diff --git a/Makefile b/Makefile
index 84bc7e4..797788b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,17 @@
-.PHONY: test-pg test-mysql
+.PHONY: test-sqlite test-pg test-mysql
+
+test-sqlite:
+	appraisal rake test
 
 test-pg:
 	docker compose up -d pg
 	sleep 10 # give some time for the service to start
-	DATABASE_URL=postgres://with_advisory:with_advisory_pass@localhost/with_advisory_lock_test appraisal activerecord-7.1 rake test
+	DATABASE_URL=postgres://with_advisory:with_advisory_pass@localhost/with_advisory_lock_test appraisal rake test
 
 test-mysql:
 	docker compose up -d mysql
 	sleep 10 # give some time for the service to start
-	DATABASE_URL=mysql2://with_advisory:with_advisory_pass@0.0.0.0:3306/with_advisory_lock_test appraisal activerecord-7.1 rake test
+	DATABASE_URL=mysql2://with_advisory:with_advisory_pass@0.0.0.0:3306/with_advisory_lock_test appraisal rake test
 
 
-test: test-pg test-mysql
\ No newline at end of file
+test: test-sqlite test-pg test-mysql
diff --git a/docker-compose.yml b/docker-compose.yml
index 11ca78b..2440305 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -17,4 +17,4 @@ services:
       MYSQL_RANDOM_ROOT_PASSWORD: "yes"
       MYSQL_ROOT_HOST: '%'
     ports:
-      - "3306:3306"
\ No newline at end of file
+      - "3306:3306"
diff --git a/lib/with_advisory_lock/database_adapter_support.rb b/lib/with_advisory_lock/database_adapter_support.rb
index dafd3ed..680bb68 100644
--- a/lib/with_advisory_lock/database_adapter_support.rb
+++ b/lib/with_advisory_lock/database_adapter_support.rb
@@ -3,9 +3,10 @@
 module WithAdvisoryLock
   class DatabaseAdapterSupport
     attr_reader :adapter_name
+
     def initialize(connection)
       @connection = connection
-      @adapter_name   = connection.adapter_name.downcase.to_sym
+      @adapter_name = connection.adapter_name.downcase.to_sym
     end
 
     def mysql?
@@ -17,7 +18,7 @@ def postgresql?
     end
 
     def sqlite?
-      [:sqlite3, :sqlite].include? adapter_name
+      %i[sqlite3 sqlite].include? adapter_name
     end
   end
 end
diff --git a/lib/with_advisory_lock/mysql.rb b/lib/with_advisory_lock/mysql.rb
index bdb35e7..9f2a810 100644
--- a/lib/with_advisory_lock/mysql.rb
+++ b/lib/with_advisory_lock/mysql.rb
@@ -5,7 +5,8 @@ class MySQL < Base
     # Caches nested lock support by MySQL reported version
     @@mysql_nl_cache       = {}
     @@mysql_nl_cache_mutex = Mutex.new
-    # See https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html#function_get-lock
+    # See https://dev.mysql.com/doc/refman/5.7/en/locking-functions.html
+    # See https://dev.mysql.com/doc/refman/8.0/en/locking-functions.html
     def try_lock
       raise ArgumentError, 'shared locks are not supported on MySQL' if shared
       raise ArgumentError, 'transaction level locks are not supported on MySQL' if transaction
@@ -18,8 +19,8 @@ def release_lock
     end
 
     def execute_successful?(mysql_function)
-      sql = "SELECT #{mysql_function} AS #{unique_column_name}"
-      connection.select_value(sql).to_i.positive?
+      sql = "SELECT #{mysql_function}"
+      connection.query_value(sql) == 1
     end
 
     # MySQL wants a string as the lock key.
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 3b4065f..f241feb 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -18,7 +18,6 @@
 ActiveRecord::Base.configurations = {
   default_env: {
     url: ENV.fetch('DATABASE_URL', "sqlite3://#{Dir.tmpdir}/with_advisory_lock_test#{RUBY_VERSION}-#{ActiveRecord.gem_version}.sqlite3"),
-    pool: 11,
     properties: { allowPublicKeyRetrieval: true } # for JRuby madness
   }
 }