diff --git a/src/internal/testenv/testenv_notwin.go b/src/internal/testenv/testenv_notwin.go
index d8ce6cd385..385397378d 100644
--- a/src/internal/testenv/testenv_notwin.go
+++ b/src/internal/testenv/testenv_notwin.go
@@ -18,3 +18,7 @@ func hasSymlink() (ok bool, reason string) {
 
 	return true, ""
 }
+
+func IsWindowsXP() bool {
+	return false
+}
diff --git a/src/internal/testenv/testenv_windows.go b/src/internal/testenv/testenv_windows.go
index eb8d6ac165..4a7da5fcb6 100644
--- a/src/internal/testenv/testenv_windows.go
+++ b/src/internal/testenv/testenv_windows.go
@@ -46,3 +46,12 @@ func hasSymlink() (ok bool, reason string) {
 
 	return false, ""
 }
+
+func IsWindowsXP() bool {
+	v, err := syscall.GetVersion()
+	if err != nil {
+		panic("GetVersion failed: " + err.Error())
+	}
+	major := byte(v)
+	return major < 6
+}