diff --git a/CHANGELOG.md b/CHANGELOG.md
index 567d1be..6fa2860 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -61,6 +61,7 @@
 - New #200: Add matching mode parameter to `Like` filter (@samdark, @vjik)
 - New #232: Add `All` and `None` filters (@vjik)
 - Chg #233: Remove nullable types from `withFilter()` and `getFilter()` methods of `FilterableDataInterface` (@vjik)
+- Bug #234: Fix handling of `null` values in `IterableDataReader` (@vjik)
 
 ## 1.0.1 January 25, 2023
 
diff --git a/src/Reader/Iterable/FilterHandler/BetweenHandler.php b/src/Reader/Iterable/FilterHandler/BetweenHandler.php
index ec4721e..a83cadc 100644
--- a/src/Reader/Iterable/FilterHandler/BetweenHandler.php
+++ b/src/Reader/Iterable/FilterHandler/BetweenHandler.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Data\Reader\Iterable\FilterHandler;
 
-use DateTimeInterface;
 use Yiisoft\Data\Reader\Filter\Between;
 use Yiisoft\Data\Reader\FilterInterface;
 use Yiisoft\Data\Reader\Iterable\Context;
@@ -29,13 +28,6 @@ public function match(object|array $item, FilterInterface $filter, Context $cont
         $min = $filter->minValue;
         $max = $filter->maxValue;
 
-        if (!$value instanceof DateTimeInterface) {
-            return $value >= $min && $value <= $max;
-        }
-
-        return $min instanceof DateTimeInterface
-            && $max instanceof DateTimeInterface
-            && $value->getTimestamp() >= $min->getTimestamp()
-            && $value->getTimestamp() <= $max->getTimestamp();
+        return $value >= $min && $value <= $max;
     }
 }
diff --git a/src/Reader/Iterable/FilterHandler/EqualsHandler.php b/src/Reader/Iterable/FilterHandler/EqualsHandler.php
index bc6539c..0e4b6cf 100644
--- a/src/Reader/Iterable/FilterHandler/EqualsHandler.php
+++ b/src/Reader/Iterable/FilterHandler/EqualsHandler.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Data\Reader\Iterable\FilterHandler;
 
-use DateTimeInterface;
 use Yiisoft\Data\Reader\Filter\Equals;
 use Yiisoft\Data\Reader\FilterInterface;
 use Yiisoft\Data\Reader\Iterable\Context;
@@ -27,11 +26,6 @@ public function match(object|array $item, FilterInterface $filter, Context $cont
         $itemValue = $context->readValue($item, $filter->field);
         $argumentValue = $filter->value;
 
-        if (!$itemValue instanceof DateTimeInterface) {
-            return $itemValue == $argumentValue;
-        }
-
-        return $argumentValue instanceof DateTimeInterface
-            && $itemValue->getTimestamp() === $argumentValue->getTimestamp();
+        return $itemValue == $argumentValue;
     }
 }
diff --git a/src/Reader/Iterable/FilterHandler/GreaterThanHandler.php b/src/Reader/Iterable/FilterHandler/GreaterThanHandler.php
index 8032f4f..77d5342 100644
--- a/src/Reader/Iterable/FilterHandler/GreaterThanHandler.php
+++ b/src/Reader/Iterable/FilterHandler/GreaterThanHandler.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Data\Reader\Iterable\FilterHandler;
 
-use DateTimeInterface;
 use Yiisoft\Data\Reader\Filter\GreaterThan;
 use Yiisoft\Data\Reader\FilterInterface;
 use Yiisoft\Data\Reader\Iterable\Context;
@@ -27,11 +26,6 @@ public function match(object|array $item, FilterInterface $filter, Context $cont
         $itemValue = $context->readValue($item, $filter->field);
         $argumentValue = $filter->value;
 
-        if (!$itemValue instanceof DateTimeInterface) {
-            return $itemValue > $argumentValue;
-        }
-
-        return $argumentValue instanceof DateTimeInterface
-            && $itemValue->getTimestamp() > $argumentValue->getTimestamp();
+        return $itemValue > $argumentValue;
     }
 }
diff --git a/src/Reader/Iterable/FilterHandler/GreaterThanOrEqualHandler.php b/src/Reader/Iterable/FilterHandler/GreaterThanOrEqualHandler.php
index 8065cce..ea61ee3 100644
--- a/src/Reader/Iterable/FilterHandler/GreaterThanOrEqualHandler.php
+++ b/src/Reader/Iterable/FilterHandler/GreaterThanOrEqualHandler.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Data\Reader\Iterable\FilterHandler;
 
