diff --git a/src/Commands/DbDrop.php b/src/Commands/DbDrop.php
index 900dbab..c9c722e 100644
--- a/src/Commands/DbDrop.php
+++ b/src/Commands/DbDrop.php
@@ -63,7 +63,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $dbHost = $_ENV['DB_HOST'];
         $dbName = $_ENV['DB_NAME'];
-        $dbLogin = $_ENV['DB_USER'] ?: (string)$_ENV['DB_LOGIN'];
+        $dbLogin = $_ENV['DB_USER'] ?? (string)$_ENV['DB_LOGIN'];
         $dbPassword = $_ENV['DB_PASSWORD'];
 
         if (!$dbHost || !$dbName || !$dbLogin) {
diff --git a/src/Commands/DbExport.php b/src/Commands/DbExport.php
index 05888f5..51ee626 100644
--- a/src/Commands/DbExport.php
+++ b/src/Commands/DbExport.php
@@ -53,7 +53,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $dbHost = $_ENV['DB_HOST'];
         $dbName = $_ENV['DB_NAME'];
-        $dbLogin = $_ENV['DB_USER'] ?: (string)$_ENV['DB_LOGIN'];
+        $dbLogin = $_ENV['DB_USER'] ?? (string)$_ENV['DB_LOGIN'];
         $dbPassword = $_ENV['DB_PASSWORD'];
 
         if (!$dbHost || !$dbName || !$dbLogin) {
diff --git a/src/Commands/DbImport.php b/src/Commands/DbImport.php
index 1995fdd..c844b04 100644
--- a/src/Commands/DbImport.php
+++ b/src/Commands/DbImport.php
@@ -80,7 +80,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $dbHost = $_ENV['DB_HOST'];
         $dbName = $_ENV['DB_NAME'];
-        $dbLogin = $_ENV['DB_USER'] ?: (string)$_ENV['DB_LOGIN'];
+        $dbLogin = $_ENV['DB_USER'] ?? (string)$_ENV['DB_LOGIN'];
         $dbPassword = $_ENV['DB_PASSWORD'];
 
         if (!$dbHost || !$dbName || !$dbLogin) {