diff --git a/tests/__init__.py b/tests/__init__.py
index e69de29..198ebfa 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -0,0 +1,43 @@
+import pytest
+from datetime import datetime
+from src.models import Commit
+
+
+class TestCommitPatternAnalyzer:
+    def test_analyze_empty_repo(self):
+        from src.analyzers import GitRepository
+        repo = GitRepository("/fake/path")
+        from src.analyzers import CommitPatternAnalyzer
+        analyzer = CommitPatternAnalyzer(repo, days=30)
+        result = analyzer.analyze()
+        assert result is None
+
+
+class TestCodeChurnAnalyzer:
+    def test_analyze_empty_repo(self):
+        from src.analyzers import GitRepository
+        repo = GitRepository("/fake/path")
+        from src.analyzers import CodeChurnAnalyzer
+        analyzer = CodeChurnAnalyzer(repo, days=30)
+        result = analyzer.analyze()
+        assert result is None
+
+
+class TestVelocityAnalyzer:
+    def test_analyze_empty_repo(self):
+        from src.analyzers import GitRepository
+        repo = GitRepository("/fake/path")
+        from src.analyzers import VelocityAnalyzer
+        analyzer = VelocityAnalyzer(repo, days=30)
+        result = analyzer.analyze()
+        assert result is None
+
+
+class TestRiskyCommitDetector:
+    def test_detect_no_commits(self):
+        from src.analyzers import GitRepository
+        repo = GitRepository("/fake/path")
+        from src.analyzers import RiskyCommitDetector
+        detector = RiskyCommitDetector(repo, days=30)
+        result = detector.analyze()
+        assert result is None