diff --git a/tests/db/test_db.py b/tests/db/test_db.py
index fc75b20..8e33584 100644
--- a/tests/db/test_db.py
+++ b/tests/db/test_db.py
@@ -1,5 +1,6 @@
 import datetime
 import os
+import random
 from typing import Optional
 from zoneinfo import ZoneInfo
 
@@ -12,8 +13,7 @@
 import blitzortung
 from blitzortung.service.general import create_time_interval
 
-image = "postgres:16-alpine"
-image = "postgis/postgis:16-3.5"
+image = "postgis/postgis:18-3.6"
 postgres = PostgresContainer(image)
 
 
@@ -99,26 +99,30 @@ def test_full_table_name(self, base):
     def test_get_timezone(self, base):
         assert_that(base.get_timezone()).is_equal_to(datetime.timezone.utc)
 
-    def test_fix_timezone(self, base):
+    @pytest.fixture
+    def cet_timezone(self):
+        return ZoneInfo("Europe/Berlin")
+
+    def test_fix_timezone(self, base, cet_timezone):
         assert_that(base.fix_timezone(None)).is_none()
 
-        time = datetime.datetime(2013, 1, 1, 12, 0, 0, tzinfo=ZoneInfo("CET"))
+        time = datetime.datetime(2013, 1, 1, 12, 0, 0, tzinfo=cet_timezone)
         utc_time = datetime.datetime(2013, 1, 1, 11, 0, 0, tzinfo=ZoneInfo("UTC"))
 
         assert_that(base.fix_timezone(time)).is_equal_to(utc_time)
 
-    def test_from_bare_utc_to_timezone(self, base):
-        base.set_timezone(ZoneInfo("CET"))
+    def test_from_bare_utc_to_timezone(self, base, cet_timezone):
+        base.set_timezone(cet_timezone)
 
-        time = datetime.datetime(2013, 1, 1, 12, 0, 0, tzinfo=ZoneInfo("CET"))
+        time = datetime.datetime(2013, 1, 1, 12, 0, 0, tzinfo=cet_timezone)
         utc_time = datetime.datetime(2013, 1, 1, 11, 0, 0)
 
         assert_that(base.from_bare_utc_to_timezone(utc_time)).is_equal_to(time)
 
-    def test_from_timezone_to_bare_utc(self, base):
-        base.set_timezone(ZoneInfo("CET"))
+    def test_from_timezone_to_bare_utc(self, base, cet_timezone):
+        base.set_timezone(cet_timezone)
 
-        time = datetime.datetime(2013, 1, 1, 12, 0, 0, tzinfo=ZoneInfo("CET"))
+        time = datetime.datetime(2013, 1, 1, 12, 0, 0, tzinfo=cet_timezone)
         utc_time = datetime.datetime(2013, 1, 1, 11, 0, 0)
 
         assert_that(base.from_timezone_to_bare_utc(time)).is_equal_to(utc_time)
@@ -274,6 +278,36 @@ def test_get_latest_time_with_region_mismatch(strikes, strike_factory, time_inte
 
     assert result is None
 
+def test_bench_insert(strike_factory, strikes, benchmark):
+    strike = strike_factory(11, 49)
+    def insert():
+        strikes.insert(strike, 1)
+
+    benchmark.pedantic(insert, args=(), rounds=10, iterations=20)
+
+def test_bench_select(strike_factory, strikes, benchmark):
+    for i in range(100):
+        strike = strike_factory(11 + random.randrange(-100, 100, 1) / 100, 49 + random.randrange(-100, 100, 1) / 100)
+        strikes.insert(strike, 1)
+
+    def select():
+        result = strikes.select()
+        assert len(list(result)) == 100
+
+    benchmark.pedantic(select, args=(), rounds=10, iterations=100)
+
+def test_bench_select_grid(strike_factory, grid_factory, strikes, time_interval, benchmark):
+    for i in range(100):
+        strike = strike_factory(11 + random.randrange(-100, 100, 1) / 100, 49 + random.randrange(-100, 100, 1) / 100)
+        strikes.insert(strike, 1)
+
+    grid = grid_factory.get_for(5000)
+
+    def select():
+        result = strikes.select_grid(grid, 0, time_interval=time_interval)
+        assert len(list(result)) <= 100
+
+    benchmark.pedantic(select, args=(), rounds=10, iterations=100)
 
 @pytest.mark.parametrize("raster_size,expected", [
     (100000, (1, 1, 1, 0)),