diff --git a/.smalltalk.ston b/.smalltalk.ston
index 4480f89..c70b36e 100644
--- a/.smalltalk.ston
+++ b/.smalltalk.ston
@@ -8,7 +8,7 @@ SmalltalkCISpec {
     }
   ],
   #testing : {
-  #categories : [ 'SustainableSimulations-Tests' ]
+    #categories : [ 'SustainableSimulations-Tests' ],
     #coverage : {
       #packages : [ 'SustainableSimulations-Core.*', 'SustainableSimulations-Roads.*', 'SustainableSimulations-UI.*' ]
     }