diff --git a/cmd/xl-storage_test.go b/cmd/xl-storage_test.go
index 593e1a9e0..918234c97 100644
--- a/cmd/xl-storage_test.go
+++ b/cmd/xl-storage_test.go
@@ -1704,7 +1704,8 @@ func TestXLStorageVerifyFile(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if _, err := f.WriteString("a"); err != nil {
+	// Replace first 256 with 'a'.
+	if _, err := f.WriteString(strings.Repeat("a", 256)); err != nil {
 		t.Fatal(err)
 	}
 	f.Close()