diff --git a/homeassistant/components/poolsense/config_flow.py b/homeassistant/components/poolsense/config_flow.py
index 915fa1c8d06..b40ccaddd7d 100644
--- a/homeassistant/components/poolsense/config_flow.py
+++ b/homeassistant/components/poolsense/config_flow.py
@@ -20,9 +20,6 @@ class PoolSenseConfigFlow(ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    def __init__(self) -> None:
-        """Initialize PoolSense config flow."""
-
     async def async_step_user(
         self, user_input: dict[str, Any] | None = None
     ) -> ConfigFlowResult:
diff --git a/tests/components/poolsense/__init__.py b/tests/components/poolsense/__init__.py
index ace3a6997fb..9d7ecb5eb47 100644
--- a/tests/components/poolsense/__init__.py
+++ b/tests/components/poolsense/__init__.py
@@ -1 +1,12 @@
 """Tests for the PoolSense integration."""
+
+from homeassistant.core import HomeAssistant
+
+from tests.common import MockConfigEntry
+
+
+async def setup_integration(hass: HomeAssistant, config_entry: MockConfigEntry) -> None:
+    """Fixture for setting up the component."""
+    config_entry.add_to_hass(hass)
+
+    await hass.config_entries.async_setup(config_entry.entry_id)
diff --git a/tests/components/poolsense/conftest.py b/tests/components/poolsense/conftest.py
new file mode 100644
index 00000000000..d188eaef1ca
--- /dev/null
+++ b/tests/components/poolsense/conftest.py
@@ -0,0 +1,53 @@
+"""Common fixtures for the Poolsense tests."""
+
+from collections.abc import Generator
+from unittest.mock import AsyncMock, patch
+
+import pytest
+
+from homeassistant.components.poolsense.const import DOMAIN
+from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
+
+from tests.common import MockConfigEntry
+
+
+@pytest.fixture
+def mock_setup_entry() -> Generator[AsyncMock, None, None]:
+    """Override async_setup_entry."""
+    with patch(
+        "homeassistant.components.poolsense.async_setup_entry",
+        return_value=True,
+    ) as mock_setup_entry:
+        yield mock_setup_entry
+
+
+@pytest.fixture
+def mock_poolsense_client() -> Generator[AsyncMock, None, None]:
+    """Mock a PoolSense client."""
+    with (
+        patch(
+            "homeassistant.components.poolsense.PoolSense",
+            autospec=True,
+        ) as mock_client,
+        patch(
+            "homeassistant.components.poolsense.config_flow.PoolSense",
+            new=mock_client,
+        ),
+    ):
+        client = mock_client.return_value
+        client.test_poolsense_credentials.return_value = True
+        yield client
+
+
+@pytest.fixture
+def mock_config_entry() -> MockConfigEntry:
+    """Mock a config entry."""
+    return MockConfigEntry(
+        domain=DOMAIN,
+        title="test@test.com",
+        unique_id="test@test.com",
+        data={
+            CONF_EMAIL: "test@test.com",
+            CONF_PASSWORD: "test",
+        },
+    )
diff --git a/tests/components/poolsense/test_config_flow.py b/tests/components/poolsense/test_config_flow.py
index 49f790b5075..5c8b824bfaa 100644
--- a/tests/components/poolsense/test_config_flow.py
+++ b/tests/components/poolsense/test_config_flow.py
@@ -1,6 +1,6 @@
 """Test the PoolSense config flow."""
 
-from unittest.mock import patch
+from unittest.mock import AsyncMock
 
 from homeassistant.components.poolsense.const import DOMAIN
 from homeassistant.config_entries import SOURCE_USER
@@ -8,9 +8,13 @@ from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
 from homeassistant.core import HomeAssistant
 from homeassistant.data_entry_flow import FlowResultType
 
+from tests.common import MockConfigEntry
 
-async def test_show_form(hass: HomeAssistant) -> None:
-    """Test that the form is served with no input."""
+
+async def test_full_form(
+    hass: HomeAssistant, mock_setup_entry: AsyncMock, mock_poolsense_client: AsyncMock
+) -> None:
+    """Test full flow."""
     result = await hass.config_entries.flow.async_init(
         DOMAIN, context={"source": SOURCE_USER}
     )
@@ -18,39 +22,59 @@ async def test_show_form(hass: HomeAssistant) -> None:
     assert result["type"] is FlowResultType.FORM
     assert result["step_id"] == "user"
 
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input={CONF_EMAIL: "test@test.com", CONF_PASSWORD: "test"},
+    )
 
-async def test_invalid_credentials(hass: HomeAssistant) -> None:
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert result["title"] == "test@test.com"
+    assert result["data"] == {
+        CONF_EMAIL: "test@test.com",
+        CONF_PASSWORD: "test",
+    }
+    assert result["result"].unique_id == "test@test.com"
+
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
+async def test_invalid_credentials(
+    hass: HomeAssistant, mock_setup_entry: AsyncMock, mock_poolsense_client: AsyncMock
+) -> None:
     """Test we handle invalid credentials."""
-    with patch(
-        "poolsense.PoolSense.test_poolsense_credentials",
-        return_value=False,
-    ):
-        result = await hass.config_entries.flow.async_init(
-            DOMAIN,
-            context={"source": SOURCE_USER},
-            data={CONF_EMAIL: "test-email", CONF_PASSWORD: "test-password"},
-        )
+    mock_poolsense_client.test_poolsense_credentials.return_value = False
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={"source": SOURCE_USER},
+        data={CONF_EMAIL: "test@test.com", CONF_PASSWORD: "test"},
+    )
 
     assert result["type"] is FlowResultType.FORM
     assert result["errors"] == {"base": "invalid_auth"}
 
+    mock_poolsense_client.test_poolsense_credentials.return_value = True
 
-async def test_valid_credentials(hass: HomeAssistant) -> None:
-    """Test we handle invalid credentials."""
-    with (
-        patch("poolsense.PoolSense.test_poolsense_credentials", return_value=True),
-        patch(
-            "homeassistant.components.poolsense.async_setup_entry", return_value=True
-        ) as mock_setup_entry,
-    ):
-        result = await hass.config_entries.flow.async_init(
-            DOMAIN,
-            context={"source": SOURCE_USER},
-            data={CONF_EMAIL: "test-email", CONF_PASSWORD: "test-password"},
-        )
-        await hass.async_block_till_done()
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input={CONF_EMAIL: "test@test.com", CONF_PASSWORD: "test"},
+    )
 
     assert result["type"] is FlowResultType.CREATE_ENTRY
-    assert result["title"] == "test-email"
 
-    assert len(mock_setup_entry.mock_calls) == 1
+
+async def test_duplicate_entry(
+    hass: HomeAssistant,
+    mock_poolsense_client: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test we can't add the same entry twice."""
+    mock_config_entry.add_to_hass(hass)
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={"source": SOURCE_USER},
+        data={CONF_EMAIL: "test@test.com", CONF_PASSWORD: "test"},
+    )
+    await hass.async_block_till_done()
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "already_configured"