testing channels

backend/config/test.exs

@@ -7,8 +7,10 @@ config :backend, BackendWeb.Endpoint,
   secret_key_base: "K4i8bHJci8dPJ6LuZHJo147F1h8Wq+SaK4trNGLxJ1cRGkZPZvvm1zk5wWEYY+o2",
   server: false
 
-# In test we don't send emails
-config :backend, Backend.Mailer, adapter: Swoosh.Adapters.Test
+# Disable OpenTelemetry exporter in tests
+config :opentelemetry,
+  traces_exporter: :none,
+  processors: []
 
 # Print only warnings and errors during test
 config :logger, level: :warning