Deprecate --strict (#7985)

Fix #7530

4 files changed, 13 insertions, 2 deletions

diff --git a/src/_pytest/config/__init__.py b/src/_pytest/config/__init__.py
index 7e486e99e..6c1d9c69a 100644
--- a/src/_pytest/config/__init__.py
+++ b/src/_pytest/config/__init__.py
@@ -1177,6 +1177,11 @@ class Config:
         self._validate_plugins()
         self._warn_about_skipped_plugins()
 
+        if self.known_args_namespace.strict:
+            self.issue_config_time_warning(
+                _pytest.deprecated.STRICT_OPTION, stacklevel=2
+            )
+
         if self.known_args_namespace.confcutdir is None and self.inipath is not None:
             confcutdir = str(self.inipath.parent)
             self.known_args_namespace.confcutdir = confcutdir
diff --git a/src/_pytest/deprecated.py b/src/_pytest/deprecated.py
index fd00fe2d6..a9a162f41 100644
--- a/src/_pytest/deprecated.py
+++ b/src/_pytest/deprecated.py
@@ -51,3 +51,7 @@ FSCOLLECTOR_GETHOOKPROXY_ISINITPATH = PytestDeprecationWarning(
     "The gethookproxy() and isinitpath() methods of FSCollector and Package are deprecated; "
     "use self.session.gethookproxy() and self.session.isinitpath() instead. "
 )
+
+STRICT_OPTION = PytestDeprecationWarning(
+    "The --strict option is deprecated, use --strict-markers instead."
+)
diff --git a/src/_pytest/main.py b/src/_pytest/main.py
index d8a208a1a..04b51ac00 100644
--- a/src/_pytest/main.py
+++ b/src/_pytest/main.py
@@ -101,11 +101,13 @@ def pytest_addoption(parser: Parser) -> None:
     )
     group._addoption(
         "--strict-markers",
-        "--strict",
         action="store_true",
         help="markers not registered in the `markers` section of the configuration file raise errors.",
     )
     group._addoption(
+        "--strict", action="store_true", help="(deprecated) alias to --strict-markers.",
+    )
+    group._addoption(
         "-c",
         metavar="file",
         type=str,
diff --git a/src/_pytest/mark/structures.py b/src/_pytest/mark/structures.py
index 6cbdf8b30..6c126cf4a 100644
--- a/src/_pytest/mark/structures.py
+++ b/src/_pytest/mark/structures.py
@@ -496,7 +496,7 @@ class MarkGenerator:
             # If the name is not in the set of known marks after updating,
             # then it really is time to issue a warning or an error.
             if name not in self._markers:
-                if self._config.option.strict_markers:
+                if self._config.option.strict_markers or self._config.option.strict:
                     fail(
                         f"{name!r} not found in `markers` configuration option",
                         pytrace=False,