-use DateTimeInterface;
 use Yiisoft\Data\Reader\Filter\GreaterThanOrEqual;
 use Yiisoft\Data\Reader\FilterInterface;
 use Yiisoft\Data\Reader\Iterable\Context;
@@ -28,11 +27,6 @@ public function match(object|array $item, FilterInterface $filter, Context $cont
         $itemValue = $context->readValue($item, $filter->field);
         $argumentValue = $filter->value;
 
-        if (!$itemValue instanceof DateTimeInterface) {
-            return $itemValue >= $argumentValue;
-        }
-
-        return $argumentValue instanceof DateTimeInterface
-            && $itemValue->getTimestamp() >= $argumentValue->getTimestamp();
+        return $itemValue >= $argumentValue;
     }
 }
diff --git a/src/Reader/Iterable/FilterHandler/LessThanHandler.php b/src/Reader/Iterable/FilterHandler/LessThanHandler.php
index 4ef0f34..beb8207 100644
--- a/src/Reader/Iterable/FilterHandler/LessThanHandler.php
+++ b/src/Reader/Iterable/FilterHandler/LessThanHandler.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Data\Reader\Iterable\FilterHandler;
 
-use DateTimeInterface;
 use Yiisoft\Data\Reader\Filter\LessThan;
 use Yiisoft\Data\Reader\FilterInterface;
 use Yiisoft\Data\Reader\Iterable\Context;
@@ -27,11 +26,10 @@ public function match(object|array $item, FilterInterface $filter, Context $cont
         $itemValue = $context->readValue($item, $filter->field);
         $argumentValue = $filter->value;
 
-        if (!$itemValue instanceof DateTimeInterface) {
-            return $itemValue < $argumentValue;
+        if ($itemValue === null) {
+            return false;
         }
 
-        return $argumentValue instanceof DateTimeInterface
-            && $itemValue->getTimestamp() < $argumentValue->getTimestamp();
+        return $itemValue < $argumentValue;
     }
 }
diff --git a/src/Reader/Iterable/FilterHandler/LessThanOrEqualHandler.php b/src/Reader/Iterable/FilterHandler/LessThanOrEqualHandler.php
index f6c0120..1a16734 100644
--- a/src/Reader/Iterable/FilterHandler/LessThanOrEqualHandler.php
+++ b/src/Reader/Iterable/FilterHandler/LessThanOrEqualHandler.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Data\Reader\Iterable\FilterHandler;
 
-use DateTimeInterface;
 use Yiisoft\Data\Reader\Filter\LessThanOrEqual;
 use Yiisoft\Data\Reader\FilterInterface;
 use Yiisoft\Data\Reader\Iterable\Context;
@@ -28,11 +27,10 @@ public function match(object|array $item, FilterInterface $filter, Context $cont
         $itemValue = $context->readValue($item, $filter->field);
         $argumentValue = $filter->value;
 
-        if (!$itemValue instanceof DateTimeInterface) {
-            return $itemValue <= $argumentValue;
+        if ($itemValue === null) {
+            return false;
         }
 
-        return $argumentValue instanceof DateTimeInterface
-            && $itemValue->getTimestamp() <= $argumentValue->getTimestamp();
+        return $itemValue <= $argumentValue;
     }
 }
diff --git a/tests/Common/FixtureTrait.php b/tests/Common/FixtureTrait.php
index 5764500..0f4f954 100644
--- a/tests/Common/FixtureTrait.php
+++ b/tests/Common/FixtureTrait.php
@@ -4,16 +4,10 @@
 
 namespace Yiisoft\Data\Tests\Common;
 
