diff --git a/pkgs/development/python-modules/aioimaplib/default.nix b/pkgs/development/python-modules/aioimaplib/default.nix
index 5d6205362fa5..f26dc63ec141 100644
--- a/pkgs/development/python-modules/aioimaplib/default.nix
+++ b/pkgs/development/python-modules/aioimaplib/default.nix
@@ -24,6 +24,11 @@ buildPythonPackage rec {
     hash = "sha256-njzSpKPis033eLoRKXL538ljyMOB43chslio1wodrKU=";
   };
 
+  patches = [
+    # https://github.com/iroco-co/aioimaplib/issues/125
+    ./event-loop.patch
+  ];
+
   build-system = [ poetry-core ];
 
   nativeCheckInputs = [
diff --git a/pkgs/development/python-modules/aioimaplib/event-loop.patch b/pkgs/development/python-modules/aioimaplib/event-loop.patch
new file mode 100644
index 000000000000..616efc6d9001
--- /dev/null
+++ b/pkgs/development/python-modules/aioimaplib/event-loop.patch
@@ -0,0 +1,25 @@
+diff --git a/aioimaplib/imap_testing_server.py b/aioimaplib/imap_testing_server.py
+index b303aa3..419b808 100644
+--- a/aioimaplib/imap_testing_server.py
++++ b/aioimaplib/imap_testing_server.py
+@@ -198,12 +198,18 @@ class ImapProtocol(asyncio.Protocol):
+     DEFAULT_QUOTA = 5000
+ 
+     def __init__(self, server_state, fetch_chunk_size=0, capabilities=CAPABILITIES,
+-                 loop=asyncio.get_event_loop()):
++                 loop=None):
+         self.uidvalidity = int(datetime.now().timestamp())
+         self.capabilities = capabilities
+         self.state_to_send = list()
+         self.delay_seconds = 0
+-        self.loop = loop
++        if loop is None:
++            try:
++                self.loop = asyncio.get_running_loop()
++            except RuntimeError:
++                self.loop = asyncio.new_event_loop()
++        else:
++            self.loop = loop
+         self.fetch_chunk_size = fetch_chunk_size
+         self.transport = None
+         self.server_state = server_state
\ No newline at end of file