diff --git a/.meta.toml b/.meta.toml
index 622f4f8812..9ed56976d7 100644
--- a/.meta.toml
+++ b/.meta.toml
@@ -43,7 +43,9 @@ testenv-commands-pre = [
     "{envbindir}/buildout -c {toxinidir}/buildout.cfg buildout:directory={envdir} buildout:develop={toxinidir} install alltests",
     ]
 testenv-commands = [
-    "{envdir}/bin/alltests {posargs:-vc}",
+    "# the `layer` argument below suppresses a `ZCatalog` performance test",
+    "# which occasionally fails on GITHUB",
+    "{envdir}/bin/alltests --layer '!Products.PluginIndexes' {posargs:-vc}",
     ]
 coverage-basepython = "python3.8"
 coverage-command = "coverage run {envdir}/bin/alltests {posargs:-vc}"
diff --git a/CHANGES.rst b/CHANGES.rst
index fd3aee3023..d5eb07e790 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -10,10 +10,27 @@ https://github.com/zopefoundation/Zope/blob/4.x/CHANGES.rst
 5.8.4 (unreleased)
 ------------------
 
+- Disable a ``ZCatalog`` (more precisly: ``Products.PluginIndexes``)
+  performance test which occasionally fails on GITHUB.
+  For details, see
+  `#1136 <https://github.com/zopefoundation/Zope/issues/1136>`_.
+
+- Restore filename on code objects of objects returned from
+  ``App.Extensions.getObject()``. This got lost in 4.0a6.
+
 - Update to newest compatible versions of dependencies.
 
 - Add preliminary support for Python 3.12b2.
 
+- Make ``mapply`` ``__signature__`` aware.
+  This allows to publish methods decorated via a decorator
+  which sets ``__signature__`` on the wrapper to specify
+  the signature to use.
+  For details, see
+  `#1134 <https://github.com/zopefoundation/Zope/issues/1134>`_.
+  Note: ``mapply`` still does not support keyword only, var positional
+  and var keyword parameters.
+
 
 5.8.3 (2023-06-15)
 ------------------
diff --git a/src/App/Extensions.py b/src/App/Extensions.py
index a13c9d5c0f..dce6b121d6 100644
--- a/src/App/Extensions.py
+++ b/src/App/Extensions.py
@@ -180,8 +180,9 @@ def getObject(module, name, reload=0):
     except Exception:
         raise NotFound("The specified module, '%s', "
                        "couldn't be opened." % module)
+    execcode = compile(execsrc, path, 'exec')
     module_dict = {}
-    exec(execsrc, module_dict)
+    exec(execcode, module_dict)
 
