diff --git a/pyproject.toml b/pyproject.toml
index 98f7b08d..3a957134 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -120,5 +120,5 @@ paths = ["omnikinverter"]
 verbose = true
 
 [build-system]
-requires = ["poetry-core>=1.0.0"]
+requires = ["setuptools","poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
diff --git a/tests/test_omnik.py b/tests/test_omnik.py
index 72f1985f..c4551fc0 100644
--- a/tests/test_omnik.py
+++ b/tests/test_omnik.py
@@ -15,6 +15,42 @@
 from . import load_fixtures
 
 
+@pytest.mark.asyncio
+async def test_json_request(aresponses):
+    """Test JSON response is handled correctly."""
+    aresponses.add(
+        "example.com",
+        "/test",
+        "GET",
+        aresponses.Response(
+            status=200,
+            headers={"Content-Type": "application/json"},
+            text='{"status": "ok"}',
+        ),
+    )
+    async with aiohttp.ClientSession() as session:
+        omnik_inverter = OmnikInverter("example.com", session=session)
+        await omnik_inverter.request("test")
+        await omnik_inverter.close()
+
+
+@pytest.mark.asyncio
+async def test_internal_session(aresponses):
+    """Test JSON response is handled correctly."""
+    aresponses.add(
+        "example.com",
+        "/test",
+        "GET",
+        aresponses.Response(
+            status=200,
+            headers={"Content-Type": "application/json"},
+            text='{"status": "ok"}',
+        ),
+    )
+    async with OmnikInverter("example.com") as omnik_inverter:
+        await omnik_inverter.request("test")
+
+
 @pytest.mark.asyncio
 async def test_wrong_js_source(aresponses):
     """Test on wrong data source error raise."""