diff --git a/pandas/tests/series/test_repr.py b/pandas/tests/series/test_repr.py
index 96a69476ccbef..0d5c3bc21c609 100644
--- a/pandas/tests/series/test_repr.py
+++ b/pandas/tests/series/test_repr.py
@@ -240,6 +240,13 @@ def test_series_repr_nat(self):
         )
         assert result == expected
 
+    def test_float_repr(self):
+        # GH#35603
+        # check float format when cast to object
+        ser = Series([1.0]).astype(object)
+        expected = "0    1.0\ndtype: object"
+        assert repr(ser) == expected
+
 
 class TestCategoricalRepr:
     def test_categorical_repr_unicode(self):