diff --git a/brewman/brewman/models/tzinfoutc.py b/brewman/brewman/models/tzinfoutc.py
index 07b5530a..b9445a67 100644
--- a/brewman/brewman/models/tzinfoutc.py
+++ b/brewman/brewman/models/tzinfoutc.py
@@ -23,9 +23,11 @@ class UTC(tzinfo):
 utc = UTC()
 
 
-def get_age(old_date, now = datetime.utcnow().replace(tzinfo=utc)):
+def get_age(old_date, now = None):
     def isNaive(date):
         return date.tzinfo is None or date.tzinfo.utcoffset(date) is None
+    if now is None:
+        now = datetime.utcnow().replace(tzinfo=utc)
     if isNaive(old_date) == isNaive(now):
         pass
     elif isNaive(old_date):