diff --git a/tests/unit/metrics/test_exporter.py b/tests/unit/metrics/test_exporter.py
index 32463949a..4ff498888 100644
--- a/tests/unit/metrics/test_exporter.py
+++ b/tests/unit/metrics/test_exporter.py
@@ -107,7 +107,7 @@ def test_is_running_returns_true_when_server_thread_is_alive(self):
 
 
 @mock.patch(
-    "logprep.metrics.exporter.PrometheusExporter._prepare_multiprocessing",
+    "logprep.metrics.exporter.PrometheusExporter.prepare_multiprocessing",
     new=lambda *args, **kwargs: None,
 )
 class TestHealthEndpoint: