ruby"
       TEST_SUITE: "platinum"
diff --git a/.github/workflows/8.x.yml b/.github/workflows/8.x.yml
index 3da64876ce..d0ba113aee 100644
--- a/.github/workflows/8.x.yml
+++ b/.github/workflows/8.x.yml
@@ -26,7 +26,7 @@ jobs:
         sudo sysctl -w vm.max_map_count=262144
     - uses: elastic/elastic-github-actions/elasticsearch@master
       with:
-        stack-version: 8.18.0-SNAPSHOT
+        stack-version: 8.19.0-SNAPSHOT
         security-enabled: false
     - uses: ruby/setup-ruby@v1
       with:
@@ -40,4 +40,4 @@ jobs:
     - name: elasticsearch
       run: cd elasticsearch && bundle exec rake test:all
     - name: elasticsearch-api
-      run: rake es:download_artifacts[8.18.0-SNAPSHOT] && cd elasticsearch-api && bundle exec rake test:spec test:platinum:unit
+      run: rake es:download_artifacts[8.19.0-SNAPSHOT] && cd elasticsearch-api && bundle exec rake test:spec test:platinum:unit
diff --git a/.github/workflows/otel.yml b/.github/workflows/otel.yml
index 131458042f..bcd39c02a9 100644
--- a/.github/workflows/otel.yml
+++ b/.github/workflows/otel.yml
@@ -28,7 +28,7 @@ jobs:
           sudo sysctl -w vm.max_map_count=262144
       - uses: elastic/elastic-github-actions/elasticsearch@master
         with:
-          stack-version: 8.18.0-SNAPSHOT
+          stack-version: 8.19.0-SNAPSHOT
           security-enabled: false
       - uses: ruby/setup-ruby@v1
         with:
@@ -42,4 +42,4 @@ jobs:
       - name: elasticsearch
         run: cd elasticsearch && bundle exec rake test:all
       - name: elasticsearch-api
-        run: rake es:download_artifacts[8.18.0-SNAPSHOT] && cd elasticsearch-api && bundle exec rake test:spec test:platinum:unit
+        run: rake es:download_artifacts[8.19.0-SNAPSHOT] && cd elasticsearch-api && bundle exec rake test:spec test:platinum:unit
diff --git a/elasticsearch-api/spec/rest_api/skipped_tests_free.yml b/elasticsearch-api/spec/rest_api/skipped_tests_free.yml
index a0d1b139c4..229f596650 100644
--- a/elasticsearch-api/spec/rest_api/skipped_tests_free.yml
+++ b/elasticsearch-api/spec/rest_api/skipped_tests_free.yml
@@ -243,3 +243,6 @@
 -
   :file: 'nodes.stats/11_indices_metrics.yml'
   :description: 'indices mappings exact count test for indices level'
+-
+  :file: 'tsdb/160_nested_fields.yml'
+  :description: '*'