diff --git a/config/versions/testfixtures/v9997/fixture.go b/config/versions/testfixtures/v9997/fixture.go
index 2ef3f96ec00..f612444161c 100644
--- a/config/versions/testfixtures/v9997/fixture.go
+++ b/config/versions/testfixtures/v9997/fixture.go
@@ -8,12 +8,15 @@ import (
 type Version struct {
 }
 
+// Disabled implements the DisabledVersion interface
 func (v *Version) Disabled() {}
 
+// UpgradeConfig implements the ConfigdVersion interface
 func (v *Version) UpgradeConfig(_ context.Context, c []byte) ([]byte, error) {
 	return c, nil
 }
 
+// DowngradeConfig implements the ConfigdVersion interface
 func (v *Version) DowngradeConfig(_ context.Context, c []byte) ([]byte, error) {
 	return c, nil
 }