diff --git a/fix2038.patch b/fix2038.patch
new file mode 100644
index 0000000..3d99cf6
--- /dev/null
+++ b/fix2038.patch
@@ -0,0 +1,17 @@
+Author: Bernhard M. Wiedemann <bwiedemann suse de>
+Date: 2023-01-14
+Subject: Fix tests of python-aiosmtplib after 2038
+
+diff --git a/trustme/__init__.py b/trustme/__init__.py
+index cc280b0..f24e100 100644
+--- a/trustme/__init__.py
++++ b/trustme/__init__.py
+@@ -50,7 +50,7 @@ _KEY_SIZE = 2048
+ # Some versions of cryptography on 32-bit platforms fail if you give
+ # them dates after ~2038-01-19:
+ #   https://github.com/pyca/cryptography/pull/4658
+-DEFAULT_EXPIRY = datetime.datetime(2038, 1, 1)
++DEFAULT_EXPIRY = datetime.datetime(2098, 1, 1)
+ 
+ def _name(name, organization_name=None, common_name=None):
+     # type: (Text, Optional[Text], Optional[Text]) -> x509.Name
diff --git a/python-trustme.changes b/python-trustme.changes
index 6fd2550..0c9a86f 100644
--- a/python-trustme.changes
+++ b/python-trustme.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sat Jan 14 10:45:50 UTC 2023 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Add fix2038.patch to allow tests of python-aiosmtplib to pass after 2038
+
 -------------------------------------------------------------------
 Mon Aug 30 14:18:19 UTC 2021 - John Paul Adrian Glaubitz <adrian.glaubitz@suse.com>
 
diff --git a/python-trustme.spec b/python-trustme.spec
index e8912d5..16937e4 100644
--- a/python-trustme.spec
+++ b/python-trustme.spec
@@ -25,6 +25,7 @@ Summary:        Fake CA provider for Python tests
 License:        Apache-2.0 OR MIT
 URL:            https://github.com/python-trio/trustme
 Source:         https://files.pythonhosted.org/packages/source/t/trustme/trustme-%{version}.tar.gz
+Patch0:         fix2038.patch
 BuildRequires:  %{python_module cryptography}
 BuildRequires:  %{python_module idna}
 BuildRequires:  %{python_module pyOpenSSL}
@@ -54,6 +55,7 @@ circle of the CA is limited to the test environment.
 
 %prep
 %setup -q -n trustme-%{version}
+%patch0 -p1
 
 %build
 %python_build