diff --git a/.github/wait_for_es.php b/.github/wait_for_opensearch.php
similarity index 78%
rename from .github/wait_for_es.php
rename to .github/wait_for_opensearch.php
index 10c6303ac..fb252a246 100644
--- a/.github/wait_for_es.php
+++ b/.github/wait_for_opensearch.php
@@ -11,7 +11,8 @@
     try {
         $client = ClientBuilder::create()->build();
         $client->ping();
-        echo 'Is up and running' . PHP_EOL;
+        $info = $client->info();
+        echo 'OpenSearch ' . $info['version']['number'] . ' is up and running' . PHP_EOL;
         exit(0);
     } catch (Throwable $e) {
         if ($retries === $maxRetries) {
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 49d1fd26b..831aba370 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,12 +12,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
-      - name: Use PHP 8.1
+      - name: Use PHP 8.2
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.1
+          php-version: 8.2
           extensions: yaml, zip, curl
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -35,12 +35,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
-      - name: Use PHP 8.1
+      - name: Use PHP 8.2
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.1
+          php-version: 8.2
           extensions: yaml, zip, curl
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -58,21 +58,22 @@ jobs:
     runs-on: ubuntu-latest
     services:
       search-server:
-        image: opensearchproject/opensearch:2.2.1
+        image: opensearchproject/opensearch:2.13.0
         ports:
           - 9200:9200
         env:
           discovery.type: single-node
-          plugins.security.disabled: 'true'
+          plugins.security.disabled: true
+          OPENSEARCH_INITIAL_ADMIN_PASSWORD: myStrongPassword123!
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
-      - name: Use PHP 8.1
+      - name: Use PHP 8.2
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.1
+          php-version: 8.2
           extensions: yaml, zip, curl, pcov
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -82,7 +83,7 @@ jobs:
           composer install --prefer-dist
 
       - name: Wait for Search server
-        run: php ./.github/wait_for_es.php
+        run: php ./.github/wait_for_opensearch.php
 
       - name: PHPUnit
         run: |
@@ -112,7 +113,7 @@ jobs:
           - windows-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Use PHP ${{ matrix.php-version }}
       uses: shivammathur/setup-php@v2
@@ -130,8 +131,8 @@ jobs:
       run: |
         composer run unit
 
-  integration-test:
-    name: Tntegration Test
+  integration-test-elasticsearch:
+    name: Tntegration Test (Elasticsearch)
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -140,12 +141,109 @@ jobs:
           - ubuntu-latest
         search-server-image:
           - docker.elastic.co/elasticsearch/elasticsearch-oss:7.10.0
+    services:
+      search-server:
+        image: ${{ matrix.search-server-image }}
+        ports:
+          - 9200:9200
+        env:
+          discovery.type: single-node
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Use PHP 8.2
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: 8.2
+        extensions: yaml, zip, curl
+      env:
+        COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+   
+    - name: Install dependencies
+      run: |
+        composer install --prefer-dist
+
+    - name: Wait for Search server
+      run: php ./.github/wait_for_opensearch.php
+
+    - name: Integration tests
+      run: |
+        composer run integration
+      env:
+        OPENSEARCH_URL: 'http://localhost:9200'
+
+  integration-test-opensearch:
+    name: Tntegration Test (OpenSearch)
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+        search-server-image:
           - opensearchproject/opensearch:1.1.0
           - opensearchproject/opensearch:1.2.4
-          - opensearchproject/opensearch:1.3.6
+          - opensearchproject/opensearch:1.3.15
+          - opensearchproject/opensearch:2.0.1
           - opensearchproject/opensearch:2.1.0
           - opensearchproject/opensearch:2.2.1
           - opensearchproject/opensearch:2.5.0
+          - opensearchproject/opensearch:2.3.0
+          - opensearchproject/opensearch:2.4.1
+          - opensearchproject/opensearch:2.5.0
+          - opensearchproject/opensearch:2.6.0
+          - opensearchproject/opensearch:2.7.0
+          - opensearchproject/opensearch:2.8.0
+          - opensearchproject/opensearch:2.9.0
+          - opensearchproject/opensearch:2.10.0
+          - opensearchproject/opensearch:2.11.1
+    services:
+      search-server:
+        image: ${{ matrix.search-server-image }}
+        ports:
+          - 9200:9200
+        env:
+          discovery.type: single-node
+          plugins.security.disabled: true
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Use PHP 8.2
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: 8.2
+        extensions: yaml, zip, curl
+      env:
+        COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+   
+    - name: Install dependencies
+      run: |
+        composer install --prefer-dist
+
+    - name: Wait for Search server
+      run: php ./.github/wait_for_opensearch.php
+
+    - name: Integration tests
+      run: |
+        composer run integration
+      env:
+        OPENSEARCH_URL: 'http://localhost:9200'
+
+  integration-test-opensearch-strong-password:
+    name: Tntegration Test (OpenSearch w/Strong Password)
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+        search-server-image:
+          - opensearchproject/opensearch:2.12.0
+          - opensearchproject/opensearch:2.13.0
     services:
       search-server:
         image: ${{ matrix.search-server-image }}
@@ -153,16 +251,17 @@ jobs:
           - 9200:9200
         env:
           discovery.type: single-node
-          plugins.security.disabled: '${{ contains(matrix.search-server-image, ''opensearch'') && ''true'' || '''' }}'
+          plugins.security.disabled: true
+          OPENSEARCH_INITIAL_ADMIN_PASSWORD: myStrongPassword123!
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
-    - name: Use PHP 8.1
+    - name: Use PHP 8.2
       uses: shivammathur/setup-php@v2
       with:
-        php-version: 8.1
+        php-version: 8.2
         extensions: yaml, zip, curl
       env:
         COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -172,7 +271,7 @@ jobs:
         composer install --prefer-dist
 
