diff --git a/.coveragerc b/.coveragerc
index 3e9779f55bc..b6972ddde4d 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1117,8 +1117,6 @@ omit =
     homeassistant/components/sesame/lock.py
     homeassistant/components/seven_segments/image_processing.py
     homeassistant/components/seventeentrack/sensor.py
-    homeassistant/components/sfr_box/__init__.py
-    homeassistant/components/sfr_box/coordinator.py
     homeassistant/components/sfr_box/sensor.py
     homeassistant/components/shiftr/*
     homeassistant/components/shodan/sensor.py
diff --git a/tests/components/sfr_box/conftest.py b/tests/components/sfr_box/conftest.py
index 51fe62681a1..f55945c594c 100644
--- a/tests/components/sfr_box/conftest.py
+++ b/tests/components/sfr_box/conftest.py
@@ -1,12 +1,17 @@
 """Provide common SFR Box fixtures."""
+from collections.abc import Generator
+import json
+from unittest.mock import patch
+
 import pytest
+from sfrbox_api.models import DslInfo, SystemInfo
 
 from homeassistant.components.sfr_box.const import DOMAIN
 from homeassistant.config_entries import SOURCE_USER, ConfigEntry
 from homeassistant.const import CONF_HOST
 from homeassistant.core import HomeAssistant
 
-from tests.common import MockConfigEntry
+from tests.common import MockConfigEntry, load_fixture
 
 
 @pytest.fixture(name="config_entry")
@@ -22,3 +27,25 @@ def get_config_entry(hass: HomeAssistant) -> ConfigEntry:
     )
     config_entry.add_to_hass(hass)
     return config_entry
+
+
+@pytest.fixture()
+def system_get_info() -> Generator[SystemInfo, None, None]:
+    """Fixture for SFRBox.system_get_info."""
+    system_info = SystemInfo(**json.loads(load_fixture("system_getInfo.json", DOMAIN)))
+    with patch(
+        "homeassistant.components.sfr_box.coordinator.SFRBox.system_get_info",
+        return_value=system_info,
+    ):
+        yield system_info
+
+
+@pytest.fixture()
+def dsl_get_info() -> Generator[DslInfo, None, None]:
+    """Fixture for SFRBox.dsl_get_info."""
+    dsl_info = DslInfo(**json.loads(load_fixture("dsl_getInfo.json", DOMAIN)))
+    with patch(
+        "homeassistant.components.sfr_box.coordinator.SFRBox.dsl_get_info",
+        return_value=dsl_info,
+    ):
+        yield dsl_info
diff --git a/tests/components/sfr_box/fixtures/dsl_getInfo.json b/tests/components/sfr_box/fixtures/dsl_getInfo.json
new file mode 100644
index 00000000000..be64186a97b
--- /dev/null
+++ b/tests/components/sfr_box/fixtures/dsl_getInfo.json
@@ -0,0 +1,15 @@
+{
+  "linemode": "ADSL2+",
+  "uptime": 450796,
+  "counter": 16,
+  "crc": 0,
+  "status": "up",
+  "noise_down": 5.8,
+  "noise_up": 6.0,
+  "attenuation_down": 28.5,
+  "attenuation_up": 20.8,
+  "rate_down": 5549,
+  "rate_up": 187,
+  "line_status": "No Defect",
+  "training": "Showtime"
+}
diff --git a/tests/components/sfr_box/test_init.py b/tests/components/sfr_box/test_init.py
new file mode 100644
index 00000000000..48bf07fc5e0
--- /dev/null
+++ b/tests/components/sfr_box/test_init.py
@@ -0,0 +1,50 @@
+"""Test the SFR Box setup process."""
+from collections.abc import Generator
+from unittest.mock import patch
+
+import pytest
+from sfrbox_api.exceptions import SFRBoxError
+
+from homeassistant.components.sfr_box.const import DOMAIN
+from homeassistant.config_entries import ConfigEntry, ConfigEntryState
+from homeassistant.core import HomeAssistant
+
+
+@pytest.fixture(autouse=True)
+def override_platforms() -> Generator[None, None, None]:
+    """Override PLATFORMS."""
+    with patch("homeassistant.components.sfr_box.PLATFORMS", []):
+        yield
+
+
+@pytest.mark.usefixtures("system_get_info", "dsl_get_info")
+async def test_setup_unload_entry(
+    hass: HomeAssistant, config_entry: ConfigEntry
+) -> None:
+    """Test entry setup and unload."""
+    await hass.config_entries.async_setup(config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert len(hass.config_entries.async_entries(DOMAIN)) == 1
+    assert config_entry.state is ConfigEntryState.LOADED
+
+    # Unload the entry and verify that the data has been removed
+    await hass.config_entries.async_unload(config_entry.entry_id)
+    await hass.async_block_till_done()
+    assert config_entry.state is ConfigEntryState.NOT_LOADED
+
+
+async def test_setup_entry_exception(
+    hass: HomeAssistant, config_entry: ConfigEntry
+) -> None:
+    """Test ConfigEntryNotReady when API raises an exception during entry setup."""
+    with patch(
+        "homeassistant.components.sfr_box.coordinator.SFRBox.system_get_info",
+        side_effect=SFRBoxError,
+    ):
+        await hass.config_entries.async_setup(config_entry.entry_id)
+        await hass.async_block_till_done()
+
+    assert len(hass.config_entries.async_entries(DOMAIN)) == 1
+    assert config_entry.state is ConfigEntryState.SETUP_RETRY
+    assert not hass.data.get(DOMAIN)