fix checkpoint

test/src/lib.rs

@@ -257,7 +257,7 @@ mod tests {
         for i in 0..iterations {
             let insert_query = format!("INSERT INTO test VALUES ({})", i);
             do_flush(&conn, &tmp_db)?;
-            conn.clear_page_cache().unwrap();
+            conn.checkpoint().unwrap();
             match conn.query(insert_query) {
                 Ok(Some(ref mut rows)) => loop {
                     match rows.next_row()? {