diff --git a/AUTHORS b/AUTHORS
index f2f419cf642..620ed218886 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -373,6 +373,7 @@ Piotr Banaszkiewicz
 Piotr Helm
 Poulami Sau
 Prakhar Gurunani
+Praneeth Kodumagulla
 Prashant Anand
 Prashant Sharma
 Pulkit Goyal
diff --git a/changelog/14442.bugfix.rst b/changelog/14442.bugfix.rst
new file mode 100644
index 00000000000..90999cc9572
--- /dev/null
+++ b/changelog/14442.bugfix.rst
@@ -0,0 +1,3 @@
+Fixed a regression in pytest 9.0 where :option:`--strict-markers` and :option:`--strict-config` specified through :confval:`addopts` were silently ignored.
+
+Note that when targeting pytest >= 9.0, it's nicer to use :confval:`strict_markers` and :confval:`strict_config`, or :ref:`strict mode <strict mode>`.
diff --git a/src/_pytest/config/__init__.py b/src/_pytest/config/__init__.py
index 4cd8d317f6e..67d9a0aa111 100644
--- a/src/_pytest/config/__init__.py
+++ b/src/_pytest/config/__init__.py
@@ -50,6 +50,7 @@
 from .exceptions import UsageError as UsageError
 from .findpaths import ConfigValue
 from .findpaths import determine_setup
+from .findpaths import parse_override_ini
 from _pytest import __version__
 import _pytest._code
 from _pytest._code import ExceptionInfo
@@ -1535,6 +1536,12 @@ def parse(self, args: list[str], addopts: bool = True) -> None:
         self.known_args_namespace = self._parser.parse_known_args(
             args, namespace=copy.copy(self.option)
         )
+        if addopts:
+            # addopts may have added overrides (especially via OverrideIniAction).
+            # The thing can be endlessly circular but we only do one level (#14442).
+            if overrides := parse_override_ini(self.known_args_namespace.override_ini):
+                self._inicfg.update(overrides)
+                self._inicache.clear()
         self._checkversion()
         self._consider_importhook()
         self._configure_python_path()
diff --git a/testing/test_config.py b/testing/test_config.py
index f086778ad1e..4496e94d0f4 100644
--- a/testing/test_config.py
+++ b/testing/test_config.py
@@ -459,16 +459,21 @@ def test_silence_unknown_key_warning(self, pytester: Pytester) -> None:
         result = pytester.runpytest()
         result.stdout.no_fnmatch_line("*PytestConfigWarning*")
 
-    @pytest.mark.parametrize("option_name", ["strict_config", "strict"])
-    def test_strict_config_ini_option(
-        self, pytester: Pytester, option_name: str
-    ) -> None:
+    @pytest.mark.parametrize(
+        "option",
+        [
+            "strict_config = true",
+            "strict = true",
+            "addopts = --strict-config",
+        ],
+    )
+    def test_strict_config_ini_option(self, pytester: Pytester, option: str) -> None:
         """Test that strict_config and strict ini options enable strict config checking."""
         pytester.makeini(
             f"""
             [pytest]
             unknown_option = 1
-            {option_name} = True
+            {option}
             """
         )
         result = pytester.runpytest()
diff --git a/testing/test_mark.py b/testing/test_mark.py
index 8d76ea310eb..70df03be2fd 100644
--- a/testing/test_mark.py
+++ b/testing/test_mark.py
@@ -184,11 +184,16 @@ def test_hello():
 
 
 @pytest.mark.parametrize(
-    "option_name", ["--strict-markers", "--strict", "strict_markers", "strict"]
+    "option",
+    [
+        "--strict-markers",
+        "--strict",
+        "strict_markers = true",
+        "strict = true",
+        "addopts = --strict-markers",
+    ],
 )
-def test_strict_prohibits_unregistered_markers(
-    pytester: Pytester, option_name: str
-) -> None:
+def test_strict_prohibits_unregistered_markers(pytester: Pytester, option: str) -> None:
     pytester.makepyfile(
         """
         import pytest
@@ -197,16 +202,16 @@ def test_hello():
             pass
     """
     )
-    if option_name in ("strict_markers", "strict"):
+    if option.startswith("-"):
+        result = pytester.runpytest(option)
+    else:
         pytester.makeini(
             f"""
             [pytest]
-            {option_name} = true
+            {option}
             """
         )
         result = pytester.runpytest()
-    else:
-        result = pytester.runpytest(option_name)
     assert result.ret != 0
     result.stdout.fnmatch_lines(
         ["'unregisteredmark' not found in `markers` configuration option"]