diff --git a/erpnext/stock/doctype/bin/test_bin.py b/erpnext/stock/doctype/bin/test_bin.py
index ef21bcf7833..e66e453aca1 100644
--- a/erpnext/stock/doctype/bin/test_bin.py
+++ b/erpnext/stock/doctype/bin/test_bin.py
@@ -27,6 +27,6 @@ class TestBin(ERPNextTestSuite):
 		self.assertEqual(bin.item_code, item_code)
 
 	def test_index_exists(self):
-		indexes = frappe.db.sql("show index from tabBin where Non_unique = 0", as_dict=1)
-		if not any(index.get("Key_name") == "unique_item_warehouse" for index in indexes):
+		# has_index is db-agnostic; raw "SHOW INDEX" is MySQL-only and errors on Postgres
+		if not frappe.db.has_index("tabBin", "unique_item_warehouse"):
 			self.fail("Expected unique index on item-warehouse")