diff --git a/setup.py b/setup.py
index 5959e3b..1ccbcea 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ with open('README.md', encoding='utf-8') as f:
     long_description = f.read()
 
 tests_require = [
-    'pytest-cov', 'hypothesis>=3.7.0', 'pytest>=3.4.0', 'py>=1.5.0',
+    'pytest-cov', 'hypothesis>=3.7.0', 'pytest==3.4.2', 'py>=1.5.0',
     'beautifulsoup4==4.6.0', 'flake8>=3.4.1', 'pylint>=1.7.2'
 ],
 
diff --git a/tests/test_bukuDb.py b/tests/test_bukuDb.py
index c1c514f..7856b05 100644
--- a/tests/test_bukuDb.py
+++ b/tests/test_bukuDb.py
@@ -1309,6 +1309,27 @@ def test_load_firefox_database(firefox_db, add_pt):
     assert call_args_list_dict == res_pickle
 
 
+@pytest.mark.parametrize(
+    'keyword_results, stag_results, exp_res',
+    [
+        ([], [], []),
+        (['item1'], ['item1', 'item2'], ['item1']),
+        (['item2'], ['item1'], []),
+    ]
+)
+def test_search_keywords_and_filter_by_tags(keyword_results, stag_results, exp_res):
+    """test method."""
+    # init
+    import buku
+    bdb = buku.BukuDb()
+    bdb.searchdb = mock.Mock(return_value=keyword_results)
+    bdb.search_by_tag = mock.Mock(return_value=stag_results)
+    # test
+    res = bdb.search_keywords_and_filter_by_tags(
+        mock.Mock(), mock.Mock(), mock.Mock(), mock.Mock(), [])
+    assert exp_res == res
+
+
 # Helper functions for testcases