diff --git a/tests/conftest.py b/tests/conftest.py
index 273ef47..e117c63 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -134,7 +134,7 @@ def sites(db_session):
 def generation_db_values(db_session, sites, init_timestamp):
     """Create some fake generations"""
 
-    n = 100  # 5 hours of readings
+    n = 20*25  # 25 hours of readings
     start_times = [init_timestamp - dt.timedelta(minutes=x * 3) for x in range(n)]
 
     # remove some of the most recent readings (to simulate missing timestamps)