diff --git a/circle.yml b/circle.yml
index 009dc4b59..648688116 100644
--- a/circle.yml
+++ b/circle.yml
@@ -12,6 +12,7 @@ machine:
   environment:
     CMD1: "cd contribution/checkstyle-tester"
     DEP1: " && sed -i.'' 's/^guava/#guava/' projects-to-test-on.properties"
+    # we need this to let pass 'mvn site' on no-projects mode to download all dependecies
     DEP2: " && echo 'class ClassEmpty{}' > src/main/java/EmptyClass.java"
     DEP3: " && ./launch.sh -Dcheckstyle.config.location=my_check.xml"
     TESTER_DEPENDENCIES: $CMD1$DEP1$DEP2$DEP3