diff --git a/geocoder/admin0/extension/expected/cdb_geocoder_admin0_test.out b/geocoder/admin0/extension/expected/cdb_geocoder_admin0_test.out
index 834ab14..92a15ff 100644
--- a/geocoder/admin0/extension/expected/cdb_geocoder_admin0_test.out
+++ b/geocoder/admin0/extension/expected/cdb_geocoder_admin0_test.out
@@ -11,3 +11,12 @@ SELECT (admin0_synonym_lookup(Array['United States', 'ESP'])).*;
  ESP           | 
 (2 rows)
 
+-- Check that the geocoding function is callable, should return success = false
+SELECT (geocode_admin0_polygons(Array['Spain', 'USA', ''])).*;
+   q   | geom | success 
+-------+------+---------
+       |      | f
+ Spain |      | f
+ USA   |      | f
+(3 rows)
+
diff --git a/geocoder/admin0/extension/sql/cdb_geocoder_admin0_test.sql b/geocoder/admin0/extension/sql/cdb_geocoder_admin0_test.sql
index c5fe53f..e782008 100644
--- a/geocoder/admin0/extension/sql/cdb_geocoder_admin0_test.sql
+++ b/geocoder/admin0/extension/sql/cdb_geocoder_admin0_test.sql
@@ -6,3 +6,6 @@ CREATE EXTENSION cdb_geocoder_admin0;
 
 -- Check that the synonym function is callable, should return NULL
 SELECT (admin0_synonym_lookup(Array['United States', 'ESP'])).*;
+
+-- Check that the geocoding function is callable, should return success = false
+SELECT (geocode_admin0_polygons(Array['Spain', 'USA', ''])).*;