diff --git a/bytes/bytes.go b/bytes/regexp.go
similarity index 100%
rename from bytes/bytes.go
rename to bytes/regexp.go
diff --git a/bytes/regexp_test.go b/bytes/regexp_test.go
new file mode 100644
index 0000000..fe1b656
--- /dev/null
+++ b/bytes/regexp_test.go
@@ -0,0 +1,11 @@
+package bytes_test
+
+import "testing"
+
+func Todo(t *testing.T) {
+	t.Fatalf("TODO")
+}
+
+func TestRegexp(t *testing.T) {
+	Todo(t)
+}