diff --git a/src/python_tests_runner/PythonTestRunner.cs b/src/python_tests_runner/PythonTestRunner.cs
@@ -35,6 +35,7 @@ static IEnumerable<string[]> PythonTestCases()
            // Add the test that you want to debug here.
            yield return new[] { "test_indexer", "test_boolean_indexer" };
            yield return new[] { "test_delegate", "test_bool_delegate" };
        }

        /// <summary>

diff --git a/src/runtime/PythonTypes/PyInt.cs b/src/runtime/PythonTypes/PyInt.cs
@@ -228,7 +228,8 @@ public BigInteger ToBigInteger()
        public string ToString(string format, IFormatProvider formatProvider)
        {
            using var _ = Py.GIL();
-            return ToBigInteger().ToString(format, formatProvider);
        }

        public override TypeCode GetTypeCode() => TypeCode.Int64;

diff --git a/tests/test_conversion.py b/tests/test_conversion.py
@@ -752,3 +752,9 @@ def test_explicit_conversion():
        assert int(t(123.4)) == 123
        with pytest.raises(TypeError):
            index(t(123.4))
diff --git a/tests/test_delegate.py b/tests/test_delegate.py
@@ -451,3 +451,6 @@ def wrong_return_type(intValue, stringValue):
    # test sig mismatch, both on managed and Python side

    # test return wrong type
Original file line number	Diff line number	Diff line change
Expand Up		@@ -752,3 +752,9 @@ def test_explicit_conversion():
		assert int(t(123.4)) == 123
		with pytest.raises(TypeError):
		index(t(123.4))
Original file line number	Diff line number	Diff line change
Expand Up		@@ -451,3 +451,6 @@ def wrong_return_type(intValue, stringValue):
		# test sig mismatch, both on managed and Python side

		# test return wrong type