diff --git a/src/Tokenizers/PHP.php b/src/Tokenizers/PHP.php
index 192fbc3de9..3246f8654e 100644
--- a/src/Tokenizers/PHP.php
+++ b/src/Tokenizers/PHP.php
@@ -2217,6 +2217,8 @@ protected function tokenize($string)
             if ($tokenIsArray === true
                 && $token[0] === T_STRING
                 && strtolower($token[1]) === 'fn'
+                && isset(static::T_STRING_CONTEXTS[$finalTokens[$lastNotEmptyToken]['code']]) === false
+                && $finalTokens[$lastNotEmptyToken]['content'] !== '&'
             ) {
                 // Modify the original token stack so that
                 // future checks (like looking for T_NULLABLE) can
diff --git a/tests/Core/Tokenizers/Tokenizer/CreateTokenMapParenthesesTest.inc b/tests/Core/Tokenizers/Tokenizer/CreateTokenMapParenthesesTest.inc
index 9cdc341797..853e94cedc 100644
--- a/tests/Core/Tokenizers/Tokenizer/CreateTokenMapParenthesesTest.inc
+++ b/tests/Core/Tokenizers/Tokenizer/CreateTokenMapParenthesesTest.inc
@@ -60,8 +60,14 @@ function name($a, $b/* testFunctionParenthesesCloser */) {}
 function &returnByRef ($a, $b/* testFunctionParenthesesCloserReturnByRef */) {}
 
 class ReservedKeyword {
-    /* testFunctionParenthesesOwnerKeywordName */
-    public function match($a, $b/* testFunctionParenthesesCloserKeywordName */) {}
+    /* testFunctionParenthesesOwnerKeywordNameMatch */
+    public function match($a, $b/* testFunctionParenthesesCloserKeywordNameMatch */) {}
+
+    /* testFunctionParenthesesOwnerKeywordNameFn */
+    public function fn($a, $b/* testFunctionParenthesesCloserKeywordNameFn */) {}
+
+    /* testFunctionParenthesesOwnerKeywordNameFnReturnByRef */
+    public function &fn($a, $b/* testFunctionParenthesesCloserKeywordNameFnReturnByRef */) {}
 }
 
 /* testClosureParenthesesOwner */
diff --git a/tests/Core/Tokenizers/Tokenizer/CreateTokenMapParenthesesTest.php b/tests/Core/Tokenizers/Tokenizer/CreateTokenMapParenthesesTest.php
index 39c91fa879..f4068b5047 100644
--- a/tests/Core/Tokenizers/Tokenizer/CreateTokenMapParenthesesTest.php
+++ b/tests/Core/Tokenizers/Tokenizer/CreateTokenMapParenthesesTest.php
@@ -139,8 +139,16 @@ public static function dataParenthesesWithOwner()
                 'testMarker' => '/* testFunctionParenthesesOwnerReturnByRef */',
                 'tokenCode'  => T_FUNCTION,
             ],
-            'function declaration, keyword as function name' => [
-                'testMarker' => '/* testFunctionParenthesesOwnerKeywordName */',
+            'function declaration, "match" as function name' => [
+                'testMarker' => '/* testFunctionParenthesesOwnerKeywordNameMatch */',
+                'tokenCode'  => T_FUNCTION,
+            ],
+            'function declaration, "fn" as function name'    => [
+                'testMarker' => '/* testFunctionParenthesesOwnerKeywordNameFn */',
+                'tokenCode'  => T_FUNCTION,
+            ],
+            'function declaration, "&fn" as function name'   => [
+                'testMarker' => '/* testFunctionParenthesesOwnerKeywordNameFnReturnByRef */',
                 'tokenCode'  => T_FUNCTION,
             ],
             'closure declaration'                            => [
@@ -276,7 +284,7 @@ public static function dataParenthesesWithoutOwner()
 
 
     /**
-     * Test parentheses owner tokens when used without parentheses (where possible) do *not* the "parenthesis_*" token indexes set.
+     * Test parentheses owner tokens when used without parentheses (where possible) do *not* have the "parenthesis_*" token indexes set.
      *
      * @param string     $testMarker The comment prefacing the target token.
      * @param int|string $tokenCode  The token code to look for.