diff --git a/rowers/plannedsessions.py b/rowers/plannedsessions.py
index 29cceb11..ce71c7c8 100644
--- a/rowers/plannedsessions.py
+++ b/rowers/plannedsessions.py
@@ -334,7 +334,7 @@ def add_workouts_plannedsession(ws,ps,r):
         errors.append('For tests and training sessions, selected workouts must all be done on the same date')
         return result,comments,errors
 
-    if ws.count()>1 and ps.sessiontype == 'test':
+    if len(ws)>1 and ps.sessiontype == 'test':
         errors.append('For tests, you can only attach one workout')
         return result,comments,errors