diff --git a/vehicle/tesla/helper_test.go b/vehicle/tesla/helper_test.go
new file mode 100644
index 000000000..e03b43b71
--- /dev/null
+++ b/vehicle/tesla/helper_test.go
@@ -0,0 +1,11 @@
+package tesla
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestApiError(t *testing.T) {
+	assert.Nil(t, apiError(nil))
+}