diff --git a/pkgs/development/python-modules/eliot/default.nix b/pkgs/development/python-modules/eliot/default.nix
index f4f16726142e..02e9a45fd8fd 100644
--- a/pkgs/development/python-modules/eliot/default.nix
+++ b/pkgs/development/python-modules/eliot/default.nix
@@ -37,6 +37,11 @@ buildPythonPackage rec {
     hash = "sha256-x6zonKL6Ys1fyUjyOgVgucAN64Dt6dCzdBrxRZa+VDQ=";
   };
 
+  patches = [
+    # Upstream PR: https://github.com/itamarst/eliot/pull/520
+    ./python-3.14.patch
+  ];
+
   build-system = [ setuptools ];
 
   dependencies = [
diff --git a/pkgs/development/python-modules/eliot/python-3.14.patch b/pkgs/development/python-modules/eliot/python-3.14.patch
new file mode 100644
index 000000000000..af34f0db80f1
--- /dev/null
+++ b/pkgs/development/python-modules/eliot/python-3.14.patch
@@ -0,0 +1,23 @@
+From a5fc2936e8e13ebb73de4254234ca4d6ead15d1e Mon Sep 17 00:00:00 2001
+From: Itamar Turner-Trauring <itamar@pythonspeed.com>
+Date: Sun, 18 Jan 2026 14:15:02 -0500
+Subject: [PATCH] Pass tests for 3.14.
+
+---
+ eliot/tests/test_coroutines.py | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/eliot/tests/test_coroutines.py b/eliot/tests/test_coroutines.py
+index 39c5496c..cb2c1b13 100644
+--- a/eliot/tests/test_coroutines.py
++++ b/eliot/tests/test_coroutines.py
+@@ -34,7 +34,8 @@ def run_coroutines(*async_functions):
+     """
+     Run a coroutine until it finishes.
+     """
+-    loop = asyncio.get_event_loop()
++    loop = asyncio.new_event_loop()
++    asyncio.set_event_loop(loop)
+     futures = [asyncio.ensure_future(f()) for f in async_functions]
+ 
+     async def wait_for_futures():