3 files changed, 5 insertions, 5 deletions
diff --git a/std/fs/copy.ts b/std/fs/copy.ts
index d45ac17c9..269340e85 100644
--- a/std/fs/copy.ts
+++ b/std/fs/copy.ts
@@ -2,7 +2,7 @@
 import * as path from "../path/mod.ts";
 import { ensureDir, ensureDirSync } from "./ensure_dir.ts";
 import { isSubdir, getFileInfoType } from "./_util.ts";
-import { assert } from "../testing/asserts.ts";
+import { assert } from "../_util/assert.ts";
 
 const isWindows = Deno.build.os === "windows";
 
diff --git a/std/fs/expand_glob.ts b/std/fs/expand_glob.ts
index e5abdabcf..4b7b11885 100644
--- a/std/fs/expand_glob.ts
+++ b/std/fs/expand_glob.ts
@@ -14,7 +14,7 @@ import {
   walk,
   walkSync,
 } from "./walk.ts";
-import { assert } from "../testing/asserts.ts";
+import { assert } from "../_util/assert.ts";
 const { cwd } = Deno;
 type FileInfo = Deno.FileInfo;
 
diff --git a/std/fs/walk.ts b/std/fs/walk.ts
index ccd5097a4..553e52b2e 100644
--- a/std/fs/walk.ts
+++ b/std/fs/walk.ts
@@ -1,7 +1,7 @@
 // Documentation and interface for walk were adapted from Go
 // https://golang.org/pkg/path/filepath/#Walk
 // Copyright 2009 The Go Authors. All rights reserved. BSD license.
-import { unimplemented, assert } from "../testing/asserts.ts";
+import { assert } from "../_util/assert.ts";
 import { basename, join, normalize } from "../path/mod.ts";
 const { readDir, readDirSync, stat, statSync } = Deno;
 
@@ -107,7 +107,7 @@ export async function* walk(
     if (entry.isSymlink) {
       if (followSymlinks) {
         // TODO(ry) Re-enable followSymlinks.
-        unimplemented();
+        throw new Error("unimplemented");
       } else {
         continue;
       }
@@ -159,7 +159,7 @@ export function* walkSync(
   for (const entry of readDirSync(root)) {
     if (entry.isSymlink) {
       if (followSymlinks) {
-        unimplemented();
+        throw new Error("unimplemented");
       } else {
         continue;
       }