diff --git a/.gitignore b/.gitignore
index 487a7d6..7c50415 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /vendor/
 /build/
 composer.lock
+.phpunit.result.cache
diff --git a/src/array_first_last.php b/src/array_first_last.php
index e547638..66e93b3 100644
--- a/src/array_first_last.php
+++ b/src/array_first_last.php
@@ -10,7 +10,7 @@
      *   empty. Note that null itself can also be a valid array value.
      */
     function array_first(array $array): mixed {
-        return empty($array) ? null : $array[array_key_first($array)];
+        return $array === [] ? null : $array[array_key_first($array)];
     }
 
     /**
@@ -21,7 +21,7 @@ function array_first(array $array): mixed {
      *   empty. Note that null itself can also be a valid array value.
      */
     function array_last(array $array): mixed {
-        return empty($array) ? null : $array[array_key_last($array)];
+        return $array === [] ? null : $array[array_key_last($array)];
     }
 }
 else {
@@ -33,7 +33,7 @@ function array_last(array $array): mixed {
      *   empty. Note that null itself can also be a valid array value.
      */
     function array_first(array $array) {
-        return empty($array) ? null : $array[array_key_first($array)];
+        return $array === [] ? null : $array[array_key_first($array)];
     }
 
     /**
@@ -44,6 +44,6 @@ function array_first(array $array) {
      *   empty. Note that null itself can also be a valid array value.
      */
     function array_last(array $array) {
-        return empty($array) ? null : $array[array_key_last($array)];
+        return $array === [] ? null : $array[array_key_last($array)];
     }
 }