diff --git a/.github/workflows/test-ruby.yml b/.github/workflows/test-ruby.yml
index 45dc8a0deb..2bfa59e6b1 100644
--- a/.github/workflows/test-ruby.yml
+++ b/.github/workflows/test-ruby.yml
@@ -264,8 +264,8 @@ jobs:
         ports:
           - 6379:6379
 
-      search:
-        image: ${{ matrix.search-image }}
+      elasticsearch:
+        image: ${{ contains(matrix.search-image, 'elasticsearch') && matrix.search-image || '' }}
         env:
           discovery.type: single-node
           xpack.security.enabled: false
@@ -277,6 +277,20 @@ jobs:
         ports:
           - 9200:9200
 
+      opensearch:
+        image: ${{ contains(matrix.search-image, 'opensearch') && matrix.search-image || '' }}
+        env:
+          discovery.type: single-node
+          DISABLE_INSTALL_DEMO_CONFIG: true
+          DISABLE_SECURITY_PLUGIN: true
+        options: >-
+          --health-cmd "curl http://localhost:9200/_cluster/health"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 10
+        ports:
+          - 9200:9200
+
     env:
       DB_HOST: localhost
       DB_USER: postgres
@@ -300,6 +314,8 @@ jobs:
         include:
           - ruby-version: '.ruby-version'
             search-image: docker.elastic.co/elasticsearch/elasticsearch:8.10.2
+          - ruby-version: '.ruby-version'
+            search-image: opensearchproject/opensearch:2
 
     steps:
       - uses: actions/checkout@v4
diff --git a/config/application.rb b/config/application.rb
index 402c7f0614..07b50ca036 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -40,6 +40,7 @@ require_relative '../lib/mastodon/rack_middleware'
 require_relative '../lib/public_file_server_middleware'
 require_relative '../lib/devise/strategies/two_factor_ldap_authenticatable'
 require_relative '../lib/devise/strategies/two_factor_pam_authenticatable'
+require_relative '../lib/elasticsearch/client_extensions'
 require_relative '../lib/chewy/settings_extensions'
 require_relative '../lib/chewy/index_extensions'
 require_relative '../lib/chewy/strategy/mastodon'
diff --git a/lib/elasticsearch/client_extensions.rb b/lib/elasticsearch/client_extensions.rb
new file mode 100644
index 0000000000..700bfa4a1c
--- /dev/null
+++ b/lib/elasticsearch/client_extensions.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Elasticsearch
+  module ClientExtensions
+    def verify_elasticsearch
+      @verified = true
+    end
+  end
+end
+
+Elasticsearch::Client.prepend(Elasticsearch::ClientExtensions)