diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ac78fe14c..19b678ea3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -112,7 +112,7 @@ jobs:
         run: composer install --no-progress --prefer-dist --optimize-autoloader
 
       - name: Code style with PHP-CS-Fixer
-        run: ./vendor/bin/php-cs-fixer fix --format=checkstyle | cs2pr
+        run: ./vendor/bin/php-cs-fixer fix --format=checkstyle --diff --dry-run | cs2pr
 
   phpcs:
     runs-on: ubuntu-latest
diff --git a/src/PhpSpreadsheet/CellReferenceHelper.php b/src/PhpSpreadsheet/CellReferenceHelper.php
index b2f18f6dd..5dc9aa8e0 100644
--- a/src/PhpSpreadsheet/CellReferenceHelper.php
+++ b/src/PhpSpreadsheet/CellReferenceHelper.php
@@ -24,7 +24,7 @@ class CellReferenceHelper
         $this->numberOfRows = $numberOfRows;
 
         // Get coordinate of $beforeCellAddress
-        [$beforeColumn, $beforeRow] = Coordinate::coordinateFromString($beforeCellAddress);
+        [$beforeColumn, $beforeRow] = \PhpOffice\PhpSpreadsheet\Cell\Coordinate::coordinateFromString($beforeCellAddress);
         $this->beforeColumn = Coordinate::columnIndexFromString($beforeColumn);
         $this->beforeRow = (int) $beforeRow;
     }