diff --git a/Lab4/Lab4.pdf b/Lab4/Lab4.pdf
index 0b1b4e4..2527c83 100644
Binary files a/Lab4/Lab4.pdf and b/Lab4/Lab4.pdf differ
diff --git a/Lab4/Test3.java b/Lab4/Test3.java
index fb068e0..08e8380 100644
--- a/Lab4/Test3.java
+++ b/Lab4/Test3.java
@@ -32,8 +32,11 @@ class Test3 {
     we.expect("new Improbable<String>().invoke(null)",
               new Improbable<String>().invoke(null).toString(),
               "<>");
+    we.expect("new Improbable<Integer>().invoke(1).transform(new Incr())",
+              new Improbable<Integer>().invoke(1).transform(new Incr()).toString(),
+              "<2>");
     we.expect("new Improbable<>().invoke(new Improbable<>().invoke(1))",
               new Improbable<>().invoke(new Improbable<Integer>().invoke(1)).toString(),
               "<<1>>");
   }
-}
+}
\ No newline at end of file