diff --git a/src/MySQLReplication/Config/Config.php b/src/MySQLReplication/Config/Config.php
index 916f434..a7ecea1 100644
--- a/src/MySQLReplication/Config/Config.php
+++ b/src/MySQLReplication/Config/Config.php
@@ -105,15 +105,23 @@ public function validate(): void
 
     public function checkDataBasesOnly(string $database): bool
     {
-        return ($this->databasesOnly !== [] && !in_array($database, $this->databasesOnly, true))
-            || ($this->databasesRegex !== [] && !self::matchNames($database, $this->databasesRegex));
+        if ($this->databasesOnly === [] && $this->databasesRegex === []) {
+            return false;
+        }
+
+        return !in_array($database, $this->databasesOnly, true)
+            && !self::matchNames($database, $this->databasesRegex);
     }
 
 
     public function checkTablesOnly(string $table): bool
     {
-        return ($this->tablesOnly !== [] && !in_array($table, $this->tablesOnly, true))
-            || ($this->tablesRegex !== [] && !self::matchNames($table, $this->tablesRegex));
+        if ($this->tablesOnly === [] && $this->tablesRegex === []) {
+            return false;
+        }
+
+        return !in_array($table, $this->tablesOnly, true)
+            && !self::matchNames($table, $this->tablesRegex);
     }
 
     public function checkEvent(int $type): bool
diff --git a/tests/Unit/Config/ConfigTest.php b/tests/Unit/Config/ConfigTest.php
index 6f3924f..1d5b9c2 100644
--- a/tests/Unit/Config/ConfigTest.php
+++ b/tests/Unit/Config/ConfigTest.php
@@ -102,6 +102,20 @@ public function testShouldCheckDataBasesOnly(): void
         self::assertFalse($config->checkDataBasesOnly('foo_123'));
     }
 
+    public function testShouldCheckDataBasesOnlyListAndRegex(): void
+    {
+        $config = (new ConfigBuilder())
+            ->withDatabasesOnly(['foo'])
+            ->withDatabasesRegex(['/^instance\d+$/'])
+            ->build();
+        self::assertFalse($config->checkDataBasesOnly('foo'));
+        self::assertFalse($config->checkDataBasesOnly('instance1'));
+        self::assertFalse($config->checkDataBasesOnly('instance123'));
+        self::assertTrue($config->checkDataBasesOnly('bar'));
+        self::assertTrue($config->checkDataBasesOnly('instance'));
+        self::assertTrue($config->checkDataBasesOnly('instanceX'));
+    }
+
     public function testShouldCheckTablesOnly(): void
     {
         $config = (new ConfigBuilder())->build();
@@ -120,6 +134,20 @@ public function testShouldCheckTablesOnly(): void
         self::assertFalse($config->checkTablesOnly('foo_123'));
     }
 
+    public function testShouldCheckTablesOnlyListAndRegex(): void
+    {
+        $config = (new ConfigBuilder())
+            ->withTablesOnly(['foo'])
+            ->withTablesRegex(['/^instance\d+$/'])
+            ->build();
+        self::assertFalse($config->checkTablesOnly('foo'));
+        self::assertFalse($config->checkTablesOnly('instance1'));
+        self::assertFalse($config->checkTablesOnly('instance123'));
+        self::assertTrue($config->checkTablesOnly('bar'));
+        self::assertTrue($config->checkTablesOnly('instance'));
+        self::assertTrue($config->checkTablesOnly('instanceX'));
+    }
+
     public function testShouldCheckEvent(): void
     {
         $config = (new ConfigBuilder())->build();