diff --git a/java-numbers-4/src/test/java/com/baeldung/number_0xff/Number0xffUnitTest.java b/java-numbers-4/src/test/java/com/baeldung/number_0xff/Number0xffUnitTest.java
index e9f80c57d5..64615ccee9 100644
--- a/java-numbers-4/src/test/java/com/baeldung/number_0xff/Number0xffUnitTest.java
+++ b/java-numbers-4/src/test/java/com/baeldung/number_0xff/Number0xffUnitTest.java
@@ -16,7 +16,7 @@ public class Number0xffUnitTest {
     public void test0xFFAssignedToByte() {
         byte y = (byte) 0xff;
         int expectedValue = -1;
-        assertEquals(x, expectedValue);
+        assertEquals(y, expectedValue);
     }
 
     @Test