     if old is not None:
         # XXX Accretive??
diff --git a/src/App/tests/fixtures/error.py b/src/App/tests/fixtures/error.py
new file mode 100644
index 0000000000..81fa728910
--- /dev/null
+++ b/src/App/tests/fixtures/error.py
@@ -0,0 +1,2 @@
+# This file intentionally contains a SyntaxError
+a =  # noqa
diff --git a/src/App/tests/fixtures/getObject.py b/src/App/tests/fixtures/getObject.py
new file mode 100644
index 0000000000..2ee5467cd2
--- /dev/null
+++ b/src/App/tests/fixtures/getObject.py
@@ -0,0 +1,5 @@
+import sys
+
+
+def f1():
+    return sys._getframe(0).f_code.co_filename
diff --git a/src/App/tests/test_Extensions.py b/src/App/tests/test_Extensions.py
new file mode 100644
index 0000000000..30d6271027
--- /dev/null
+++ b/src/App/tests/test_Extensions.py
@@ -0,0 +1,38 @@
+import types
+import unittest
+from pathlib import Path
+
+import App.config
+from App.Extensions import getObject
+
+
+class GetObjectTests(unittest.TestCase):
+    """Testing ..Extensions.getObject()."""
+
+    def setUp(self):
+        cfg = App.config.getConfiguration()
+        assert not hasattr(cfg, 'extensions')
+        cfg.extensions = Path(__file__).parent / 'fixtures'
+
+    def tearDown(self):
+        cfg = App.config.getConfiguration()
+        del cfg.extensions
+
+    def test_Extensions__getObject__1(self):
+        """Check that "getObject" returns the requested function and ...
+
+        that its code object has the path set.
+        """
+        obj = getObject('getObject', 'f1')
+        self.assertIsInstance(obj, types.FunctionType)
+        self.assertEqual(obj.__name__, 'f1')
+        path = obj()
+        self.assertTrue(
+            path.endswith(str(Path('App/tests/fixtures/getObject.py'))))
+
+    def test_Extensions__getObject__2(self):
+        """It raises a SyntaxError if necessary."""
+        try:
+            getObject('error', 'f1')
+        except SyntaxError as e:
+            self.assertEqual(str(e), 'invalid syntax (error.py, line 2)')
diff --git a/src/ZPublisher/mapply.py b/src/ZPublisher/mapply.py
index 19deeacf4d..d2259adcee 100644
--- a/src/ZPublisher/mapply.py
+++ b/src/ZPublisher/mapply.py
@@ -12,6 +12,8 @@
 ##############################################################################
 """Provide an apply-like facility that works with any mapping object
 """
+from inspect import getfullargspec
+
 import zope.publisher.publish
 
 
@@ -50,9 +52,20 @@ def mapply(object, positional=(), keyword={},
             if maybe:
                 return object
             raise
-        code = f.__code__
-        defaults = f.__defaults__
-        names = code.co_varnames[count:code.co_argcount]
+        if hasattr(f, "__signature__"):
+            # The function has specified the signature to use
+            # (likely via a decorator)
+            # We use ``getfullargspec`` because it packages
+            # the signature information in the way we need it here.
+            # Should the function get deprecated, we could do the
+            # packaging ourselves
+            argspec = getfullargspec(f)
+            defaults = argspec.defaults
+            names = argspec.args[count:]
+        else:
+            code = f.__code__
+            defaults = f.__defaults__
+            names = code.co_varnames[count:code.co_argcount]
 
     nargs = len(names)
     if positional:
diff --git a/src/ZPublisher/tests/test_mapply.py b/src/ZPublisher/tests/test_mapply.py
index d0cc4eee3c..590df65db5 100644
--- a/src/ZPublisher/tests/test_mapply.py
+++ b/src/ZPublisher/tests/test_mapply.py
@@ -90,3 +90,17 @@ class NoCallButAcquisition(Acquisition.Implicit):
 
         ob = NoCallButAcquisition().__of__(Root())
         self.assertRaises(TypeError, mapply, ob, (), {})
+
+    def testFunctionWithSignature(self):
+        from inspect import Parameter
+        from inspect import Signature
+
+        def f(*args, **kw):
+            return args, kw
+
+        f.__signature__ = Signature(
+            (Parameter("a", Parameter.POSITIONAL_OR_KEYWORD),
+             Parameter("b", Parameter.POSITIONAL_OR_KEYWORD, default="b")))
+
+        self.assertEqual(mapply(f, ("a",), {}), (("a", "b"), {}))
+        self.assertEqual(mapply(f, (), {"a": "A", "b": "B"}), (("A", "B"), {}))
diff --git a/tox.ini b/tox.ini
index 9e17b220e8..4ea086edb0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,7 +26,9 @@ setenv =
 commands_pre =
     {envbindir}/buildout -c {toxinidir}/buildout.cfg buildout:directory={envdir} buildout:develop={toxinidir} install alltests
 commands =
-    {envdir}/bin/alltests {posargs:-vc}
+    # the `layer` argument below suppresses a `ZCatalog` performance test
+    # which occasionally fails on GITHUB
+    {envdir}/bin/alltests --layer '!Products.PluginIndexes' {posargs:-vc}
 
 [testenv:pre-commit]
 basepython = python3