     - name: Wait for Search server
-      run: php ./.github/wait_for_es.php
+      run: php ./.github/wait_for_opensearch.php
 
     - name: Integration tests
       run: |
diff --git a/.github/workflows/test_unreleased.yml b/.github/workflows/test_unreleased.yml
index 43dfb6433..ac03cedb5 100644
--- a/.github/workflows/test_unreleased.yml
+++ b/.github/workflows/test_unreleased.yml
@@ -14,37 +14,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        entry:
-          - { opensearch_ref: '1.x' }
-          - { opensearch_ref: '2.0' }
-          - { opensearch_ref: '2.x' }
-          - { opensearch_ref: 'main' }
+        opensearch_ref: [ '1.x', '2.x', '2.0', 'main' ]
     steps:
-      - name: Checkout OpenSearch
-        uses: actions/checkout@v2
-        with:
-          repository: opensearch-project/OpenSearch
-          ref: ${{ matrix.entry.opensearch_ref }}
-          path: opensearch
-
-      - name: Assemble OpenSearch
-        run: |
-          cd opensearch
-          ./gradlew assemble
-        # This step runs the docker image generated during gradle assemble in OpenSearch. It is tagged as opensearch:test.
-        # Reference: https://github.com/opensearch-project/OpenSearch/blob/2.0/distribution/docker/build.gradle#L190
-      - name: Run Docker Image
-        run: |
-          docker run -p 9200:9200 -p 9600:9600 -d -e "discovery.type=single-node" -e "bootstrap.memory_lock=true" opensearch:test
-          sleep 90
-      
       - name: Checkout PHP Client
         uses: actions/checkout@v2
 
-      - name: Use PHP 8.1
+      - name: Use PHP 8.2
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.1
+          php-version: 8.2
           extensions: yaml, zip, curl
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -53,8 +31,45 @@ jobs:
         run: |
           composer install --prefer-dist
 
+      - name: Checkout OpenSearch
+        uses: actions/checkout@v3
+        with:
+          repository: opensearch-project/OpenSearch
+          ref: ${{ matrix.opensearch_ref }}
+          path: opensearch
+
+      - name: Get OpenSearch branch top
+        id: get-key
+        working-directory: opensearch
+        run: echo key=`git log -1 --format='%H'` >> $GITHUB_OUTPUT
+
+      - name: Restore cached build
+        id: cache-restore
+        uses: actions/cache/restore@v3
+        with:
+          path: opensearch/distribution/archives/linux-tar/build/distributions
+          key: ${{ steps.get-key.outputs.key }}
+
+      - name: Assemble OpenSearch
+        if: steps.cache-restore.outputs.cache-hit != 'true'
+        working-directory: opensearch
+        run: ./gradlew :distribution:archives:linux-tar:assemble
+
+      - name: Save cached build
+        if: steps.cache-restore.outputs.cache-hit != 'true'
+        uses: actions/cache/save@v3
+        with:
+          path: opensearch/distribution/archives/linux-tar/build/distributions
+          key: ${{ steps.get-key.outputs.key }}
+
+      - name: Run OpenSearch
+        working-directory: opensearch/distribution/archives/linux-tar/build/distributions
+        run: |
+          tar xf opensearch-min-*
+          ./opensearch-*/bin/opensearch -d
+      
       - name: Wait for Search server
-        run: php ./.github/wait_for_es.php
+        run: php ./.github/wait_for_opensearch.php
 
