diff --git a/expected/hypopg.out b/expected/hypopg.out
index 5e98da8..f3af1bd 100644
--- a/expected/hypopg.out
+++ b/expected/hypopg.out
@@ -105,6 +105,26 @@ ORDER BY indexrelid;
  4120 kB
 (3 rows)
 
+-- locally disable hypoopg
+SET hypopg.enabled to false;
+-- no hypothetical index should be used
+SELECT COUNT(*) FROM do_explain('SELECT * FROM hypo WHERE id = 1') e
+WHERE e ~ 'Index.*<\d+>btree_hypo.*';
+ count 
+-------
+     0
+(1 row)
+
+-- locally re-enable hypoopg
+SET hypopg.enabled to true;
+-- hypothetical index should be used
+SELECT COUNT(*) FROM do_explain('SELECT * FROM hypo WHERE id = 1') e
+WHERE e ~ 'Index.*<\d+>btree_hypo.*';
+ count 
+-------
+     1
+(1 row)
+
 -- Remove one hypothetical index
 SELECT hypopg_drop_index(indexrelid) FROM hypopg() ORDER BY indexrelid LIMIT 1;
  hypopg_drop_index 
diff --git a/test/sql/hypopg.sql b/test/sql/hypopg.sql
index b28cd5b..39a5426 100644
--- a/test/sql/hypopg.sql
+++ b/test/sql/hypopg.sql
@@ -70,6 +70,20 @@ SELECT pg_size_pretty(hypopg_relation_size(indexrelid))
 FROM hypopg()
 ORDER BY indexrelid;
 
+-- locally disable hypoopg
+SET hypopg.enabled to false;
+
+-- no hypothetical index should be used
+SELECT COUNT(*) FROM do_explain('SELECT * FROM hypo WHERE id = 1') e
+WHERE e ~ 'Index.*<\d+>btree_hypo.*';
+
+-- locally re-enable hypoopg
+SET hypopg.enabled to true;
+
+-- hypothetical index should be used
+SELECT COUNT(*) FROM do_explain('SELECT * FROM hypo WHERE id = 1') e
+WHERE e ~ 'Index.*<\d+>btree_hypo.*';
+
 -- Remove one hypothetical index
 SELECT hypopg_drop_index(indexrelid) FROM hypopg() ORDER BY indexrelid LIMIT 1;