diff --git a/scripts-available/CDB_Overviews.sql b/scripts-available/CDB_Overviews.sql
index b80be3d..c7c7f7c 100644
--- a/scripts-available/CDB_Overviews.sql
+++ b/scripts-available/CDB_Overviews.sql
@@ -601,7 +601,6 @@ AS $$
     IF array_upper(gtypes, 1) <> 1 OR gtypes[1] <> 'ST_Point' THEN
       -- This strategy only supports datasets with point geomety
       RETURN NULL;
-      RETURN 'x';
     END IF;
 
     --TODO: check applicability: geometry type, minimum number of points...
@@ -610,7 +609,7 @@ AS $$
 
     -- Grid size in pixels at Z level overview_z
     IF grid_px IS NULL THEN
-      grid_px := 7.5;
+      grid_px := 1.0;
     END IF;
 
     SELECT * FROM _cdb_split_table_name(reloid) INTO schema_name, table_name;
@@ -693,7 +692,7 @@ DECLARE
   tolerance_px FLOAT8;
 BEGIN
   -- Use the default tolerance
-  tolerance_px := 2.0;
+  tolerance_px := 1.0;
   RETURN CDB_CreateOverviewsWithToleranceInPixels(reloid, tolerance_px, refscale_strategy, reduce_strategy);
 END;
 $$ LANGUAGE PLPGSQL;
diff --git a/test/CDB_OverviewsTest_expect b/test/CDB_OverviewsTest_expect
index 85627d4..5a936da 100644
--- a/test/CDB_OverviewsTest_expect
+++ b/test/CDB_OverviewsTest_expect
@@ -9,35 +9,30 @@ SELECT 1114
 
 
 
-{_vovw_3_base_bare_t,_vovw_2_base_bare_t,_vovw_1_base_bare_t,_vovw_0_base_bare_t}
-113
+{_vovw_2_base_bare_t,_vovw_1_base_bare_t,_vovw_0_base_bare_t}
+126
 number,int_number,name,start
 AVG(number)::double precision AS number,AVG(int_number)::integer AS int_number,CASE count(*) WHEN 1 THEN MIN(name) ELSE NULL END::text AS name,CASE count(*) WHEN 1 THEN MIN(start) ELSE NULL END::date AS start
 AVG(tab.number)::double precision AS number,AVG(tab.int_number)::integer AS int_number,CASE count(*) WHEN 1 THEN MIN(tab.name) ELSE NULL END::text AS name,CASE count(*) WHEN 1 THEN MIN(tab.start) ELSE NULL END::date AS start
-{_vovw_3_base_t,_vovw_2_base_t,_vovw_1_base_t,_vovw_0_base_t}
-113
+{_vovw_2_base_t,_vovw_1_base_t,_vovw_0_base_t}
+126
 
-{_vovw_3_column_types_t,_vovw_2_column_types_t,_vovw_1_column_types_t,_vovw_0_column_types_t}
+{_vovw_2_column_types_t,_vovw_1_column_types_t,_vovw_0_column_types_t}
 (base_t,0,_vovw_0_base_t)
 (base_t,1,_vovw_1_base_t)
 (base_t,2,_vovw_2_base_t)
-(base_t,3,_vovw_3_base_t)
 (base_t,0,_vovw_0_base_t)
 (base_t,1,_vovw_1_base_t)
 (base_t,2,_vovw_2_base_t)
-(base_t,3,_vovw_3_base_t)
 (base_bare_t,0,_vovw_0_base_bare_t)
 (base_bare_t,1,_vovw_1_base_bare_t)
 (base_bare_t,2,_vovw_2_base_bare_t)
-(base_bare_t,3,_vovw_3_base_bare_t)
 (base_t,0,_vovw_0_base_t)
 (base_t,1,_vovw_1_base_t)
 (base_t,2,_vovw_2_base_t)
-(base_t,3,_vovw_3_base_t)
 (column_types_t,0,_vovw_0_column_types_t)
 (column_types_t,1,_vovw_1_column_types_t)
 (column_types_t,2,_vovw_2_column_types_t)
-(column_types_t,3,_vovw_3_column_types_t)