diff --git a/src/pg/test/sql/08_interpolation_test.sql b/src/pg/test/sql/08_interpolation_test.sql
index cb0d2e4..c45184f 100644
--- a/src/pg/test/sql/08_interpolation_test.sql
+++ b/src/pg/test/sql/08_interpolation_test.sql
@@ -6,7 +6,7 @@ WITH a AS (
     ARRAY[ST_GeomFromText('POINT(2.1744 41.403)'),ST_GeomFromText('POINT(2.1228 41.380)'),ST_GeomFromText('POINT(2.1511 41.374)'),ST_GeomFromText('POINT(2.1528 41.413)'),ST_GeomFromText('POINT(2.165 41.391)'),ST_GeomFromText('POINT(2.1498 41.371)'),ST_GeomFromText('POINT(2.1533 41.368)'),ST_GeomFromText('POINT(2.131386 41.41399)')] AS g
 )
 SELECT
-    CDB_SpatialInterpolation(g, vals, ST_GeomFromText('POINT(2.154 41.37)'),0) as NN,
-    CDB_SpatialInterpolation(g, vals, ST_GeomFromText('POINT(2.154 41.37)'),1) as NNI,
-    CDB_SpatialInterpolation(g, vals, ST_GeomFromText('POINT(2.154 41.37)'),2) as IDW
+    cdb_crankshaft.CDB_SpatialInterpolation(g, vals, ST_GeomFromText('POINT(2.154 41.37)'),0) as NN,
+    cdb_crankshaft.CDB_SpatialInterpolation(g, vals, ST_GeomFromText('POINT(2.154 41.37)'),1) as NNI,
+    cdb_crankshaft.CDB_SpatialInterpolation(g, vals, ST_GeomFromText('POINT(2.154 41.37)'),2) as IDW
 FROM a;