diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index bd9440fca7..166d689da0 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -19,6 +19,7 @@ Yii Framework 2 Change Log
 - Enh #17993: Added `yii\i18n\Formatter::$currencyDecimalSeparator` to allow setting custom symbols for currency decimal in IntlNumberFormatter (XPOHOC269)
 - Bug #18000: PK value of Oracle ActiveRecord is missing after save (mankwok)
 - Enh #18006: Allow SameSite cookie pre PHP 7.3 (scottix)
+- Bug #18010: Allow upper or lower case operators in `InCondition` and `LikeCondition` (alex-code)
 
 
 2.0.34 March 26, 2020
diff --git a/framework/db/conditions/InConditionBuilder.php b/framework/db/conditions/InConditionBuilder.php
index 684ec0db73..f685216c11 100644
--- a/framework/db/conditions/InConditionBuilder.php
+++ b/framework/db/conditions/InConditionBuilder.php
@@ -33,7 +33,7 @@ class InConditionBuilder implements ExpressionBuilderInterface
      */
     public function build(ExpressionInterface $expression, array &$params = [])
     {
-        $operator = $expression->getOperator();
+        $operator = strtoupper($expression->getOperator());
         $column = $expression->getColumn();
         $values = $expression->getValues();
 
diff --git a/framework/db/conditions/LikeConditionBuilder.php b/framework/db/conditions/LikeConditionBuilder.php
index 62c3751705..8071efd639 100644
--- a/framework/db/conditions/LikeConditionBuilder.php
+++ b/framework/db/conditions/LikeConditionBuilder.php
@@ -48,7 +48,7 @@ class LikeConditionBuilder implements ExpressionBuilderInterface
      */
     public function build(ExpressionInterface $expression, array &$params = [])
     {
-        $operator = $expression->getOperator();
+        $operator = strtoupper($expression->getOperator());
         $column = $expression->getColumn();
         $values = $expression->getValue();
         $escape = $expression->getEscapingReplacements();
diff --git a/tests/framework/db/QueryBuilderTest.php b/tests/framework/db/QueryBuilderTest.php
index f308b8048b..f578388de3 100644
--- a/tests/framework/db/QueryBuilderTest.php
+++ b/tests/framework/db/QueryBuilderTest.php
@@ -9,6 +9,8 @@ namespace yiiunit\framework\db;
 
 use yii\db\ColumnSchemaBuilder;
 use yii\db\conditions\BetweenColumnsCondition;
+use yii\db\conditions\LikeCondition;
+use yii\db\conditions\InCondition;
 use yii\db\cubrid\QueryBuilder as CubridQueryBuilder;
 use yii\db\Expression;
 use yii\db\mssql\QueryBuilder as MssqlQueryBuilder;
@@ -1198,6 +1200,15 @@ abstract class QueryBuilderTest extends DatabaseTestCase
                 '([[id]], [[name]]) IN ((:qp0, :qp1), (:qp2, :qp3))',
                 [':qp0' => 1, ':qp1' => 'oy', ':qp2' => 2, ':qp3' => 'yo'],
             ],
+            
+            // in object conditions
+            [new InCondition('id', 'in', 1), '[[id]]=:qp0', [':qp0' => 1]],
+            [new InCondition('id', 'in', [1]), '[[id]]=:qp0', [':qp0' => 1]],
+            [new InCondition('id', 'not in', 1), '[[id]]<>:qp0', [':qp0' => 1]],
+            [new InCondition('id', 'not in', [1]), '[[id]]<>:qp0', [':qp0' => 1]],
+            [new InCondition('id', 'in', [1, 2]), '[[id]] IN (:qp0, :qp1)', [':qp0' => 1, ':qp1' => 2]],
+            [new InCondition('id', 'not in', [1, 2]), '[[id]] NOT IN (:qp0, :qp1)', [':qp0' => 1, ':qp1' => 2]],
+            
             // exists
             [['exists', (new Query())->select('id')->from('users')->where(['active' => 1])], 'EXISTS (SELECT [[id]] FROM [[users]] WHERE [[active]]=:qp0)', [':qp0' => 1]],
             [['not exists', (new Query())->select('id')->from('users')->where(['active' => 1])], 'NOT EXISTS (SELECT [[id]] FROM [[users]] WHERE [[active]]=:qp0)', [':qp0' => 1]],
@@ -2469,6 +2480,16 @@ abstract class QueryBuilderTest extends DatabaseTestCase
                 '[[location]].[[title_ru]] LIKE :qp0',
                 [':qp0' => 'vi%'],
             ],
+            
+            // like object conditions
+            [new LikeCondition('name', 'like', new Expression('CONCAT("test", name, "%")')), '[[name]] LIKE CONCAT("test", name, "%")', []],
+            [new LikeCondition('name', 'not like', new Expression('CONCAT("test", name, "%")')), '[[name]] NOT LIKE CONCAT("test", name, "%")', []],
+            [new LikeCondition('name', 'or like', new Expression('CONCAT("test", name, "%")')), '[[name]] LIKE CONCAT("test", name, "%")', []],
+            [new LikeCondition('name', 'or not like', new Expression('CONCAT("test", name, "%")')), '[[name]] NOT LIKE CONCAT("test", name, "%")', []],
+            [new LikeCondition('name', 'like', [new Expression('CONCAT("test", name, "%")'), '\ab_c']), '[[name]] LIKE CONCAT("test", name, "%") AND [[name]] LIKE :qp0', [':qp0' => '%\\\ab\_c%']],
+            [new LikeCondition('name', 'not like', [new Expression('CONCAT("test", name, "%")'), '\ab_c']), '[[name]] NOT LIKE CONCAT("test", name, "%") AND [[name]] NOT LIKE :qp0', [':qp0' => '%\\\ab\_c%']],
+            [new LikeCondition('name', 'or like', [new Expression('CONCAT("test", name, "%")'), '\ab_c']), '[[name]] LIKE CONCAT("test", name, "%") OR [[name]] LIKE :qp0', [':qp0' => '%\\\ab\_c%']],
+            [new LikeCondition('name', 'or not like', [new Expression('CONCAT("test", name, "%")'), '\ab_c']), '[[name]] NOT LIKE CONCAT("test", name, "%") OR [[name]] NOT LIKE :qp0', [':qp0' => '%\\\ab\_c%']],
         ];
 
         // adjust dbms specific escaping