diff --git a/memfs/memory_test.go b/memfs/memory_test.go
index 78acc42..36dbaa0 100644
--- a/memfs/memory_test.go
+++ b/memfs/memory_test.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"runtime"
 	"testing"
 
 	"github.com/go-git/go-billy/v5"