diff --git a/google/internal/oauth/stsExchange.go b/google/internal/oauth/sts_exchange.go
similarity index 100%
rename from google/internal/oauth/stsExchange.go
rename to google/internal/oauth/sts_exchange.go
diff --git a/google/internal/oauth/stsExchange_test.go b/google/internal/oauth/sts_exchange_test.go
similarity index 100%
rename from google/internal/oauth/stsExchange_test.go
rename to google/internal/oauth/sts_exchange_test.go