diff --git a/python/tests/sql/test_dataframe_api.py b/python/tests/sql/test_dataframe_api.py
index c3f2bdf414..316a98a76b 100644
--- a/python/tests/sql/test_dataframe_api.py
+++ b/python/tests/sql/test_dataframe_api.py
@@ -137,6 +137,7 @@
     (stf.ST_YMax, ("geom",), "triangle_geom", "", 1.0),
     (stf.ST_YMin, ("geom",), "triangle_geom", "", 0.0),
     (stf.ST_Z, ("b",), "two_points", "", 4.0),
+    (stf.ST_NumPoints, ("line",), "linestring_geom", "", 6),
 
     # predicates
     (stp.ST_Contains, ("geom", lambda: f.expr("ST_Point(0.5, 0.25)")), "triangle_geom", "", True),