diff --git a/README.md b/README.md
index e14c0ae..0cced6e 100644
--- a/README.md
+++ b/README.md
@@ -109,3 +109,9 @@ COMPOSE_PROJECT_NAME=quantumleap
 COMPOSE_DOMAIN=quantumleap.srvitkiotlab.itkdev.dk
 COMPOSE_FILES=docker-compose.yml,docker-compose.prod.yml
 ```
+
+## Test data
+
+``` shell
+task test-data:load
+```
diff --git a/Taskfile.yml b/Taskfile.yml
index 1086be1..62aa621 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -11,6 +11,11 @@ dotenv:
 vars:
   DOCKER_COMPOSE: '{{.TASK_DOCKER_COMPOSE | default "docker compose"}}'
 
+includes:
+  test-data:
+    taskfile: ./test-data/Taskfile.yml
+    dir: ./test-data
+
 tasks:
   grafana:reset-database:
     desc: Reset Grafana database
@@ -47,3 +52,7 @@ tasks:
   compose:
     cmds:
       - '{{.DOCKER_COMPOSE}} {{.TASK_ARGS}} {{.CLI_ARGS}}'
+
+  default:
+    silent: true
+    cmd: task --list
diff --git a/test-data/Taskfile.yml b/test-data/Taskfile.yml
new file mode 100644
index 0000000..06bc58b
--- /dev/null
+++ b/test-data/Taskfile.yml
@@ -0,0 +1,37 @@
+# yaml-language-server: $schema=https://taskfile.dev/schema.json
+
+version: '3'
+
+tasks:
+  load:
+    desc: Load test data
+    prompt: Really load test data (and reset the current test data)?
+    cmds:
+      - task: :compose
+        vars:
+          TASK_ARGS: rm --force --stop test-data-timescale
+      - task: :compose
+        vars:
+          TASK_ARGS: up test-data-timescale --detach --wait
+      - task: info
+
+  info:
+    desc: Show test data info
+    cmds:
+      - task: :compose
+        vars:
+          TASK_ARGS: exec test-data-timescale psql quantumleap quantumleap --command '\dt'
+      - task: :compose
+        vars:
+          TASK_ARGS: exec test-data-timescale psql quantumleap quantumleap --command 'SELECT COUNT(*), MIN(time_index), MAX(time_index) FROM "etrefrigerator-sensor"'
+
+  generate-data:etrefrigerator-sensor:
+    desc: Generate etrefrigerator-sensor.csv
+    cmds:
+      - task: python
+        vars:
+          TASK_ARGS: generate-etrefrigerator-sensor.py
+
+  python:
+    internal: true
+    cmd: docker run --rm --volume $PWD:/app --workdir /app python:3 python {{.TASK_ARGS}}
diff --git a/test-data/docker-compose.yml b/test-data/docker-compose.yml
new file mode 100644
index 0000000..5c9095e
--- /dev/null
+++ b/test-data/docker-compose.yml
@@ -0,0 +1,16 @@
+services:
+  test-data-timescale:
+    image: timescale/timescaledb-ha:${TIMESCALE_VERSION:-pg17.9-ts2.25.2-oss}
+    volumes:
+      # https://www.w3tutorials.net/blog/how-to-create-user-database-in-script-for-docker-postgres/
+      - ./test-data/initdb.d/:/docker-entrypoint-initdb.d/
+      - ./test-data/:/test-data/
+    environment:
+      - POSTGRES_PASSWORD=*
+    networks:
+      - quantumleap
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U quantumleap"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
diff --git a/test-data/generate-etrefrigerator-sensor.py b/test-data/generate-etrefrigerator-sensor.py
new file mode 100644
index 0000000..e360b82
--- /dev/null
+++ b/test-data/generate-etrefrigerator-sensor.py
@@ -0,0 +1,53 @@
+import csv
+import datetime as dt
+import random
+import sys
+import uuid
+
+random.seed(19750523)
+
+number_of_rows=100_000_000
+number_of_rows=1_000_000
+
+filename='initdb.d/etrefrigerator-sensor.csv'
+
+entity_type = 'refrigerator-sensor'
+entity_id = 'refrigerator-sensor:5e318760-Milesight'
+fiware_servicepath = ''
+instanceid = f'urn:ngsi-ld:{uuid.UUID(int=random.getrandbits(128))}'
+appliance = 'Fryser'
+department = 'Department'
+floor = 'floor'
+name = 'name'
+room = 'room'
+
+writer = csv.writer(sys.stdout)
+time = dt.datetime(2025, 1, 1).astimezone()
+
+for i in range(number_of_rows):
+    time_index = 0
+    __original_ngsi_entity__ = None # '{}'
+    battery = random.randint(0, 100)
+    humidity = round(random.uniform(0.00, 100.00), 2)
+    temperature = round(random.uniform(-10, 20), 2)
+
+    writer.writerow([
+        entity_id,
+        entity_type,
+        time.isoformat(),
+        fiware_servicepath,
+        __original_ngsi_entity__,
+        instanceid,
+        appliance,
+        battery,
+        department,
+        floor,
+        humidity,
+        name,
+        room,
+        temperature,
+    ])
+
+    time += dt.timedelta(minutes=10)
+
+# print(f'{number_of_rows} rows written to file {filename}.')
