diff --git a/packages/typespec-python/test/generic_mock_api_tests/asynctests/test_typetest_property_additionalproperties_async.py b/packages/typespec-python/test/generic_mock_api_tests/asynctests/test_typetest_property_additionalproperties_async.py
index 3967a2fadc..3159b69164 100644
--- a/packages/typespec-python/test/generic_mock_api_tests/asynctests/test_typetest_property_additionalproperties_async.py
+++ b/packages/typespec-python/test/generic_mock_api_tests/asynctests/test_typetest_property_additionalproperties_async.py
@@ -343,3 +343,10 @@ async def test_spread_string(client: AdditionalPropertiesClient):
     body = {"name": "SpreadSpringRecord", "prop": "abc"}
     assert await client.spread_string.get() == body
     await client.spread_string.put(body)
+
+
+@pytest.mark.asyncio
+async def test_spread_float(client: AdditionalPropertiesClient):
+    body = {"id": 43.125, "prop": 43.125}
+    assert await client.spread_float.get() == body
+    await client.spread_float.put(body)
diff --git a/packages/typespec-python/test/generic_mock_api_tests/test_typetest_property_additionalproperties.py b/packages/typespec-python/test/generic_mock_api_tests/test_typetest_property_additionalproperties.py
index 31edad2f8d..6fb23f1e52 100644
--- a/packages/typespec-python/test/generic_mock_api_tests/test_typetest_property_additionalproperties.py
+++ b/packages/typespec-python/test/generic_mock_api_tests/test_typetest_property_additionalproperties.py
@@ -305,3 +305,9 @@ def test_spread_string(client: AdditionalPropertiesClient):
     body = {"name": "SpreadSpringRecord", "prop": "abc"}
     assert client.spread_string.get() == body
     client.spread_string.put(body)
+
+
+def test_spread_float(client: AdditionalPropertiesClient):
+    body = {"id": 43.125, "prop": 43.125}
+    assert client.spread_float.get() == body
+    client.spread_float.put(body)