diff --git a/lib/fs/filesystem_copy_range_test.go b/lib/fs/filesystem_copy_range_test.go
index 04328be0f..d8fb3efc9 100644
--- a/lib/fs/filesystem_copy_range_test.go
+++ b/lib/fs/filesystem_copy_range_test.go
@@ -8,6 +8,7 @@ package fs
 
 import (
 	"bytes"
+	"errors"
 	"io"
 	"math/rand"
 	"os"
@@ -329,7 +330,7 @@ func TestCopyRange(tttt *testing.T) {
 								t.Fatal("dst file is not a basic file")
 							}
 							if err := impl(srcBasic, dstBasic, testCase.srcOffset, testCase.dstOffset, testCase.copySize); err != nil {
-								if err == syscall.ENOTSUP {
+								if errors.Is(err, errors.ErrUnsupported) {
 									// Test runner can adjust directory in which to run the tests, that allow broader tests.
 									t.Skip("Not supported on the current filesystem, set STFSTESTPATH env var.")
 								}