+use DateTimeImmutable;
+
 trait FixtureTrait
 {
-    protected static $fixtures = [
-        ['number' => 1, 'email' => 'foo@bar\\baz', 'balance' => 10.25, 'born_at' => null],
-        ['number' => 2, 'email' => 'bar@foo', 'balance' => 1.0, 'born_at' => null],
-        ['number' => 3, 'email' => 'seed@beat', 'balance' => 100.0, 'born_at' => null],
-        ['number' => 4, 'email' => 'the@best', 'balance' => 500.0, 'born_at' => null],
-        ['number' => 5, 'email' => 'test@test', 'balance' => 42.0, 'born_at' => '1990-01-01'],
-    ];
-
     protected function assertFixtures(array $expectedFixtureIndexes, array $actualFixtures): void
     {
         $expectedFixtures = [];
@@ -21,11 +15,22 @@ protected function assertFixtures(array $expectedFixtureIndexes, array $actualFi
             $expectedFixtures[$index] = $this->getFixture($index);
         }
 
-        $this->assertSame($expectedFixtures, $actualFixtures);
+        $this->assertEquals($expectedFixtures, $actualFixtures);
     }
 
     protected function getFixture(int $index): array
     {
-        return self::$fixtures[$index];
+        return $this->getFixtures()[$index];
+    }
+
+    protected function getFixtures(): array
+    {
+        return [
+            ['number' => 1, 'email' => 'foo@bar\\baz', 'balance' => 10.25, 'born_at' => null],
+            ['number' => 2, 'email' => 'bar@foo', 'balance' => 1.0, 'born_at' => null],
+            ['number' => 3, 'email' => 'seed@beat', 'balance' => 100.0, 'born_at' => null],
+            ['number' => 4, 'email' => 'the@best', 'balance' => 500.0, 'born_at' => null],
+            ['number' => 5, 'email' => 'test@test', 'balance' => 42.0, 'born_at' => new DateTimeImmutable('1990-01-01')],
+        ];
     }
 }
diff --git a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithBetweenTestCase.php b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithBetweenTestCase.php
index 22f286d..1d50992 100644
--- a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithBetweenTestCase.php
+++ b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithBetweenTestCase.php
@@ -4,14 +4,30 @@
 
 namespace Yiisoft\Data\Tests\Common\Reader\ReaderWithFilter;
 
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\DataProvider;
 use Yiisoft\Data\Reader\Filter\Between;
 use Yiisoft\Data\Tests\Common\Reader\BaseReaderTestCase;
 
 abstract class BaseReaderWithBetweenTestCase extends BaseReaderTestCase
 {
-    public function testWithReader(): void
+    public static function dataWithReader(): iterable
     {
-        $reader = $this->getReader()->withFilter(new Between('balance', 10.25, 100.0));
-        $this->assertFixtures([0, 2, 4], $reader->read());
+        yield 'float' => [new Between('balance', 10.25, 100.0), [1, 3, 5]];
+        yield 'datetime' => [new Between('born_at', new DateTimeImmutable('1989-01-01'), new DateTimeImmutable('1991-01-01')), [5]];
+        yield 'datetime 2' => [new Between('born_at', new DateTimeImmutable('1990-01-02'), new DateTimeImmutable('1990-01-03')), []];
+    }
+
+    #[DataProvider('dataWithReader')]
+    public function testWithReader(Between $filter, array $expectedFixtureNumbers): void
+    {
+        $expectedFixtureIndexes = array_map(
+            static fn(int $number): int => $number - 1,
+            $expectedFixtureNumbers,
+        );
+        $this->assertFixtures(
+            $expectedFixtureIndexes,
+            $this->getReader()->withFilter($filter)->read(),
+        );
     }
 }
diff --git a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithEqualsTestCase.php b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithEqualsTestCase.php
index f949781..75dc26c 100644
--- a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithEqualsTestCase.php
+++ b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithEqualsTestCase.php
@@ -4,14 +4,31 @@
 
 namespace Yiisoft\Data\Tests\Common\Reader\ReaderWithFilter;
 
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\DataProvider;
 use Yiisoft\Data\Reader\Filter\Equals;
 use Yiisoft\Data\Tests\Common\Reader\BaseReaderTestCase;
 
