diff --git a/app.py b/app.py
index 3bea4bb..d2430e2 100644
--- a/app.py
+++ b/app.py
@@ -5,7 +5,6 @@ Modularized version with Blueprints
 
 import logging
 import os
-import socket
 from flask import Flask
 from flask_wtf.csrf import CSRFProtect
 from models import db
@@ -100,38 +99,12 @@ def create_app(config: dict | None = None) -> Flask:
 app = create_app()
 
 
-def get_lan_ip() -> str:
-    """Ermittelt die LAN-IP-Adresse dieses Rechners (Best-Effort).
-
-    Öffnet einen UDP-Socket zu einer externen Adresse, um das ausgehende
-    Interface zu bestimmen – es werden dabei keine Daten gesendet.
-    Fällt bei Fehlern auf 127.0.0.1 zurück.
-    """
-    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-    try:
-        s.connect(('8.8.8.8', 80))
-        return s.getsockname()[0]
-    except OSError:
-        return '127.0.0.1'
-    finally:
-        s.close()
-
-
 if __name__ == '__main__':
-    DEBUG = True
-    PORT = 5000
+    logger.info("=" * 50)
+    logger.info("Tipptrainer gestartet")
+    logger.info(f"Version: {app.config['APP_VERSION']}")
+    logger.info(f"Lektionen geladen: {len(app.config['LESSONS'])}")
+    logger.info("Debug-Info verfügbar unter: http://127.0.0.1:5000/debug")
+    logger.info("=" * 50)
 
-    # Banner genau einmal ausgeben: ohne Reloader sofort, mit Reloader nur
-    # im Worker-Prozess (WERKZEUG_RUN_MAIN), nicht im Supervisor.
-    if not DEBUG or os.environ.get('WERKZEUG_RUN_MAIN') == 'true':
-        lan_ip = get_lan_ip()
-        logger.info("=" * 50)
-        logger.info("Tipptrainer gestartet")
-        logger.info(f"Version: {app.config['APP_VERSION']}")
-        logger.info(f"Lektionen geladen: {len(app.config['LESSONS'])}")
-        logger.info(f"Tipp-Training lokal:  http://127.0.0.1:{PORT}")
-        logger.info(f"Tipp-Training im LAN: http://{lan_ip}:{PORT}")
-        logger.info(f"Debug-Info:           http://127.0.0.1:{PORT}/debug")
-        logger.info("=" * 50)
-
-    app.run(debug=DEBUG, host='0.0.0.0', port=PORT)
+    app.run(debug=True, host='0.0.0.0', port=5000)
diff --git a/tests/test_integration_progress.py b/tests/test_integration_progress.py
index c69786c..7aed9b4 100644
--- a/tests/test_integration_progress.py
+++ b/tests/test_integration_progress.py
@@ -5,7 +5,7 @@ import unittest
 import os
 os.environ['FLASK_TESTING'] = 'true'  # Set before importing app
 
-from app import create_app, db
+from app import app, db
 from models import Progress, LessonProgress
 from services.progress_service import ProgressService
 
@@ -15,11 +15,10 @@ class TestProgressServiceIntegration(unittest.TestCase):
 
     def setUp(self):
         """Setup: Test-App und In-Memory-Datenbank"""
-        self.app = create_app({
-            'TESTING': True,
-            'SQLALCHEMY_DATABASE_URI': 'sqlite:///:memory:',
-            'WTF_CSRF_ENABLED': False,
-        })
+        app.config['TESTING'] = True
+        app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///:memory:'
+        app.config['WTF_CSRF_ENABLED'] = False
+        self.app = app
         self.app_context = self.app.app_context()
         self.app_context.push()
         db.create_all()
@@ -260,12 +259,10 @@ class TestResolveCurrentLessonIndex(unittest.TestCase):
     """Tests für die zentrale Lektions-Auflösung (Resume + Validierung)."""
 
     def setUp(self):
-        self.app = create_app({
-            'TESTING': True,
-            'SQLALCHEMY_DATABASE_URI': 'sqlite:///:memory:',
-            'WTF_CSRF_ENABLED': False,
-        })
-        self.app_context = self.app.app_context()
+        app.config['TESTING'] = True
+        app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///:memory:'
+        app.config['WTF_CSRF_ENABLED'] = False
+        self.app_context = app.app_context()
         self.app_context.push()
         db.create_all()
 
diff --git a/tests/test_integration_statistics.py b/tests/test_integration_statistics.py
index 8c5c94b..591ab2b 100644
--- a/tests/test_integration_statistics.py
+++ b/tests/test_integration_statistics.py
@@ -6,7 +6,7 @@ import os
 os.environ['FLASK_TESTING'] = 'true'  # Set before importing app
 
 from datetime import timedelta, date
-from app import create_app, db
+from app import app, db
 from models import LessonStatistic, DailyPractice
 from services.statistics_service import StatisticsService
 
@@ -16,11 +16,10 @@ class TestStatisticsServiceIntegration(unittest.TestCase):
 
     def setUp(self):
         """Setup: Test-App und In-Memory-Datenbank"""
-        self.app = create_app({
-            'TESTING': True,
-            'SQLALCHEMY_DATABASE_URI': 'sqlite:///:memory:',
-            'WTF_CSRF_ENABLED': False,
-        })
+        app.config['TESTING'] = True
+        app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///:memory:'
+        app.config['WTF_CSRF_ENABLED'] = False
+        self.app = app
         self.app_context = self.app.app_context()
         self.app_context.push()
         db.create_all()