diff --git a/clickhouse-jdbc/src/test/java/ru/yandex/clickhouse/util/UtilsTest.java b/clickhouse-jdbc/src/test/java/ru/yandex/clickhouse/util/UtilsTest.java
index 6f76c7a25..a6329130f 100644
--- a/clickhouse-jdbc/src/test/java/ru/yandex/clickhouse/util/UtilsTest.java
+++ b/clickhouse-jdbc/src/test/java/ru/yandex/clickhouse/util/UtilsTest.java
@@ -39,7 +39,7 @@ public void testVarInt() {
             buffer = ByteBuffer.allocate(8);
             Utils.writeVarInt(i, buffer);
             Utils.writeVarInt(0 - i, buffer);
-            buffer = (ByteBuffer) ((Buffer) buffer.flip());
+            buffer = (ByteBuffer) ((Buffer) buffer).flip();
             assertEquals(Utils.readVarInt(buffer), i);
             assertEquals(Utils.readVarInt(buffer), 0 - i);
         }