diff --git a/.github/opensearch-cluster/docker-compose.yml b/.github/opensearch-cluster/docker-compose.yml
index 48a008634..e2ea4b2de 100644
--- a/.github/opensearch-cluster/docker-compose.yml
+++ b/.github/opensearch-cluster/docker-compose.yml
@@ -4,10 +4,10 @@ services:
   opensearch-cluster:
     image: ${OPENSEARCH_DOCKER_HUB_PROJECT:-opensearchproject}/opensearch:${OPENSEARCH_VERSION:-latest}${OPENSEARCH_DOCKER_REF}
     ports:
-      - '9200:9200'
-      - '9600:9600'
+      - 9200:9200
+      - 9600:9600
     environment:
-      - 'OPENSEARCH_INITIAL_ADMIN_PASSWORD=${OPENSEARCH_PASSWORD:-myStrongPassword123!}'
+      - OPENSEARCH_INITIAL_ADMIN_PASSWORD=${OPENSEARCH_PASSWORD:-myStrongPassword123!}
       - OPENSEARCH_JAVA_OPTS=${OPENSEARCH_JAVA_OPTS}
       - discovery.type=single-node
       - path.repo=/tmp/opensearch/repo
diff --git a/.github/workflows/test-spec.yml b/.github/workflows/test-spec.yml
index 86590741a..80f7577f8 100644
--- a/.github/workflows/test-spec.yml
+++ b/.github/workflows/test-spec.yml
@@ -23,12 +23,17 @@ jobs:
     strategy:
       matrix:
         entry:
-          - {version: 1.3.17, admin_password: admin}
-          - {version: 2.0.0, admin_password: admin}
-          - {version: 2.15.0}
+          - version: 1.3.17
+            admin_password: admin
+          - version: 2.0.0
+            admin_password: admin
+          - version: 2.15.0
           - version: 2.16.0
             hub: opensearchstaging
-            ref: '@sha256:50fbfe3b95c41e92a113ada3e80513ba4524dfc8a25dc6aaeff2bbe1e1145d5f'
+            ref: '@sha256:bcd7f5d5d30231f24f266064248cc8d3306574948190f7bf93016dff29acf17e'
+          - version: 3.0.0
+            hub: opensearchstaging
+            ref: '@sha256:db1918b2b8f7ef6c22dd6ff54a0640877c3d395a392a53864745024933981e3b'
 
     name: test-opensearch-spec (version=${{ matrix.entry.version }}, hub=${{ matrix.entry.hub || 'opensearchproject' }})
     runs-on: ubuntu-latest
@@ -56,6 +61,11 @@ jobs:
         working-directory: .github/opensearch-cluster
         run: docker compose up -d
 
+      - name: Get Container ID
+        id: container
+        run: |
+          echo "CONTAINER_ID=$(docker ps -aqf "ancestor=opensearchproject/opensearch:${{ matrix.entry.version }}")" >> $GITHUB_OUTPUT
+
       - name: Run Tests
         run: |
           npm run test:spec -- \
@@ -63,6 +73,12 @@ jobs:
             --opensearch-version=${{ matrix.entry.version }} \
             --coverage coverage/test-spec-coverage-${{ matrix.entry.version }}.json
 
+      - name: Get Container Logs
+        if: failure() && steps.container.outputs.CONTAINER_ID
+        run: |
+          echo Dumping logs from ${{ steps.container.outputs.CONTAINER_ID }} ...
+          docker logs ${{ steps.container.outputs.CONTAINER_ID }}
+
       - name: Upload Test Coverage Results
         uses: actions/upload-artifact@v4
         with:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e24e482b8..dadcbee4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -59,6 +59,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Added a warning on mulitple paths being tested in the same file ([#452](https://github.com/opensearch-project/opensearch-api-specification/pull/452))
 - Added `/_plugins/_query/settings` ([#456](https://github.com/opensearch-project/opensearch-api-specification/pull/456))
 - Added `/_plugins/_ppl`, `explain` and `stats` ([#460](https://github.com/opensearch-project/opensearch-api-specification/pull/460))
+- Added tests against OpenSearch 3.0 ([#459](https://github.com/opensearch-project/opensearch-api-specification/pull/459))
 
 ### Changed
 
diff --git a/spec/schemas/nodes._common.yaml b/spec/schemas/nodes._common.yaml
index ee172b93e..59378e88a 100644
--- a/spec/schemas/nodes._common.yaml
+++ b/spec/schemas/nodes._common.yaml
@@ -1092,6 +1092,9 @@ components:
           $ref: '#/components/schemas/ShardSearchBackpressureTaskResourceTrackerStats'
         cancellation_stats:
           $ref: '#/components/schemas/ShardSearchBackpressureTaskCancellationStats'
+        completion_count:
+          x-version-added: '3.0'
+          type: number
     ShardSearchBackpressureTaskResourceTrackerStats:
       type: object
       properties:
diff --git a/tests/ingest/pipeline.yaml b/tests/ingest/pipeline.yaml
index c10c4f327..ee8e539ea 100644
--- a/tests/ingest/pipeline.yaml
+++ b/tests/ingest/pipeline.yaml
@@ -6,7 +6,7 @@ epilogues:
   - path: /_ingest/pipeline/books_pipeline
     method: DELETE
     status: [200, 404]
-version: '>= 2.11'
+version: '>= 2.11, < 3.0' # TODO: re-enable using a 3.0 build with the neural-search plugin
 chapters:
   - synopsis: Create ingest pipeline for text embedding.
     path: /_ingest/pipeline/{id}
diff --git a/tests/sql/close.yaml b/tests/sql/close.yaml
index 8df8a4c01..df2910ae9 100644
--- a/tests/sql/close.yaml
+++ b/tests/sql/close.yaml
@@ -22,7 +22,13 @@ prologues:
     method: POST
     parameters:
       index: books
-  - id: query_sql
+  - path: _plugins/_query/settings
+    method: PUT
+    request_body:
+      payload:
+        transient:
+          plugins.query.memory_limit: 100%
+  - id: sql_query
     path: /_plugins/_sql
     method: POST
     request_body:
@@ -41,6 +47,6 @@ chapters:
     method: POST
     request_body:
       payload:
-        cursor: ${query_sql.cursor}
+        cursor: ${sql_query.cursor}
     response:
-      status: 200
\ No newline at end of file
+      status: 200
diff --git a/tests/sql/explain.yaml b/tests/sql/explain.yaml
index 16ea254f8..3679dcb29 100644
--- a/tests/sql/explain.yaml
+++ b/tests/sql/explain.yaml
@@ -7,6 +7,12 @@ prologues:
     method: PUT
     request_body:
       payload: {}
+  - path: _plugins/_query/settings
+    method: PUT
+    request_body:
+      payload:
+        transient:
+          plugins.query.memory_limit: 100%
 epilogues:
   - path: /books
     method: DELETE
diff --git a/tests/sql/query.yaml b/tests/sql/query.yaml
index 3111d0d64..e66942606 100644
--- a/tests/sql/query.yaml
+++ b/tests/sql/query.yaml
@@ -9,6 +9,12 @@ prologues:
       index: books
     request_body:
       payload: {}
+  - path: _plugins/_query/settings
+    method: PUT
+    request_body:
+      payload:
+        transient:
+          plugins.query.memory_limit: 100%
 epilogues:
   - path: /books
     method: DELETE