diff --git a/dev-python/trio/files/trio-0.20.0-py311.patch b/dev-python/trio/files/trio-0.20.0-py311.patch
new file mode 100644
index 0000000000000..f7d447825a16d
--- /dev/null
+++ b/dev-python/trio/files/trio-0.20.0-py311.patch
@@ -0,0 +1,26 @@
+diff --git a/trio/_core/_multierror.py b/trio/_core/_multierror.py
+index 6dfdaa7a5..de0d56d46 100644
+--- a/trio/_core/_multierror.py
++++ b/trio/_core/_multierror.py
+@@ -383,11 +383,10 @@ def traceback_exception_init(
+     capture_locals=False,
+     compact=False,
+     _seen=None,
++    **kwargs,
+ ):
+     if sys.version_info >= (3, 10):
+-        kwargs = {"compact": compact}
+-    else:
+-        kwargs = {}
++        kwargs["compact"] = compact
+ 
+     # Capture the original exception and its cause and context as TracebackExceptions
+     traceback_exception_original_init(
+@@ -421,6 +420,7 @@ def traceback_exception_init(
+                         # copy the set of _seen exceptions so that duplicates
+                         # shared between sub-exceptions are not omitted
+                         _seen=None if seen_was_none else set(_seen),
++                        **kwargs,
+                     )
+                 )
+         self.embedded = embedded
diff --git a/dev-python/trio/trio-0.20.0.ebuild b/dev-python/trio/trio-0.20.0.ebuild
index 721a7b11a297c..10ace0d680905 100644
--- a/dev-python/trio/trio-0.20.0.ebuild
+++ b/dev-python/trio/trio-0.20.0.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-PYTHON_COMPAT=( pypy3 python3_{8..10} )
+PYTHON_COMPAT=( pypy3 python3_{8..11} )
 DISTUTILS_USE_PEP517=setuptools
 
 inherit distutils-r1
@@ -38,19 +38,8 @@ BDEPEND="
 	)
 "
 
-EPYTEST_DESELECT=(
-	# Times out on slower arches (ia64 in this case)
-	# https://github.com/python-trio/trio/issues/1753
-	trio/tests/test_unix_pipes.py::test_close_at_bad_time_for_send_all
-
-	# incompatible ipython version?
-	trio/_core/tests/test_multierror.py::test_ipython_exc_handler
-)
-
-EPYTEST_IGNORE=(
-	# these tests require internet access
-	trio/tests/test_ssl.py
-	trio/tests/test_highlevel_ssl_helpers.py
+PATCHES=(
+	"${FILESDIR}/${P}-py311.patch"
 )
 
 distutils_enable_tests pytest
@@ -61,6 +50,26 @@ distutils_enable_sphinx docs/source \
 	dev-python/towncrier
 
 python_test() {
+	local EPYTEST_IGNORE=(
+		# these tests require internet access
+		trio/tests/test_ssl.py
+		trio/tests/test_highlevel_ssl_helpers.py
+	)
+
+	local EPYTEST_DESELECT=(
+		# Times out on slower arches (ia64 in this case)
+		# https://github.com/python-trio/trio/issues/1753
+		trio/tests/test_unix_pipes.py::test_close_at_bad_time_for_send_all
+
+		# incompatible ipython version?
+		trio/_core/tests/test_multierror.py::test_ipython_exc_handler
+	)
+
+	[[ ${EPYTHON} == python3.11 ]] && EPYTEST_DESELECT+=(
+		# test for functionality that has been removed from py3.11
+		trio/tests/test_util.py::test_coroutine_or_error
+	)
+
 	local -x PYTEST_DISABLE_PLUGIN_AUTOLOAD=1
 	epytest -m "not redistributors_should_skip"
 }