diff --git a/repo_cloner/lib/detector.py b/repo_cloner/lib/detector.py
index 912d259..034329e 100644
--- a/repo_cloner/lib/detector.py
+++ b/repo_cloner/lib/detector.py
@@ -164,11 +164,11 @@ class Detector:
 			log.debug(f"Fingerprint file does not exist - run needed")
 			return True
 		old_fingerprint = self._detector_sum.read_text().strip()
-		return not old_fingerprint == self._repo.repo_fingerprint
+		return not old_fingerprint == self._repo.repo_fingerprint()
 
 	def persist_fingerprint(self):
 		log.debug(f"Persisting detector fingerprint")
-		self._detector_sum.write_text(str(self._repo.repo_fingerprint))
+		self._detector_sum.write_text(str(self._repo.repo_fingerprint()))
 
 	def run(self, callback: Callable[[DetectedCommit], None]) -> int:
 		log.info(f"Running commit detector")
diff --git a/tests/lib/test_detector.py b/tests/lib/test_detector.py
index bc7a6b2..450048e 100644
--- a/tests/lib/test_detector.py
+++ b/tests/lib/test_detector.py
@@ -213,7 +213,7 @@ def test_initialize_caches(tmp_path):
 
 def test_check_fingerprint(tmp_path):
 	mocks = {
-		'repo_fingerprint': PropertyMock(return_value = "FingerPrint"),
+		'repo_fingerprint': MagicMock(return_value = "FingerPrint"),
 	}
 
 	repo = tmp_path.joinpath("repo.git")
@@ -236,7 +236,7 @@ def test_check_fingerprint(tmp_path):
 
 def test_persist_fingerprint(tmp_path):
 	mocks = {
-		'repo_fingerprint': PropertyMock(return_value = "FingerPrint"),
+		'repo_fingerprint': MagicMock(return_value = "FingerPrint"),
 	}
 
 	repo = tmp_path.joinpath("repo.git")
@@ -340,7 +340,7 @@ def test_run(tmp_path, caplog):
 		'list_commits':     MagicMock(return_value = commits_named_new),
 		'list_branches':    MagicMock(return_value = branches_new),
 		'list_tags':        MagicMock(return_value = tags_new),
-		'repo_fingerprint': PropertyMock(return_value = "some-fingerprint"),
+		'repo_fingerprint': MagicMock(return_value = "some-fingerprint"),
 	}
 
 	repo = tmp_path.joinpath("repo.git")