diff --git a/tests/unit/session/test_read_gbq_query.py b/tests/unit/session/test_read_gbq_query.py
index 1f9d2fb945..d078c64af7 100644
--- a/tests/unit/session/test_read_gbq_query.py
+++ b/tests/unit/session/test_read_gbq_query.py
@@ -35,3 +35,4 @@ def test_read_gbq_query_sets_destination_table():
 
     assert query == "SELECT 'my-test-query';"
     assert config.destination is not None
+    session.close()