diff --git a/composer.json b/composer.json
index 26a4ff2..99cff7b 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     "ext-pdo": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "5.7.*|7.4.*"
+    "phpunit/phpunit": "5.7.*|7.4.*|^9.5"
   },
   "autoload": {
     "psr-4": {
diff --git a/docker-compose.yml b/docker-compose.yml
index 3ef479a..99a1984 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -30,7 +30,8 @@ services:
 
   mysql:
     container_name: anydataset_db_mysql
-    image: mysql:5.7
+    image: mysql:8
+    command: --default-authentication-plugin=mysql_native_password
     environment:
       - MYSQL_ROOT_PASSWORD=password
     ports:
diff --git a/src/Database/DblibDatabase.php b/src/Database/DblibDatabase.php
index ff03b7c..d782fa3 100644
--- a/src/Database/DblibDatabase.php
+++ b/src/Database/DblibDatabase.php
@@ -57,7 +57,7 @@ protected function createTableIfNotExists($database, $createTable)
     public function createVersion()
     {
         $database = preg_replace('~^/~', '', $this->getDbDriver()->getUri()->getPath());
-        $createTable = 'CREATE TABLE ' . $this->getMigrationTable() . ' (version int, status varchar(20))';
+        $createTable = 'CREATE TABLE ' . $this->getMigrationTable() . ' (version int, status varchar(20), PRIMARY KEY (version))';
         $this->createTableIfNotExists($database, $createTable);
         $this->checkExistsVersion();
     }
diff --git a/src/Database/MySqlDatabase.php b/src/Database/MySqlDatabase.php
index 1de031d..297e693 100644
--- a/src/Database/MySqlDatabase.php
+++ b/src/Database/MySqlDatabase.php
@@ -40,7 +40,7 @@ public function dropDatabase()
      */
     public function createVersion()
     {
-        $this->getDbDriver()->execute('CREATE TABLE IF NOT EXISTS ' . $this->getMigrationTable() . ' (version int, status varchar(20))');
+        $this->getDbDriver()->execute('CREATE TABLE IF NOT EXISTS ' . $this->getMigrationTable() . ' (version int, status varchar(20), PRIMARY KEY (version))');
         $this->checkExistsVersion();
     }
 
diff --git a/src/Database/PgsqlDatabase.php b/src/Database/PgsqlDatabase.php
index 533e1ec..f1b18ef 100644
--- a/src/Database/PgsqlDatabase.php
+++ b/src/Database/PgsqlDatabase.php
@@ -60,7 +60,7 @@ public function dropDatabase()
      */
     public function createVersion()
     {
-        $this->getDbDriver()->execute('CREATE TABLE IF NOT EXISTS ' . $this->getMigrationTable() . ' (version int, status varchar(20))');
+        $this->getDbDriver()->execute('CREATE TABLE IF NOT EXISTS ' . $this->getMigrationTable() . ' (version int, status varchar(20), PRIMARY KEY (version))');
         $this->checkExistsVersion();
     }
 
diff --git a/src/Database/SqliteDatabase.php b/src/Database/SqliteDatabase.php
index 55423e1..189f00e 100644
--- a/src/Database/SqliteDatabase.php
+++ b/src/Database/SqliteDatabase.php
@@ -41,7 +41,7 @@ public function dropDatabase()
      */
     public function createVersion()
     {
-        $this->getDbDriver()->execute('CREATE TABLE IF NOT EXISTS ' . $this->getMigrationTable() . ' (version int, status varchar(20))');
+        $this->getDbDriver()->execute('CREATE TABLE IF NOT EXISTS ' . $this->getMigrationTable() . ' (version int, status varchar(20), PRIMARY KEY (version))');
         $this->checkExistsVersion();
     }
 
diff --git a/src/Migration.php b/src/Migration.php
index fcc8e41..536867f 100644
--- a/src/Migration.php
+++ b/src/Migration.php
@@ -184,7 +184,7 @@ public function getFileContent($file)
             "checksum" => null,
             "content" => null,
         ];
-        if (!file_exists($file)) {
+        if (empty($file) || !file_exists($file)) {
             return $data;
         }