diff --git a/tests/baz/1.0/IBaz.hal b/tests/baz/1.0/IBaz.hal
index 3e1e2b946b..7c5d63aeb1 100644
--- a/tests/baz/1.0/IBaz.hal
+++ b/tests/baz/1.0/IBaz.hal
@@ -49,6 +49,10 @@ interface IBaz extends IBase {
     doStuffAndReturnAString() generates (string something);
     mapThisVector(vec<int32_t> param) generates (vec<int32_t> something);
     callMe(IBazCallback cb);
+
+    callMeLater(IBazCallback cb);
+    iAmFreeNow();
+
     useAnEnum(SomeEnum zzz) generates (SomeEnum kkk);
 
     haveSomeStrings(string[3] array) generates (string[2] result);
diff --git a/tests/baz/1.0/IBazCallback.hal b/tests/baz/1.0/IBazCallback.hal
index b59a107b2c..503b970b8c 100644
--- a/tests/baz/1.0/IBazCallback.hal
+++ b/tests/baz/1.0/IBazCallback.hal
@@ -18,4 +18,5 @@ package android.hardware.tests.baz@1.0;
 
 interface IBazCallback {
     heyItsMe(IBazCallback cb);
+    hey();
 };