diff --git a/test-data/initdb.d/.gitignore b/test-data/initdb.d/.gitignore
new file mode 100644
index 0000000..afed073
--- /dev/null
+++ b/test-data/initdb.d/.gitignore
@@ -0,0 +1 @@
+*.csv
diff --git a/test-data/initdb.d/01-init.sql b/test-data/initdb.d/01-init.sql
new file mode 100644
index 0000000..43357ab
--- /dev/null
+++ b/test-data/initdb.d/01-init.sql
@@ -0,0 +1,10 @@
+-- # @todo Rewrite to use environment variables (cf. https://stackoverflow.com/a/70976611)
+CREATE ROLE quantumleap LOGIN PASSWORD '*';
+GRANT pg_execute_server_program TO quantumleap;
+
+CREATE DATABASE quantumleap OWNER quantumleap ENCODING 'UTF8';
+
+\connect quantumleap
+
+CREATE EXTENSION IF NOT EXISTS postgis CASCADE;
+CREATE EXTENSION IF NOT EXISTS timescaledb CASCADE;
diff --git a/test-data/initdb.d/02-load-data.sql b/test-data/initdb.d/02-load-data.sql
new file mode 100644
index 0000000..806311a
--- /dev/null
+++ b/test-data/initdb.d/02-load-data.sql
@@ -0,0 +1,46 @@
+-- pg_dump --schema-only --schema="public" --table=etrefrigerator-sensor quantumleap
+
+\connect quantumleap
+
+--
+-- Name: etrefrigerator-sensor; Type: TABLE; Schema: public; Owner: quantumleap
+--
+
+CREATE TABLE public."etrefrigerator-sensor" (
+    entity_id text,
+    entity_type text,
+    time_index timestamp with time zone NOT NULL,
+    fiware_servicepath text,
+    __original_ngsi_entity__ jsonb,
+    instanceid text,
+    appliance text,
+    battery bigint,
+    department text,
+    floor text,
+    humidity double precision,
+    name text,
+    room text,
+    temperature double precision
+);
+
+
+ALTER TABLE public."etrefrigerator-sensor" OWNER TO quantumleap;
+
+--
+-- Name: etrefrigerator-sensor_time_index_idx; Type: INDEX; Schema: public; Owner: quantumleap
+--
+
+CREATE INDEX "etrefrigerator-sensor_time_index_idx" ON public."etrefrigerator-sensor" USING btree (time_index DESC);
+
+
+--
+-- Name: ix_etrefrigerator-sensor_eid_and_tx; Type: INDEX; Schema: public; Owner: quantumleap
+--
+
+CREATE INDEX "ix_etrefrigerator-sensor_eid_and_tx" ON public."etrefrigerator-sensor" USING btree (entity_id, time_index DESC);
+
+
+-- docker run --rm --volume $PWD:/app --workdir /app python:3 python generate-etrefrigerator-sensor.py
+
+COPY public."etrefrigerator-sensor" (entity_id, entity_type, time_index, fiware_servicepath, __original_ngsi_entity__, instanceid, appliance, battery, department, floor, humidity, name, room, temperature)
+FROM PROGRAM 'python3 /test-data/generate-etrefrigerator-sensor.py' CSV;