diff --git a/upstream/upstream_internal_test.go b/upstream/upstream_internal_test.go
index 6342ff759..b11ece4d4 100644
--- a/upstream/upstream_internal_test.go
+++ b/upstream/upstream_internal_test.go
@@ -28,7 +28,7 @@ import (
 
 // TODO(ameshkov): Make tests here not depend on external servers.
 
-// TODO(d.kolyshev): Remove this after migrating dnscrypt to slog
+// TODO(d.kolyshev): Remove this after migrating dnscrypt to slog.
 func TestMain(m *testing.M) {
 	testutil.DiscardLogOutput(m)
 }