diff --git a/tests/bar/1.0/default/Bar.cpp b/tests/bar/1.0/default/Bar.cpp
index a750fe4..4152bb9 100644
--- a/tests/bar/1.0/default/Bar.cpp
+++ b/tests/bar/1.0/default/Bar.cpp
@@ -165,6 +165,13 @@
     return Void();
 }
 
+Return<void> Bar::haveAInterface(const sp<ISimple> &in,
+            haveAInterface_cb _hidl_cb) {
+    _hidl_cb(in);
+    return Void();
+}
+
+
 IBar* HIDL_FETCH_IBar(const char* /* name */) {
     return new Bar();
 }
diff --git a/tests/bar/1.0/default/Bar.h b/tests/bar/1.0/default/Bar.h
index 71737fe..70bffe7 100644
--- a/tests/bar/1.0/default/Bar.h
+++ b/tests/bar/1.0/default/Bar.h
@@ -71,6 +71,8 @@
 
     Return<void> takeAMask(BitField bf, uint8_t first, const MyMask& second, uint8_t third,
             takeAMask_cb _hidl_cb) override;
+    Return<void> haveAInterface(const sp<ISimple> &in,
+            haveAInterface_cb _hidl_cb) override;
 
 private:
     sp<IFoo> mFoo;