diff --git a/src/processing/__init__.py b/src/processing/__init__.py
index 6fae0ccdb6c3729877be0cd526e0cad32f83ce01..744b7dd95256272ccc0e3860a7cfc72fbd9db3b7 100644
--- a/src/processing/__init__.py
+++ b/src/processing/__init__.py
@@ -1,5 +1,4 @@
 """
-
 The scene processing part of the toolbox defines methodes
 to transform an image into a place code in the sense
 of Basten and Mallot (2010).
@@ -104,6 +103,10 @@ def skyline(scene):
     return skyline[np.newaxis, :]
 
 
+def mztest():
+  return a
+
+
 def michelson_contrast(scene, size=3):
     """Return the michelson constrast