diff --git a/testing/test_config.py b/testing/test_config.py
index 3cad6d587c4..b10354da282 100644
--- a/testing/test_config.py
+++ b/testing/test_config.py
@@ -843,3 +843,10 @@ def test_with_existing_file_in_subdir(self, tmpdir):
             rootdir, inifile, inicfg = determine_setup(None, ['a/exist'])
             assert rootdir == tmpdir
             assert inifile is None
+
+    def test_addopts_before_initini(self, testdir, tmpdir, monkeypatch):
+        monkeypatch.setenv('PYTEST_ADDOPTS', '-o cache_dir=/somewhere')
+        from _pytest.config import get_config
+        config = get_config()
+        config._preparse([], addopts=True)
+        assert config._override_ini == [['cache_dir=/somewhere']]