diff --git a/src/Tokenizer/Tokens.php b/src/Tokenizer/Tokens.php
index 15044fef033..edb321167f5 100644
--- a/src/Tokenizer/Tokens.php
+++ b/src/Tokenizer/Tokens.php
@@ -1088,17 +1088,19 @@ public function clearRange(int $indexStart, int $indexEnd): void
      */
     public function isMonolithicPhp(): bool
     {
-        $size = $this->count();
-
-        if (0 === $size) {
+        if (0 === $this->count()) {
             return false;
         }
 
-        if ($this->isTokenKindFound(T_INLINE_HTML)) {
+        if ($this->countTokenKind(T_INLINE_HTML) > 1) {
             return false;
         }
 
-        return 1 >= ($this->countTokenKind(T_OPEN_TAG) + $this->countTokenKind(T_OPEN_TAG_WITH_ECHO));
+        if (1 === $this->countTokenKind(T_INLINE_HTML)) {
+            return 1 === Preg::match('/^#!.+$/', $this[0]->getContent());
+        }
+
+        return 1 === ($this->countTokenKind(T_OPEN_TAG) + $this->countTokenKind(T_OPEN_TAG_WITH_ECHO));
     }
 
     /**
diff --git a/tests/Tokenizer/TokensTest.php b/tests/Tokenizer/TokensTest.php
index 458c448ac98..202a9220b00 100644
--- a/tests/Tokenizer/TokensTest.php
+++ b/tests/Tokenizer/TokensTest.php
@@ -353,12 +353,26 @@ public function provideMonolithicPhpDetectionCases(): iterable
     {
         yield [true, "<?php\n"];
         yield [true, "<?php\n?>"];
+        yield [false, "#!\n<?php\n"];
+        yield [false, "#!/usr/bin/bash\ncat <?php\n"];
+        yield [false, "#!/usr/bin/env bash\ncat <?php\n"];
+        yield [true, "#!/usr/bin/php\n<?php\n"];
+        yield [true, "#!/usr/bin/php7.4-cli\n<?php\n"];
+        yield [false, "#!/usr/bin/php\n\n<?php\n"]; // empty line after shebang would be printed to console before PHP executes
+        yield [true, "#!/usr/bin/php8\n<?php\n"];
+        yield [true, "#!/usr/bin/env php\n<?php\n"];
+        yield [true, "#!/usr/bin/env php7.4\n<?php\n"];
+        yield [true, "#!/usr/bin/env php7.4-cli\n<?php\n"];
+        yield [false, "#!/usr/bin/env this-is\ntoo-much\n<?php\n"];
+        yield [false, "#!/usr/bin/php\nFoo bar<?php\n"];
+        yield [false, "#!/usr/bin/env php -n \nFoo bar\n<?php\n"];
         yield [false, ''];
         yield [false, ' '];
-        yield [false, "#!/usr/bin/env php\n<?php\n"];
         yield [false, " <?php\n"];
         yield [false, "<?php\n?> "];
         yield [false, "<?php\n?><?php\n"];
+        yield [false, 'Hello<?php echo "World!"; ?>'];
+        yield [false, '<?php echo "Hello"; ?> World!'];
         // short open tag
         yield [(bool) ini_get('short_open_tag'), "<?\n"];
         yield [(bool) ini_get('short_open_tag'), "<?\n?>"];