1 files changed, 2 insertions, 1 deletions
diff --git a/io/bufio.ts b/io/bufio.ts
index 0dd2b94b4..05e6b0a0c 100644
--- a/io/bufio.ts
+++ b/io/bufio.ts
@@ -4,7 +4,8 @@
 // license that can be found in the LICENSE file.
 
 import { Reader, ReadResult, Writer } from "deno";
-import { assert, charCode, copyBytes } from "./util.ts";
+import { charCode, copyBytes } from "./util.ts";
+import { assert } from "../testing/mod.ts";
 
 const DEFAULT_BUF_SIZE = 4096;
 const MIN_BUF_SIZE = 16;