diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 7dc97ae..bc128a7 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -13,6 +13,7 @@ jobs:
           - '8.2'
           - '8.3'
           - '8.4'
+          - '8.5'
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/src/Transformation/Expression/ExpressionUtils.php b/src/Transformation/Expression/ExpressionUtils.php
index 8f24d47..e68be86 100644
--- a/src/Transformation/Expression/ExpressionUtils.php
+++ b/src/Transformation/Expression/ExpressionUtils.php
@@ -124,6 +124,6 @@ protected static function translateIf(array $source): mixed
      */
     protected static function isLiteral(string $expression): bool
     {
-        return (boolean)preg_match('/^!.+!$/', $expression);
+        return (bool)preg_match('/^!.+!$/', $expression);
     }
 }
diff --git a/src/Transformation/Variable/Variable.php b/src/Transformation/Variable/Variable.php
index ebc52c6..6e55648 100644
--- a/src/Transformation/Variable/Variable.php
+++ b/src/Transformation/Variable/Variable.php
@@ -169,7 +169,7 @@ public function getVariableName(): string
      */
     public static function isVariable(string $candidate): bool
     {
-        return (boolean)preg_match('/^\$[a-zA-Z]\w*$/', $candidate);
+        return (bool)preg_match('/^\$[a-zA-Z]\w*$/', $candidate);
     }
 
     /**