diff --git a/homeassistant/components/flux_led/config_flow.py b/homeassistant/components/flux_led/config_flow.py
index 035be5b115c..69e40d59f7f 100644
--- a/homeassistant/components/flux_led/config_flow.py
+++ b/homeassistant/components/flux_led/config_flow.py
@@ -299,7 +299,7 @@ class FluxLedConfigFlow(ConfigFlow, domain=DOMAIN):
             # AKA `HF-LPB100-ZJ200`
             return device
         bulb = async_wifi_bulb_for_host(host, discovery=device)
-        bulb.discovery = discovery
+        bulb.discovery = discovery  # type: ignore[assignment]
         try:
             await bulb.async_setup(lambda: None)
         finally:
diff --git a/requirements_test.txt b/requirements_test.txt
index 68945852298..cf0a1e5473f 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -12,7 +12,7 @@ coverage==7.6.8
 freezegun==1.5.1
 license-expression==30.4.0
 mock-open==1.4.0
-mypy-dev==1.15.0a2
+mypy-dev==1.16.0a1
 pre-commit==4.0.0
 pydantic==2.10.6
 pylint==3.3.3