diff --git a/test/integration/Adapter/Driver/Pdo/Mysql/AdapterTest.php b/test/integration/Adapter/Driver/Pdo/Mysql/AdapterTest.php
index 133d7c64..91056569 100644
--- a/test/integration/Adapter/Driver/Pdo/Mysql/AdapterTest.php
+++ b/test/integration/Adapter/Driver/Pdo/Mysql/AdapterTest.php
@@ -2,11 +2,14 @@
 
 namespace LaminasIntegrationTest\Db\Adapter\Driver\Pdo\Mysql;
 
+use Laminas\Db\Adapter\Adapter;
 use LaminasIntegrationTest\Db\Adapter\Driver\Pdo\AbstractAdapterTest;
 
 class AdapterTest extends AbstractAdapterTest
 {
     use AdapterTrait;
 
+    /** @var Adapter */
+    protected $adapter;
     public const DB_SERVER_PORT = 3306;
 }
diff --git a/test/integration/Adapter/Driver/Pdo/Mysql/QueryTest.php b/test/integration/Adapter/Driver/Pdo/Mysql/QueryTest.php
index 43087a4c..6af423ec 100644
--- a/test/integration/Adapter/Driver/Pdo/Mysql/QueryTest.php
+++ b/test/integration/Adapter/Driver/Pdo/Mysql/QueryTest.php
@@ -2,6 +2,7 @@
 
 namespace LaminasIntegrationTest\Db\Adapter\Driver\Pdo\Mysql;
 
+use Laminas\Db\Adapter\Adapter;
 use Laminas\Db\Adapter\Driver\Pdo\Result as PdoResult;
 use Laminas\Db\Adapter\Exception\RuntimeException;
 use Laminas\Db\ResultSet\ResultSet;
@@ -12,6 +13,8 @@ class QueryTest extends TestCase
 {
     use AdapterTrait;
 
+    /** @var Adapter */
+    protected $adapter;
     /**
      * @psalm-return array<array-key, array{
      *     0: string,
diff --git a/test/integration/Adapter/Driver/Pdo/Mysql/TableGatewayTest.php b/test/integration/Adapter/Driver/Pdo/Mysql/TableGatewayTest.php
index 072f79a8..d79e8843 100644
--- a/test/integration/Adapter/Driver/Pdo/Mysql/TableGatewayTest.php
+++ b/test/integration/Adapter/Driver/Pdo/Mysql/TableGatewayTest.php
@@ -2,6 +2,7 @@
 
 namespace LaminasIntegrationTest\Db\Adapter\Driver\Pdo\Mysql;
 
+use Laminas\Db\Adapter\Adapter;
 use Laminas\Db\Sql\TableIdentifier;
 use Laminas\Db\TableGateway\Feature\MetadataFeature;
 use Laminas\Db\TableGateway\TableGateway;
@@ -13,6 +14,8 @@ class TableGatewayTest extends TestCase
 {
     use AdapterTrait;
 
+    /** @var Adapter */
+    protected $adapter;
     /**
      * @covers \Laminas\Db\TableGateway\TableGateway::__construct
      */
diff --git a/test/integration/Adapter/Driver/Pdo/Postgresql/AdapterTest.php b/test/integration/Adapter/Driver/Pdo/Postgresql/AdapterTest.php
index ec0f5f9e..d62942d9 100644
--- a/test/integration/Adapter/Driver/Pdo/Postgresql/AdapterTest.php
+++ b/test/integration/Adapter/Driver/Pdo/Postgresql/AdapterTest.php
@@ -2,11 +2,14 @@
 
 namespace LaminasIntegrationTest\Db\Adapter\Driver\Pdo\Postgresql;
 
+use Laminas\Db\Adapter\Adapter;
 use LaminasIntegrationTest\Db\Adapter\Driver\Pdo\AbstractAdapterTest;
 
 class AdapterTest extends AbstractAdapterTest
 {
     use AdapterTrait;
 
+    /** @var Adapter */
+    protected $adapter;
     public const DB_SERVER_PORT = 5432;
 }
diff --git a/test/unit/Adapter/Driver/IbmDb2/StatementTest.php b/test/unit/Adapter/Driver/IbmDb2/StatementTest.php
index e386d793..5aa71abb 100644
--- a/test/unit/Adapter/Driver/IbmDb2/StatementTest.php
+++ b/test/unit/Adapter/Driver/IbmDb2/StatementTest.php
@@ -16,6 +16,8 @@ class StatementTest extends TestCase
 {
     /** @var Statement */
     protected $statement;
+    /** @var int */
+    protected $currentErrorReporting;
 
     /**
      * Sets up the fixture, for example, opens a network connection.
diff --git a/test/unit/RowGateway/RowGatewayTest.php b/test/unit/RowGateway/RowGatewayTest.php
index 87229a81..795367a0 100644
--- a/test/unit/RowGateway/RowGatewayTest.php
+++ b/test/unit/RowGateway/RowGatewayTest.php
@@ -20,6 +20,8 @@ class RowGatewayTest extends TestCase
     /** @var RowGateway */
     protected $rowGateway;
 
+    /** @var ResultInterface&MockObject */
+    protected $mockResult;
     protected function setUp(): void
     {
         // mock the adapter, driver, and parts
diff --git a/test/unit/Sql/Platform/Mysql/SelectDecoratorTest.php b/test/unit/Sql/Platform/Mysql/SelectDecoratorTest.php
index b852f783..41c3aebc 100644
--- a/test/unit/Sql/Platform/Mysql/SelectDecoratorTest.php
+++ b/test/unit/Sql/Platform/Mysql/SelectDecoratorTest.php
@@ -15,10 +15,16 @@
 use Laminas\Db\Sql\Select;
 use Laminas\Db\Sql\Sql;
 use LaminasTest\Db\TestAsset\TrustingMysqlPlatform;
+use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
 
 class SelectDecoratorTest extends TestCase
 {
+    /** @var Adapter&MockObject */
+    protected $mockAdapter;
+
+    /** @var Sql */
+    protected $sql;
     /**
      * @testdox integration test: Testing SelectDecorator will use Select an internal state to prepare
      *                            a proper limit/offset sql statement
diff --git a/test/unit/TableGateway/AbstractTableGatewayTest.php b/test/unit/TableGateway/AbstractTableGatewayTest.php
index ab50b223..b5b04d0e 100644
--- a/test/unit/TableGateway/AbstractTableGatewayTest.php
+++ b/test/unit/TableGateway/AbstractTableGatewayTest.php
@@ -16,6 +16,7 @@
 use Laminas\Db\TableGateway\AbstractTableGateway;
 use Laminas\Db\TableGateway\Feature\FeatureSet;
 use PHPUnit\Framework\MockObject\Generator;
+use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
 use ReflectionClass;
 
@@ -30,6 +31,9 @@ class AbstractTableGatewayTest extends TestCase
     /** @var AbstractTableGateway */
     protected $table;
 
+    /** @var FeatureSet&MockObject */
+    protected $mockFeatureSet;
+
     /**
      * Sets up the fixture, for example, opens a network connection.
      * This method is called before a test is executed.