diff --git a/pkgs/by-name/bo/borgmatic/package.nix b/pkgs/by-name/bo/borgmatic/package.nix
index 917f17302cd0..31ad075a0345 100644
--- a/pkgs/by-name/bo/borgmatic/package.nix
+++ b/pkgs/by-name/bo/borgmatic/package.nix
@@ -15,12 +15,12 @@
 }:
 python3Packages.buildPythonApplication rec {
   pname = "borgmatic";
-  version = "2.1.3";
+  version = "2.1.5";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-mWZQBoQUd+cwOV3QU62XyTCFdFpnBz2BsyImzVAozJE=";
+    hash = "sha256-T0+E6opyfr7zxfP44OlNuhqsdQyi7OdIXiE5r310LaU=";
   };
 
   passthru.updateScript = nix-update-script { };
@@ -31,13 +31,19 @@ python3Packages.buildPythonApplication rec {
       flexmock
       pytestCheckHook
       pytest-cov-stub
+      pytest-timeout
     ]
     ++ optional-dependencies.apprise;
 
   # - test_borgmatic_version_matches_news_version
-  # The file NEWS not available on the pypi source, and this test is useless
+  #   NEWS file not available on the pypi source
+  # - test_log_outputs_includes_error_output_in_exception
+  #   TOCTOU race in log_outputs(): process.poll() returns None in
+  #   raise_for_process_errors but non-None in the while-loop exit check,
+  #   so the error is never raised. Timing-dependent; fails on x86_64-darwin.
   disabledTests = [
     "test_borgmatic_version_matches_news_version"
+    "test_log_outputs_includes_error_output_in_exception"
   ];
 
   nativeBuildInputs = [ installShellFiles ];