diff --git a/level_go121.go b/level_121.go
similarity index 100%
rename from level_go121.go
rename to level_121.go
diff --git a/level_nogo121.go b/level_no121.go
similarity index 100%
rename from level_nogo121.go
rename to level_no121.go
diff --git a/logger_go121.go b/logger_121.go
similarity index 100%
rename from logger_go121.go
rename to logger_121.go
diff --git a/logger_go121_test.go b/logger_121_test.go
similarity index 100%
rename from logger_go121_test.go
rename to logger_121_test.go
diff --git a/logger_nogo121.go b/logger_no121.go
similarity index 100%
rename from logger_nogo121.go
rename to logger_no121.go