diff --git a/tests/test_visit_merging.py b/tests/test_visit_merging.py
index 1c3e84d4..7a40e993 100644
--- a/tests/test_visit_merging.py
+++ b/tests/test_visit_merging.py
@@ -47,7 +47,7 @@
     "module",
     [
         "pandas",
-        # "koalas"
+        "koalas"
     ],
 )
 @pytest.mark.parametrize(