Use raw Python and raw TOML strings in filterwarnings

doc/en/how-to/capture-warnings.rst

@@ -91,9 +91,9 @@ all other warnings into errors.
 
         [pytest]
         filterwarnings = [
-            "error",
-            "ignore::UserWarning",
-            # note the use of single quote below to denote "raw" strings in TOML
+            'error',
+            'ignore::UserWarning',
+            # Note the use of single quote below to denote "raw" strings in TOML.
             'ignore:function ham\(\) is deprecated:DeprecationWarning',
         ]
 

doc/en/reference/reference.rst

@@ -186,7 +186,7 @@ Add warning filters to marked test items.
 
         .. code-block:: python
 
-            @pytest.mark.filterwarnings("ignore:.*usage will be deprecated.*:DeprecationWarning")
+            @pytest.mark.filterwarnings(r"ignore:.*usage will be deprecated.*:DeprecationWarning")
             def test_foo(): ...
 
 
@@ -1587,9 +1587,8 @@ passed multiple times. The expected format is ``name=value``. For example::
    For more information please refer to :ref:`faulthandler`.
    For more information please refer to :ref:`faulthandler`.
 
-.. confval:: filterwarnings
-
 
+.. confval:: filterwarnings
 
    Sets a list of filters and actions that should be taken for matched
    warnings. By default all warnings emitted during the test session
@@ -1600,7 +1599,12 @@ passed multiple times. The expected format is ``name=value``. For example::
        .. code-block:: toml
 
             [pytest]
-            filterwarnings = ["error", "ignore::DeprecationWarning"]
+            filterwarnings = [
+                'error',
+                'ignore::DeprecationWarning',
+                # Note the use of single quote below to denote "raw" strings in TOML.
+                'ignore:function ham\(\) should not be used:UserWarning',
+            ]
 
    .. tab:: ini
 
@@ -1610,6 +1614,7 @@ passed multiple times. The expected format is ``name=value``. For example::
             filterwarnings =
                 error
                 ignore::DeprecationWarning
+                ignore:function ham\(\) should not be used:UserWarning
 
    This tells pytest to ignore deprecation warnings and turn all other warnings
    into errors. For more information please refer to :ref:`warnings`.

pyproject.toml

@@ -380,39 +380,39 @@ norecursedirs = [
 ]
 strict = true
 filterwarnings = [
-    "error",
-    "default:Using or importing the ABCs:DeprecationWarning:unittest2.*",
+    'error',
+    'default:Using or importing the ABCs:DeprecationWarning:unittest2.*',
     # produced by older pyparsing<=2.2.0.
-    "default:Using or importing the ABCs:DeprecationWarning:pyparsing.*",
-    "default:the imp module is deprecated in favour of importlib:DeprecationWarning:nose.*",
+    'default:Using or importing the ABCs:DeprecationWarning:pyparsing.*',
+    'default:the imp module is deprecated in favour of importlib:DeprecationWarning:nose.*',
     # distutils is deprecated in 3.10, scheduled for removal in 3.12
-    "ignore:The distutils package is deprecated:DeprecationWarning",
+    'ignore:The distutils package is deprecated:DeprecationWarning',
     # produced by pytest-xdist
-    "ignore:.*type argument to addoption.*:DeprecationWarning",
+    'ignore:.*type argument to addoption.*:DeprecationWarning',
     # produced on execnet (pytest-xdist)
-    "ignore:.*inspect.getargspec.*deprecated, use inspect.signature.*:DeprecationWarning",
+    'ignore:.*inspect.getargspec.*deprecated, use inspect.signature.*:DeprecationWarning',
     # pytest's own futurewarnings
-    "ignore::pytest.PytestExperimentalApiWarning",
+    'ignore::pytest.PytestExperimentalApiWarning',
     # Do not cause SyntaxError for invalid escape sequences in py37.
     # Those are caught/handled by pyupgrade, and not easy to filter with the
     # module being the filename (with .py removed).
-    "default:invalid escape sequence:DeprecationWarning",
+    'default:invalid escape sequence:DeprecationWarning',
     # ignore not yet fixed warnings for hook markers
-    "default:.*not marked using pytest.hook.*",
-    "ignore:.*not marked using pytest.hook.*::xdist.*",
+    'default:.*not marked using pytest.hook.*',
+    'ignore:.*not marked using pytest.hook.*::xdist.*',
     # ignore use of unregistered marks, because we use many to test the implementation
-    "ignore::_pytest.warning_types.PytestUnknownMarkWarning",
+    'ignore::_pytest.warning_types.PytestUnknownMarkWarning',
     # https://github.com/benjaminp/six/issues/341
-    "ignore:_SixMetaPathImporter\\.exec_module\\(\\) not found; falling back to load_module\\(\\):ImportWarning",
+    'ignore:_SixMetaPathImporter\.exec_module\(\) not found; falling back to load_module\(\):ImportWarning',
     # https://github.com/benjaminp/six/pull/352
-    "ignore:_SixMetaPathImporter\\.find_spec\\(\\) not found; falling back to find_module\\(\\):ImportWarning",
+    'ignore:_SixMetaPathImporter\.find_spec\(\) not found; falling back to find_module\(\):ImportWarning',
     # https://github.com/pypa/setuptools/pull/2517
-    "ignore:VendorImporter\\.find_spec\\(\\) not found; falling back to find_module\\(\\):ImportWarning",
+    'ignore:VendorImporter\.find_spec\(\) not found; falling back to find_module\(\):ImportWarning',
     # https://github.com/pytest-dev/execnet/pull/127
-    "ignore:isSet\\(\\) is deprecated, use is_set\\(\\) instead:DeprecationWarning",
+    'ignore:isSet\(\) is deprecated, use is_set\(\) instead:DeprecationWarning',
     # https://github.com/pytest-dev/pytest/issues/2366
     # https://github.com/pytest-dev/pytest/pull/13057
-    "default::pytest.PytestFDWarning",
+    'default::pytest.PytestFDWarning',
 ]
 pytester_example_dir = "testing/example_scripts"
 markers = [