Rows.Scan errors now include which argument caused error

values_test.go

@@ -1,7 +1,6 @@
 package pgx_test
 
 import (
-	"encoding/json"
 	"github.com/jackc/pgx"
 	"net"
 	"reflect"
@@ -196,7 +195,7 @@ func testJsonInt16ArrayFailureDueToOverflow(t *testing.T, conn *pgx.Conn, typena
 	input := []int{1, 2, 234432}
 	var output []int16
 	err := conn.QueryRow("select $1::"+typename, input).Scan(&output)
-	if _, ok := err.(*json.UnmarshalTypeError); !ok {
+	if err.Error() != "can't scan into dest[0]: json: cannot unmarshal number 234432 into Go value of type int16" {
 		t.Errorf("%s: Expected *json.UnmarkalTypeError, but got %v", typename, err)
 	}
 }