diff --git a/chapter4/bankService/SavingsAccountTest.java b/chapter4/bankService/SavingsAccountTest.java
index e16b4dc..b3ec345 100644
--- a/chapter4/bankService/SavingsAccountTest.java
+++ b/chapter4/bankService/SavingsAccountTest.java
@@ -56,3 +56,12 @@ private Object[][] createValidWithdrawData() {
      */
     @Test
     public void withdrawingAmountGreaterThanBalance_Throws_InsufficientFundsException() throws InsufficientFundsException {
+        try {
+            savings.withdraw(200.00);
+            fail("Expected Insufficient Funds Exception but none is thrown");
+        } catch (InsufficientFundsException e){
+            // Then
+            assertEquals(savings.getBalance(), 100.00);
+        }
+    }
+}