diff --git a/pkgs/shells/xonsh/default.nix b/pkgs/shells/xonsh/default.nix
index 0e2490ff4341..2bc65164d582 100644
--- a/pkgs/shells/xonsh/default.nix
+++ b/pkgs/shells/xonsh/default.nix
@@ -1,4 +1,11 @@
-{ stdenv, fetchFromGitHub, python3Packages, glibcLocales, coreutils, git }:
+{ stdenv
+, fetchFromGitHub
+, fetchpatch
+, python3Packages
+, glibcLocales
+, coreutils
+, git
+}:
 
 python3Packages.buildPythonApplication rec {
   pname = "xonsh";
@@ -12,6 +19,14 @@ python3Packages.buildPythonApplication rec {
     sha256 = "0nk6rjdkbxli510iwqspvray48kdxvbdmq1k8nxn14kqfpqzlbcv";
   };
 
+  patches = [
+    (fetchpatch {
+      name = "fix-ptk-tests.patch";
+      url = "https://github.com/xonsh/xonsh/commit/ca7acecc968dcda7dd56c1f5d5b4df349c98d734.patch";
+      sha256 = "00nhbf9wzm6r86r9zq8mnhds30w6gdhkgsx5kpl0jppiz4ll96iw";
+    })
+  ];
+
   LC_ALL = "en_US.UTF-8";
   postPatch = ''
     sed -ie "s|/bin/ls|${coreutils}/bin/ls|" tests/test_execer.py