diff --git a/reforis_diagnostics/__init__.py b/reforis_diagnostics/__init__.py
index 5187618f22ddf677e87e5416212d1c3ba2d9d605..edbbe6fdf7d574583c551f542450fa98c793f39a 100644
--- a/reforis_diagnostics/__init__.py
+++ b/reforis_diagnostics/__init__.py
@@ -10,8 +10,9 @@ from pathlib import Path
 
 from flask import Blueprint, current_app, request, send_file, jsonify
 from flask_babel import gettext as _
+
 from reforis.foris_controller_api import APIError
-from reforis.foris_controller_api.utils import validate_json
+from reforis.foris_controller_api.utils import log_error, validate_json
 
 
 BASE_DIR = Path(__file__).parent
@@ -46,7 +47,7 @@ def post_report():
 
     response = current_app.backend.perform('diagnostics', 'prepare_diagnostic', request.json)
     if not response.get('diag_id'):
-        current_app.logger.error('Invalid backend response for creating diagnostics report: %s', response)
+        log_error(current_app, f'Invalid backend response for creating diagnostics report: {response}', request)
         return jsonify(_('Cannot create diagnostics report')), HTTPStatus.INTERNAL_SERVER_ERROR
     return jsonify(response), HTTPStatus.ACCEPTED
 
@@ -98,7 +99,7 @@ def delete_report(report_id):
         'remove_diagnostic',
         {'diag_id': report_id},
     )
-    if not response['result']:
-        current_app.logger.error('Invalid backend response for deleting diagnostics report: %s', response)
+    if response.get('result') is not True:
+        log_error(current_app, f'Invalid backend response for deleting diagnostics report: {response}', request)
         return jsonify(_('Cannot delete report')), HTTPStatus.INTERNAL_SERVER_ERROR
     return '', HTTPStatus.NO_CONTENT
diff --git a/tests/conftest.py b/tests/conftest.py
index d93b0dbc969118d058d0180f990d2c591ecd0ca4..edcb9917b6b2b598e0879894bb2ecd12ce13e175 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,14 +1,11 @@
 import pytest
-from flask import Flask
-from flask_babel import Babel
 
 from reforis_diagnostics import blueprint
 
 
+pytest_plugins = 'reforis.test_utils.fixtures'
+
+
 @pytest.fixture(scope='module')
-def app():
-    app = Flask(__name__)
-    app.register_blueprint(blueprint)
-    app.backend = None
-    Babel(app)
-    return app
+def app(app_with_blueprint):
+    return app_with_blueprint(blueprint)