diff --git a/cmd/bisync/bisync_test.go b/cmd/bisync/bisync_test.go
index f7c05d5e8..d33ccece2 100644
--- a/cmd/bisync/bisync_test.go
+++ b/cmd/bisync/bisync_test.go
@@ -329,7 +329,7 @@ func testBisync(ctx context.Context, t *testing.T, path1, path2 string) {
 
 	baseDir, err := os.Getwd()
 	require.NoError(t, err, "get current directory")
-	randName := time.Now().Format("150405") + random.String(2) // some bucket backends don't like dots, keep this short to avoid linux errors
+	randName := time.Now().Format("150405") + random.String(8) // some bucket backends don't like dots, keep this short to avoid linux errors
 	tempDir := filepath.Join(os.TempDir(), randName)
 	workDir := filepath.Join(tempDir, "workdir")