diff --git a/hello-stratum.morph b/hello-stratum.morph
index 73ed482..475fe0f 100644
--- a/hello-stratum.morph
+++ b/hello-stratum.morph
@@ -2,7 +2,8 @@ chunks:
 - build-depends: []
   build-mode: test
   name: hello
-  ref: master
+  ref: newbranch
   repo: test:hello
+  unpetrify-ref: master
 kind: stratum
 name: hello-stratum
diff --git a/hello-system.morph b/hello-system.morph
index 3f7b4d3..199c924 100644
--- a/hello-system.morph
+++ b/hello-system.morph
@@ -3,5 +3,6 @@ kind: system
 name: hello-system
 strata:
 - morph: hello-stratum
-  ref: master
+  ref: newbranch
   repo: test:morphs
+  unpetrify-ref: master