 abstract class BaseReaderWithEqualsTestCase extends BaseReaderTestCase
 {
-    public function testWithReader(): void
+    public static function dataWithReader(): iterable
     {
-        $reader = $this->getReader()->withFilter(new Equals('number', 2));
-        $this->assertFixtures([1], $reader->read());
+        yield 'integer' => [new Equals('number', 2), [2]];
+        yield 'float' => [new Equals('balance', 10.25), [1]];
+        yield 'string' => [new Equals('email', 'the@best'), [4]];
+        yield 'datetime' => [new Equals('born_at', new DateTimeImmutable('1990-01-01')), [5]];
+    }
+
+    #[DataProvider('dataWithReader')]
+    public function testWithReader(Equals $filter, array $expectedFixtureNumbers): void
+    {
+        $expectedFixtureIndexes = array_map(
+            static fn(int $number): int => $number - 1,
+            $expectedFixtureNumbers,
+        );
+        $this->assertFixtures(
+            $expectedFixtureIndexes,
+            $this->getReader()->withFilter($filter)->read(),
+        );
     }
 }
diff --git a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithGreaterThanOrEqualTestCase.php b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithGreaterThanOrEqualTestCase.php
index 298fa1d..1edca0f 100644
--- a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithGreaterThanOrEqualTestCase.php
+++ b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithGreaterThanOrEqualTestCase.php
@@ -4,14 +4,31 @@
 
 namespace Yiisoft\Data\Tests\Common\Reader\ReaderWithFilter;
 
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\DataProvider;
 use Yiisoft\Data\Reader\Filter\GreaterThanOrEqual;
 use Yiisoft\Data\Tests\Common\Reader\BaseReaderTestCase;
 
 abstract class BaseReaderWithGreaterThanOrEqualTestCase extends BaseReaderTestCase
 {
-    public function testWithReader(): void
+    public static function dataWithReader(): iterable
     {
-        $reader = $this->getReader()->withFilter(new GreaterThanOrEqual('balance', 500));
-        $this->assertFixtures([3], $reader->read());
+        yield 'integer' => [new GreaterThanOrEqual('number', 3), [3, 4, 5]];
+        yield 'float' => [new GreaterThanOrEqual('balance', 100.0), [3, 4]];
+        yield 'datetime' => [new GreaterThanOrEqual('born_at', new DateTimeImmutable('1990-01-01')), [5]];
+        yield 'datetime 2' => [new GreaterThanOrEqual('born_at', new DateTimeImmutable('1991-01-01')), []];
+    }
+
+    #[DataProvider('dataWithReader')]
+    public function testWithReader(GreaterThanOrEqual $filter, array $expectedFixtureNumbers): void
+    {
+        $expectedFixtureIndexes = array_map(
+            static fn(int $number): int => $number - 1,
+            $expectedFixtureNumbers,
+        );
+        $this->assertFixtures(
+            $expectedFixtureIndexes,
+            $this->getReader()->withFilter($filter)->read(),
+        );
     }
 }
diff --git a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithGreaterThanTestCase.php b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithGreaterThanTestCase.php
index 6bc7d3f..513d3b9 100644
--- a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithGreaterThanTestCase.php
+++ b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithGreaterThanTestCase.php
@@ -4,14 +4,31 @@
 
 namespace Yiisoft\Data\Tests\Common\Reader\ReaderWithFilter;
 
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\DataProvider;
 use Yiisoft\Data\Reader\Filter\GreaterThan;
 use Yiisoft\Data\Tests\Common\Reader\BaseReaderTestCase;
 
 abstract class BaseReaderWithGreaterThanTestCase extends BaseReaderTestCase
 {
-    public function testWithReader(): void
+    public static function dataWithReader(): iterable
     {
-        $reader = $this->getReader()->withFilter(new GreaterThan('balance', 499));
-        $this->assertFixtures([3], $reader->read());
+        yield 'integer' => [new GreaterThan('number', 3), [4, 5]];
+        yield 'float' => [new GreaterThan('balance', 50.0), [3, 4]];
+        yield 'datetime' => [new GreaterThan('born_at', new DateTimeImmutable('1989-01-01')), [5]];
+        yield 'datetime 2' => [new GreaterThan('born_at', new DateTimeImmutable('1990-01-01')), []];
+    }
+
+    #[DataProvider('dataWithReader')]
+    public function testWithReader(GreaterThan $filter, array $expectedFixtureNumbers): void
+    {
+        $expectedFixtureIndexes = array_map(
+            static fn(int $number): int => $number - 1,
+            $expectedFixtureNumbers,
+        );
+        $this->assertFixtures(
+            $expectedFixtureIndexes,
+            $this->getReader()->withFilter($filter)->read(),
+        );
     }
 }
diff --git a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithLessThanOrEqualTestCase.php b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithLessThanOrEqualTestCase.php
index e8b4ea3..adddc6c 100644
--- a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithLessThanOrEqualTestCase.php
+++ b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithLessThanOrEqualTestCase.php
@@ -4,14 +4,32 @@
 
 namespace Yiisoft\Data\Tests\Common\Reader\ReaderWithFilter;
 
