diff --git a/lib/ignore/ignore_test.go b/lib/ignore/ignore_test.go
index 32bfa4a781c..231b926e93d 100644
--- a/lib/ignore/ignore_test.go
+++ b/lib/ignore/ignore_test.go
@@ -996,8 +996,8 @@ func TestIssue4901(t *testing.T) {
 		if err == nil {
 			t.Fatal("expected an error")
 		}
-		if fs.IsNotExist(err) {
-			t.Fatal("unexpected error type")
+		if err == fs.ErrNotExist {
+			t.Fatalf("unexpected error type: %T", err)
 		}
 		if !IsParseError(err) {
 			t.Fatal("failure to load included file should be a parse error")