diff --git a/java_tools/configuration_definition/src/main/java/com/rusefi/test/BitParsingTest.java b/java_tools/configuration_definition/src/main/java/com/rusefi/test/BitParsingTest.java
index f73d66a86b..b4881f1c39 100644
--- a/java_tools/configuration_definition/src/main/java/com/rusefi/test/BitParsingTest.java
+++ b/java_tools/configuration_definition/src/main/java/com/rusefi/test/BitParsingTest.java
@@ -32,7 +32,7 @@ public class BitParsingTest {
         };
         state.readBufferedReader(reader, Arrays.asList(javaFieldsConsumer));
 
-        System.out.printf("start[" + sw.toString() + "]end");
+        System.out.printf("start[" + sw + "]end");
 
         assertTrue(sw.toString().contains("\"false\", \"true\""));
         assertTrue(sw.toString().contains("\"nada\", \"si\""));