diff --git a/readthedocs/rtd_tests/tests/test_config_integration.py b/readthedocs/rtd_tests/tests/test_config_integration.py
index f536a3d7e9b..42a5951cf42 100644
--- a/readthedocs/rtd_tests/tests/test_config_integration.py
+++ b/readthedocs/rtd_tests/tests/test_config_integration.py
@@ -81,7 +81,7 @@ def test_python_supported_versions_default_image_1_0(self, load_config):
                         ],
                         'use_system_packages': self.project.use_system_packages,
                         'requirements_file': self.project.requirements_file,
-                        'python_version': 2,
+                        'python_version': 3,
                         'sphinx_configuration': mock.ANY,
                         'build_image': 'readthedocs/build:1.0',
                         'doctype': self.project.documentation_type,