       - name: Integration tests
         run: |
diff --git a/.github/workflows/update_docs.yml b/.github/workflows/update_docs.yml
index 623465e20..be4aaca6c 100644
--- a/.github/workflows/update_docs.yml
+++ b/.github/workflows/update_docs.yml
@@ -25,10 +25,10 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Use PHP 8.1
+      - name: Use PHP 8.2
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.1
+          php-version: 8.2
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec1eceebf..d1c66a194 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,36 +1,38 @@
 # CHANGELOG
+
 Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ## [Unreleased]
+
 ### Added
-- Added PHP 8.2 to the CI
-- Github workflow for changelog verification ([#92](https://github.com/opensearch-project/opensearch-php/pull/92))
+- Added a GitHub workflow for verifying CHANGELOG ([#92](https://github.com/opensearch-project/opensearch-php/pull/92))
 - Added class docs generator ([#96](https://github.com/opensearch-project/opensearch-php/pull/96))
 - Added support for Amazon OpenSearch Serverless SigV4 signing ([#119](https://github.com/opensearch-project/opensearch-php/pull/119))
 - Added `includePortInHostHeader` option to `ClientBuilder::fromConfig` ([#118](https://github.com/opensearch-project/opensearch-php/pull/118))
 - Added the `RefreshSearchAnalyzers` endpoint ([[#152](https://github.com/opensearch-project/opensearch-php/issues/152))
 - Added support for `format` parameter to specify the sql response format ([#161](https://github.com/opensearch-project/opensearch-php/pull/161))
-- Added ml commons model, model group and connector APIs ([#170](https://github.com/opensearch-project/opensearch-php/pull/170))
-- [Feature] Send raw json request ([#171](https://github.com/opensearch-project/opensearch-php/pull/177))
+- Added ml-commons model, model group and connector APIs ([#170](https://github.com/opensearch-project/opensearch-php/pull/170))
+- Added support for sending raw JSON requests ([#171](https://github.com/opensearch-project/opensearch-php/pull/177))
+- Added PHP 8.2 support ([#87](https://github.com/opensearch-project/opensearch-php/issues/87))
+- Added Windows and MacOS support ([#100](https://github.com/opensearch-project/opensearch-php/pull/100))
+- Added code coverage reporting ([#100](https://github.com/opensearch-project/opensearch-php/pull/100))
+- Added support for a custom signing service name for AWS SigV4 ([#117](https://github.com/opensearch-project/opensearch-php/pull/117))
+- Added support for OpenSearch 2.12 and 2.13 ([#180](https://github.com/opensearch-project/opensearch-php/pull/180))
 
 ### Changed
 
-- Added Windows and macOS jobs to CI
-- Added Coverage reporting to Codecov
-- Support a custom signing service name for AWS SigV4 ([#117](https://github.com/opensearch-project/opensearch-php/pull/117))
-
 ### Deprecated
 
 ### Removed
 
 ### Fixed
-- Updated backport helper version and add fix to backport workflow when tag is applied before closing PR ([#131](https://github.com/opensearch-project/opensearch-php/pull/131))
+
+- Fixed backport workflow when tag is applied before closing PR ([#131](https://github.com/opensearch-project/opensearch-php/pull/131))
 - Fixed host urls with trailing slash in the url ([#130](https://github.com/opensearch-project/opensearch-php/pull/140))
 - Fixed point-in-time APIs ([#142](https://github.com/opensearch-project/opensearch-php/pull/142))
-- Fixed bug in ClientBuilder where basic authentication is overridden by connection params ([#160](https://github.com/opensearch-project/opensearch-php/pull/160))
+- Fixed basic authentication being overridden by connection params in `ClientBuilder` ([#160](https://github.com/opensearch-project/opensearch-php/pull/160))
 - Fixed PHP warning in `Connection::tryDeserializeError()` for some error responses ([#167](https://github.com/opensearch-project/opensearch-php/issues/167))
 
 ### Security
 
-
 [Unreleased]: https://github.com/opensearch-project/opensearch-php/compare/2.0...HEAD
diff --git a/tests/Utility.php b/tests/Utility.php
index 5297eadc9..78a440071 100644
--- a/tests/Utility.php
+++ b/tests/Utility.php
@@ -42,7 +42,10 @@ public static function getHost(): ?string
         if (false !== $url) {
             return $url;
         }
-        return 'https://admin:admin@localhost:9200';
+
+        $password = getenv('OPENSEARCH_INITIAL_ADMIN_PASSWORD') ?: 'admin';
+
+        return 'https://admin:' . $password . '@localhost:9200';
     }
 
     /**