diff --git a/src/AbstractCsvTest.php b/src/AbstractCsvTest.php
index 836dcb5a..c452e0b8 100644
--- a/src/AbstractCsvTest.php
+++ b/src/AbstractCsvTest.php
@@ -313,8 +313,9 @@ public function testFailedAddStreamFilterWithWrongFilter(): void
 
         /** @var resource $tmpfile */
         $tmpfile = tmpfile();
-        $csv = Writer::createFromStream($tmpfile);
-        $csv->addStreamFilter('foobar.toupper');
+
+        Writer::createFromStream($tmpfile)
+            ->addStreamFilter('foobar.toupper');
     }
 
     public function testStreamFilterDetection(): void
diff --git a/src/CharsetConverterTest.php b/src/CharsetConverterTest.php
index 61278821..4c99b06d 100644
--- a/src/CharsetConverterTest.php
+++ b/src/CharsetConverterTest.php
@@ -65,10 +65,7 @@ public function testCharsetConverterConvertsAnArray(): void
             ->outputEncoding('utf-8')
         ;
 
-        /** @var array $result */
-        $result = $converter->convert([$raw]);
-
-        self::assertSame($expected, $result[0]);
+        self::assertSame($expected, [...$converter->convert([$raw])][0]);
     }
 
     public function testCharsetConverterConvertsAnIterator(): void
@@ -125,10 +122,8 @@ public function testConvertOnlyStringField(array $record, array $expected): void
         $converter = (new CharsetConverter())
             ->inputEncoding('iso-8859-15')
             ->outputEncoding('utf-8');
-        /** @var array $res */
-        $res = $converter->convert([$record]);
 
-        self::assertSame($expected, $res[0]);
+        self::assertSame($expected, [...$converter->convert([$record])][0]);
     }
 
     public static function converterProvider(): array
diff --git a/src/MapIteratorTest.php b/src/MapIteratorTest.php
index 54425fc0..a211a0bc 100644
--- a/src/MapIteratorTest.php
+++ b/src/MapIteratorTest.php
@@ -17,7 +17,6 @@
 use PHPUnit\Framework\Attributes\Group;
 use PHPUnit\Framework\TestCase;
 use function array_map;
-use function iterator_to_array;
 
 #[Group('csv')]
 final class MapIteratorTest extends TestCase
@@ -43,9 +42,6 @@ public function testMapIteratorCanAccessTheIteratorKey(): void
         $iterator = new ArrayIterator(['foo' => 'bar', 'bar' => 'baz']);
         $mapper = fn (string $value, $offset): string =>  $offset.' => '.$value;
 
-        self::assertSame(
-            $expected,
-            iterator_to_array(new MapIterator($iterator, $mapper), true)
-        );
+        self::assertSame($expected, [...new MapIterator($iterator, $mapper)]);
     }
 }
diff --git a/src/ReaderTest.php b/src/ReaderTest.php
index 989b48a4..f006cb3d 100644
--- a/src/ReaderTest.php
+++ b/src/ReaderTest.php
@@ -23,7 +23,6 @@
 use function fclose;
 use function fopen;
 use function fputcsv;
-use function iterator_to_array;
 use function json_encode;
 use function unlink;
 
@@ -159,11 +158,10 @@ public function testHeaderThrowsExceptionOnError(): void
         );
         $csv->setHeaderOffset(0);
         self::assertSame(['field1', 'field1', 'field3'], $csv->getHeader());
-        try {
-            iterator_to_array($csv);
-        } catch (SyntaxError $exception) {
-            self::assertSame(['field1'], $exception->duplicateColumnNames());
-        }
+
+        $this->expectExceptionObject(SyntaxError::dueToDuplicateHeaderColumnNames(['field1']));
+
+        [...$csv];
     }
 
     public function testHeaderThrowsExceptionOnEmptyLine(): void