diff --git a/tests/unit/test_search.py b/tests/unit/test_search.py
new file mode 100644
index 0000000..75f8148
--- /dev/null
+++ b/tests/unit/test_search.py
@@ -0,0 +1,67 @@
+"""Unit tests for SearchService."""
+
+import pytest
+from unittest.mock import AsyncMock, MagicMock
+from memory_manager.core.services import SearchService
+from memory_manager.db.models import MemoryCategory
+
+
+@pytest.fixture
+def mock_repository():
+    return AsyncMock()
+
+
+@pytest.fixture
+def search_service(mock_repository):
+    return SearchService(mock_repository)
+
+
+class TestSearchService:
+    @pytest.mark.asyncio
+    async def test_search_basic(self, search_service, mock_repository):
+        mock_entries = [
+            MagicMock(to_dict=lambda: {"id": 1, "title": "Test Entry", "content": "Test content"}),
+        ]
+        mock_repository.search_entries = AsyncMock(return_value=mock_entries)
+
+        result = await search_service.search(query="test")
+
+        assert len(result) == 1
+        assert result[0]["title"] == "Test Entry"
+        mock_repository.search_entries.assert_called_once()
+
+    @pytest.mark.asyncio
+    async def test_search_with_category(self, search_service, mock_repository):
+        mock_repository.search_entries = AsyncMock(return_value=[])
+
+        await search_service.search(
+            query="test",
+            category=MemoryCategory.DECISION,
+        )
+
+        call_args = mock_repository.search_entries.call_args
+        assert call_args.kwargs["category"] == MemoryCategory.DECISION
+
+    @pytest.mark.asyncio
+    async def test_search_with_filters(self, search_service, mock_repository):
+        mock_repository.search_entries = AsyncMock(return_value=[])
+
+        await search_service.search(
+            query="test",
+            agent_id="test-agent",
+            project_path="/test",
+            limit=50,
+        )
+
+        call_args = mock_repository.search_entries.call_args
+        assert call_args.kwargs["agent_id"] == "test-agent"
+        assert call_args.kwargs["project_path"] == "/test"
+        assert call_args.kwargs["limit"] == 50
+
+    @pytest.mark.asyncio
+    async def test_search_empty_results(self, search_service, mock_repository):
+        mock_repository.search_entries = AsyncMock(return_value=[])
+
+        result = await search_service.search(query="nonexistent")
+
+        assert len(result) == 0