diff --git a/pkgs/development/python-modules/finetuning-scheduler/default.nix b/pkgs/development/python-modules/finetuning-scheduler/default.nix
index 344e3c735659..5bef00a10bb1 100644
--- a/pkgs/development/python-modules/finetuning-scheduler/default.nix
+++ b/pkgs/development/python-modules/finetuning-scheduler/default.nix
@@ -58,23 +58,28 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
   enabledTestPaths = [ "tests" ];
-  disabledTests =
-    lib.optionals (pythonOlder "3.12") [
-      # torch._dynamo.exc.BackendCompilerFailed: backend='inductor' raised:
-      # LoweringException: ImportError: cannot import name 'triton_key' from 'triton.compiler.compiler'
-      "test_fts_dynamo_enforce_p0"
-      "test_fts_dynamo_resume"
-      "test_fts_dynamo_intrafit"
-    ]
-    ++ lib.optionals (pythonAtLeast "3.13") [
-      # RuntimeError: Dynamo is not supported on Python 3.13+
-      "test_fts_dynamo_enforce_p0"
-      "test_fts_dynamo_resume"
-    ]
-    ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) [
-      # slightly exceeds numerical tolerance on aarch64-linux:
-      "test_fts_frozen_bn_track_running_stats"
-    ];
+  disabledTests = [
+    # Fails since pytorch-lightning was bumped to 2.5.3
+    # IndexError: list index out of range
+    # https://github.com/speediedan/finetuning-scheduler/issues/19
+    "test_fts_misconfiguration"
+  ]
+  ++ lib.optionals (pythonOlder "3.12") [
+    # torch._dynamo.exc.BackendCompilerFailed: backend='inductor' raised:
+    # LoweringException: ImportError: cannot import name 'triton_key' from 'triton.compiler.compiler'
+    "test_fts_dynamo_enforce_p0"
+    "test_fts_dynamo_resume"
+    "test_fts_dynamo_intrafit"
+  ]
+  ++ lib.optionals (pythonAtLeast "3.13") [
+    # RuntimeError: Dynamo is not supported on Python 3.13+
+    "test_fts_dynamo_enforce_p0"
+    "test_fts_dynamo_resume"
+  ]
+  ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) [
+    # slightly exceeds numerical tolerance on aarch64-linux:
+    "test_fts_frozen_bn_track_running_stats"
+  ];
 
   pythonImportsCheck = [ "finetuning_scheduler" ];
 
diff --git a/pkgs/development/python-modules/pytorch-lightning/default.nix b/pkgs/development/python-modules/pytorch-lightning/default.nix
index 6a8d934b0c9d..d1c9b0fdd4c0 100644
--- a/pkgs/development/python-modules/pytorch-lightning/default.nix
+++ b/pkgs/development/python-modules/pytorch-lightning/default.nix
@@ -24,14 +24,14 @@
 
 buildPythonPackage rec {
   pname = "pytorch-lightning";
-  version = "2.5.2";
+  version = "2.5.3";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "Lightning-AI";
     repo = "pytorch-lightning";
     tag = version;
-    hash = "sha256-zYPjMahC8/9uYomzSFMbswJoh+CcBsnO0h4pkgCxIcQ=";
+    hash = "sha256-xLm8t1A6mwIyX5WCkhdt9D9/PsomkSTCAxIGBQlFGxY=";
   };
 
   preConfigure = ''