diff --git a/expected/hypopg.out b/expected/hypopg.out
index f3af1bd..f62bfad 100644
--- a/expected/hypopg.out
+++ b/expected/hypopg.out
@@ -139,3 +139,10 @@ SELECT hypopg_reset();
  
 (1 row)
 
+-- indexes on expression are not handle
+SELECT hypopg_create_index('CREATE INDEX ON hypo (md5(val))');
+WARNING:  hypopg: hypothetical indexes on expression are not supported yet
+ hypopg_create_index 
+---------------------
+(0 rows)
+
diff --git a/test/sql/hypopg.sql b/test/sql/hypopg.sql
index 39a5426..bc8c2c1 100644
--- a/test/sql/hypopg.sql
+++ b/test/sql/hypopg.sql
@@ -89,3 +89,6 @@ SELECT hypopg_drop_index(indexrelid) FROM hypopg() ORDER BY indexrelid LIMIT 1;
 
 -- Remove all the hypothetical indexes
 SELECT hypopg_reset();
+
+-- indexes on expression are not handle
+SELECT hypopg_create_index('CREATE INDEX ON hypo (md5(val))');