diff --git a/src/main/java/com/r3/developers/csdetemplate/MyFirstFlow.java b/src/main/java/com/r3/developers/csdetemplate/MyFirstFlow.java
index ffcc434..21321c6 100644
--- a/src/main/java/com/r3/developers/csdetemplate/MyFirstFlow.java
+++ b/src/main/java/com/r3/developers/csdetemplate/MyFirstFlow.java
@@ -46,7 +46,7 @@ public class MyFirstFlow implements RPCStartableFlow {
     @NotNull
     @Suspendable
     @Override
-    public String call(@NotNull RPCRequestData requestBody) {
+    public String call(RPCRequestData requestBody) {
 
         // Useful logging to follow what's happening in the console or logs
         log.info("MFF: MyFirstFlow.call() called");
diff --git a/src/test/java/com/r3/developers/csdetemplate/MyFirstFlowTest.java b/src/test/java/com/r3/developers/csdetemplate/MyFirstFlowTest.java
index 925ae5c..e343318 100644
--- a/src/test/java/com/r3/developers/csdetemplate/MyFirstFlowTest.java
+++ b/src/test/java/com/r3/developers/csdetemplate/MyFirstFlowTest.java
@@ -15,8 +15,8 @@ class MyFirstFlowTest {
     private MemberX500Name bobX500 = MemberX500Name.parse("CN=Bob, OU=Test Dept, O=R3, L=London, C=GB");
 
     @Test
+    @SuppressWarnings("unchecked")
     public void test_that_MyFirstFLow_returns_correct_message() {
-
         // Instantiate an instance of the Simulator
         Simulator simulator = new Simulator();