diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b3ce5ca08..8b73a18b9 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       max-parallel: 6
       matrix:
-        phpVersions: ['7.1', '7.2', '7.3']
+        phpVersions: ['7.1', '7.2', '7.3', '7.4']
       fail-fast: false
     name: PHP ${{ matrix.phpVersions }}
     steps:
diff --git a/modules/system/classes/CombineAssets.php b/modules/system/classes/CombineAssets.php
index bc5d1d6de..87a9d1d8f 100644
--- a/modules/system/classes/CombineAssets.php
+++ b/modules/system/classes/CombineAssets.php
@@ -428,7 +428,7 @@ class CombineAssets
         $filesSalt = null;
         foreach ($assets as $asset) {
             $filters = $this->getFilters(File::extension($asset)) ?: [];
-            $path = file_exists($asset) ? $asset : File::symbolizePath($asset, null) ?: $this->localPath . $asset;
+            $path = file_exists($asset) ? $asset : (File::symbolizePath($asset, null) ?: $this->localPath . $asset);
             $files[] = new FileAsset($path, $filters, public_path());
             $filesSalt .= $this->localPath . $asset;
         }
@@ -482,7 +482,7 @@ class CombineAssets
         $key = '';
 
         $assetFiles = array_map(function ($file) {
-            return file_exists($file) ? $file : File::symbolizePath($file, null) ?: $this->localPath . $file;
+            return file_exists($file) ? $file : (File::symbolizePath($file, null) ?: $this->localPath . $file);
         }, $assets);
 
         foreach ($assetFiles as $file) {