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\DataProvider;
 use Yiisoft\Data\Reader\Filter\LessThanOrEqual;
 use Yiisoft\Data\Tests\Common\Reader\BaseReaderTestCase;
 
 abstract class BaseReaderWithLessThanOrEqualTestCase extends BaseReaderTestCase
 {
-    public function testWithReader(): void
+    public static function dataWithReader(): iterable
     {
-        $reader = $this->getReader()->withFilter(new LessThanOrEqual('balance', 1.0));
-        $this->assertFixtures([1], $reader->read());
+        yield 'integer' => [new LessThanOrEqual('number', 3), [1, 2, 3]];
+        yield 'float' => [new LessThanOrEqual('balance', 42.0), [1, 2, 5]];
+        yield 'datetime' => [new LessThanOrEqual('born_at', new DateTimeImmutable('1990-01-01')), [5]];
+        yield 'datetime 2' => [new LessThanOrEqual('born_at', new DateTimeImmutable('1990-01-02')), [5]];
+        yield 'datetime 3' => [new LessThanOrEqual('born_at', new DateTimeImmutable('1989-01-01')), []];
+    }
+
+    #[DataProvider('dataWithReader')]
+    public function testWithReader(LessThanOrEqual $filter, array $expectedFixtureNumbers): void
+    {
+        $expectedFixtureIndexes = array_map(
+            static fn(int $number): int => $number - 1,
+            $expectedFixtureNumbers,
+        );
+        $this->assertFixtures(
+            $expectedFixtureIndexes,
+            $this->getReader()->withFilter($filter)->read(),
+        );
     }
 }
diff --git a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithLessThanTestCase.php b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithLessThanTestCase.php
index a53e9e7..3203197 100644
--- a/tests/Common/Reader/ReaderWithFilter/BaseReaderWithLessThanTestCase.php
+++ b/tests/Common/Reader/ReaderWithFilter/BaseReaderWithLessThanTestCase.php
@@ -4,14 +4,31 @@
 
 namespace Yiisoft\Data\Tests\Common\Reader\ReaderWithFilter;
 
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\DataProvider;
 use Yiisoft\Data\Reader\Filter\LessThan;
 use Yiisoft\Data\Tests\Common\Reader\BaseReaderTestCase;
 
 abstract class BaseReaderWithLessThanTestCase extends BaseReaderTestCase
 {
-    public function testWithReader(): void
+    public static function dataWithReader(): iterable
     {
-        $reader = $this->getReader()->withFilter(new LessThan('balance', 1.1));
-        $this->assertFixtures([1], $reader->read());
+        yield 'integer' => [new LessThan('number', 3), [1, 2]];
+        yield 'float' => [new LessThan('balance', 50.0), [1, 2, 5]];
+        yield 'datetime' => [new LessThan('born_at', new DateTimeImmutable('1991-01-01')), [5]];
+        yield 'datetime 2' => [new LessThan('born_at', new DateTimeImmutable('1990-01-01')), []];
+    }
+
+    #[DataProvider('dataWithReader')]
+    public function testWithReader(LessThan $filter, array $expectedFixtureNumbers): void
+    {
+        $expectedFixtureIndexes = array_map(
+            static fn(int $number): int => $number - 1,
+            $expectedFixtureNumbers,
+        );
+        $this->assertFixtures(
+            $expectedFixtureIndexes,
+            $this->getReader()->withFilter($filter)->read(),
+        );
     }
 }
diff --git a/tests/Reader/Iterable/ReaderWithFilter/ReaderTrait.php b/tests/Reader/Iterable/ReaderWithFilter/ReaderTrait.php
index eba664f..0408dcc 100644
--- a/tests/Reader/Iterable/ReaderWithFilter/ReaderTrait.php
+++ b/tests/Reader/Iterable/ReaderWithFilter/ReaderTrait.php
@@ -11,6 +11,6 @@ trait ReaderTrait
 {
     protected function getReader(): DataReaderInterface
     {
-        return new IterableDataReader(self::$fixtures);
+        return new IterableDataReader($this->getFixtures());
     }
 }