diff --git a/src/test.rs b/src/test.rs
index 6d861c03..3069371b 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -41,14 +41,14 @@ fn test_nulls() {
     let conn = PostgresConnection::connect("postgres://postgres@127.0.0.1:5432");
 
     do conn.in_transaction |trans| {
-        conn.prepare("CREATE TABLE foo (
+        trans.prepare("CREATE TABLE foo (
                         id BIGINT PRIMARY KEY,
                         val VARCHAR
                       )").update([]);
-        conn.prepare("INSERT INTO foo (id, val) VALUES ($1, $2), ($3, $4)")
+        trans.prepare("INSERT INTO foo (id, val) VALUES ($1, $2), ($3, $4)")
                 .update([&1 as &ToSql, & &"foobar" as &ToSql,
                          &2 as &ToSql, &None::<~str> as &ToSql]);
-        let stmt = conn.prepare("SELECT id, val FROM foo ORDER BY id");
+        let stmt = trans.prepare("SELECT id, val FROM foo ORDER BY id");
         let result = stmt.query([]);
 
         assert_eq!(~[Some(~"foobar"), None],