diff --git a/test/message/append.cpp b/test/message/append.cpp
index 84dcc28..fcf3dd9 100644
--- a/test/message/append.cpp
+++ b/test/message/append.cpp
@@ -63,6 +63,8 @@
             break;
         }
     }
+
+    return nullptr;
 }
 
 auto newMethodCall__test(sdbusplus::bus::bus& b)
diff --git a/test/message/read.cpp b/test/message/read.cpp
index 6472907..de5dc89 100644
--- a/test/message/read.cpp
+++ b/test/message/read.cpp
@@ -65,6 +65,8 @@
             break;
         }
     }
+
+    return nullptr;
 }
 
 auto newMethodCall__test(sdbusplus::bus::bus& b)