diff --git a/src/Preg.php b/src/Preg.php
index f238e11f3e4..6216e01e078 100644
--- a/src/Preg.php
+++ b/src/Preg.php
@@ -65,15 +65,11 @@ public static function matchAll(string $pattern, string $subject, ?array &$match
     }
 
     /**
-     * @param string|string[] $pattern
-     * @param string|string[] $replacement
      * @param string|string[] $subject
      *
      * @throws PregException
-     *
-     * @return string|string[]
      */
-    public static function replace($pattern, $replacement, $subject, int $limit = -1, ?int &$count = null)
+    public static function replace(string $pattern, string $replacement, $subject, int $limit = -1, ?int &$count = null): string
     {
         $result = @preg_replace(self::addUtf8Modifier($pattern), $replacement, $subject, $limit, $count);
         if (null !== $result && PREG_NO_ERROR === preg_last_error()) {
@@ -89,14 +85,9 @@ public static function replace($pattern, $replacement, $subject, int $limit = -1
     }
 
     /**
-     * @param string|string[] $pattern
-     * @param string|string[] $subject
-     *
      * @throws PregException
-     *
-     * @return string|string[]
      */
-    public static function replaceCallback($pattern, callable $callback, $subject, int $limit = -1, ?int &$count = null)
+    public static function replaceCallback(string $pattern, callable $callback, string $subject, int $limit = -1, ?int &$count = null): string
     {
         $result = @preg_replace_callback(self::addUtf8Modifier($pattern), $callback, $subject, $limit, $count);
         if (null !== $result && PREG_NO_ERROR === preg_last_error()) {
diff --git a/tests/PregTest.php b/tests/PregTest.php
index e78e18fe2db..3a96911ff13 100644
--- a/tests/PregTest.php
+++ b/tests/PregTest.php
@@ -125,7 +125,7 @@ public function testPatternsValidation(string $pattern, ?int $expected = null, ?
 
         try {
             $buffer = "The quick brown \xFF\x00\\xXX jumps over the lazy dog\n";
-            $actual = $buffer !== Preg::replace((array) $pattern, 'abc', $buffer);
+            $actual = $buffer !== Preg::replace($pattern, 'abc', $buffer);
         } catch (\Exception $ex) {
             $setup();
 
@@ -176,7 +176,6 @@ public function testReplaceFailing(): void
      * @param string|string[] $subject
      *
      * @dataProvider provideCommonCases
-     * @dataProvider provideArrayOfPatternsCases
      */
     public function testReplace($pattern, $subject): void
     {
@@ -199,7 +198,6 @@ public function testReplaceCallbackFailing(): void
      * @param string|string[] $subject
      *
      * @dataProvider provideCommonCases
-     * @dataProvider provideArrayOfPatternsCases
      */
     public function testReplaceCallback($pattern, $subject): void
     {
@@ -222,14 +220,6 @@ public function provideCommonCases(): array
         ];
     }
 
-    public function provideArrayOfPatternsCases(): array
-    {
-        return [
-            [['/à/', '/í/'], 'Tàíl'],
-            [['/'.\chr(174).'/', '/'.\chr(224).'/'], 'foo'],
-        ];
-    }
-
     public function testSplitFailing(): void
     {
         $this->expectException(PregException::class);