diff --git a/tests/Provider/QueryBuilderProvider.php b/tests/Provider/QueryBuilderProvider.php
index 4944e41..f557bf3 100644
--- a/tests/Provider/QueryBuilderProvider.php
+++ b/tests/Provider/QueryBuilderProvider.php
@@ -412,4 +412,22 @@ public static function prepareValue(): array
 
         return $values;
     }
+
+    public static function caseExpressionBuilder(): array
+    {
+        $data = parent::caseExpressionBuilder();
+
+        $data['with case expression'] = [
+            $data['with case expression'][0]->else(
+                new Expression('to_number(:qp0)', [':qp0' => $param = new Param(4, DataType::INTEGER)])
+            ),
+            'CASE (1 + 2) WHEN 1 THEN 1 WHEN 2 THEN 2 WHEN 3 THEN (2 + 1) ELSE to_number(:qp0) END',
+            [':qp0' => $param],
+            3,
+        ];
+        $data['without case expression'][1] = 'CASE WHEN "column_name" = :qp0 THEN :qp1'
+            . ' WHEN "column_name" = 2 THEN (SELECT :pv2 FROM DUAL) END';
+
+        return $data;
+    }
 }
diff --git a/tests/QueryBuilderTest.php b/tests/QueryBuilderTest.php
index 5baf7d4..238b6a0 100644
--- a/tests/QueryBuilderTest.php
+++ b/tests/QueryBuilderTest.php
@@ -9,6 +9,7 @@
 use Yiisoft\Db\Exception\Exception;
 use InvalidArgumentException;
 use Yiisoft\Db\Exception\NotSupportedException;
+use Yiisoft\Db\Expression\CaseExpression;
 use Yiisoft\Db\Expression\ExpressionInterface;
 use Yiisoft\Db\Oracle\Tests\Provider\QueryBuilderProvider;
 use Yiisoft\Db\Oracle\Tests\Support\TestTrait;
@@ -568,4 +569,14 @@ public function testDropTable(string $expected, ?bool $ifExists, ?bool $cascade)
 
         parent::testDropTable($expected, $ifExists, $cascade);
     }
+
+    #[DataProviderExternal(QueryBuilderProvider::class, 'caseExpressionBuilder')]
+    public function testCaseExpressionBuilder(
+        CaseExpression $case,
+        string $expectedSql,
+        array $expectedParams,
+        string|int $expectedResult,
+    ): void {
+        parent::testCaseExpressionBuilder($case, $expectedSql, $expectedParams, $expectedResult);
+    }
 }
diff --git a/tests/Support/TestTrait.php b/tests/Support/TestTrait.php
index 4715ef3..7e3ff72 100644
--- a/tests/Support/TestTrait.php
+++ b/tests/Support/TestTrait.php
@@ -61,7 +61,7 @@ protected function getDsn(): string
         return $this->dsn;
     }
 
-    protected function getDriverName(): string
+    protected static function getDriverName(): string
     {
         return 'oci';
     }