diff --git a/pkgs/by-name/me/memray/package.nix b/pkgs/by-name/me/memray/package.nix
index 9c8a4a3f4c5c..cec89938e5e4 100644
--- a/pkgs/by-name/me/memray/package.nix
+++ b/pkgs/by-name/me/memray/package.nix
@@ -63,6 +63,11 @@ python3Packages.buildPythonApplication rec {
   disabledTestPaths = [
     # Very time-consuming and some tests fails (performance-related?)
     "tests/integration/test_main.py"
+
+    # AssertionError since textual was updated to 3.1.0
+    # https://github.com/bloomberg/memray/issues/750
+    "tests/unit/test_tree_reporter.py"
+    "tests/unit/test_tui_reporter.py"
   ];
 
   meta = with lib; {
diff --git a/pkgs/development/python-modules/textual-textarea/default.nix b/pkgs/development/python-modules/textual-textarea/default.nix
index 712e4e36cdcc..9e6a02bf2c00 100644
--- a/pkgs/development/python-modules/textual-textarea/default.nix
+++ b/pkgs/development/python-modules/textual-textarea/default.nix
@@ -13,6 +13,7 @@
   # tests
   pytestCheckHook,
   pytest-asyncio,
+  tree-sitter-python,
 }:
 
 buildPythonPackage rec {
@@ -46,17 +47,27 @@ buildPythonPackage rec {
   nativeCheckInputs = [
     pytestCheckHook
     pytest-asyncio
+    tree-sitter-python
   ];
 
   pythonImportsCheck = [ "textual_textarea" ];
 
-  disabledTestPaths = [
+  pytestFlagsArray = [
+    # "--deselect=tests/functional_tests/test_comments.py::test_comments[sql--- ]"
+  ];
+
+  disabledTests = [
+    # Requires unpackaged tree-sitter-sql
+    #  textual.widgets._text_area.LanguageDoesNotExist
+    "test_comments"
+
+    # AssertionError: assert Selection(sta...), end=(0, 6)) == Selection(sta...), end=(1, 0))
     # https://github.com/tconbeer/textual-textarea/issues/296
-    "tests/functional_tests/test_textarea.py"
+    "test_keys"
   ];
 
   meta = {
-    description = "A text area (multi-line input) with syntax highlighting for Textual";
+    description = "Text area (multi-line input) with syntax highlighting for Textual";
     homepage = "https://github.com/tconbeer/textual-textarea";
     changelog = "https://github.com/tconbeer/textual-textarea/releases/tag/v${version}";
     license = lib.licenses.mit;
diff --git a/pkgs/development/python-modules/textual/default.nix b/pkgs/development/python-modules/textual/default.nix
index 2dcdda0f152b..183a2dd67b7b 100644
--- a/pkgs/development/python-modules/textual/default.nix
+++ b/pkgs/development/python-modules/textual/default.nix
@@ -23,18 +23,20 @@
   pytestCheckHook,
   syrupy,
   time-machine,
+  tree-sitter-markdown,
+  tree-sitter-python,
 }:
 
 buildPythonPackage rec {
   pname = "textual";
-  version = "2.1.2";
+  version = "3.1.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "Textualize";
     repo = "textual";
     tag = "v${version}";
-    hash = "sha256-VKo1idLu5sYGtuK8yZzVE6QrrMOciYIesbGVlqzNjfk=";
+    hash = "sha256-JBqzaSsLSCzUYdIjlPZdPJlRKrqtWWPqJPp85uMcMLc=";
   };
 
   build-system = [ poetry-core ];
@@ -63,33 +65,25 @@ buildPythonPackage rec {
     syrupy
     time-machine
     tree-sitter
+    tree-sitter-markdown
+    tree-sitter-python
   ];
 
   disabledTestPaths = [
     # Snapshot tests require syrupy<4
     "tests/snapshot_tests/test_snapshots.py"
-
-    # Flaky: https://github.com/Textualize/textual/issues/5511
-    # RuntimeError: There is no current event loop in thread 'MainThread'.
-    "tests/test_focus.py"
   ];
 
   disabledTests = [
     # Assertion issues
     "test_textual_env_var"
-
-    # Requirements for tests are not quite ready
-    "test_register_language"
-
-    # Requires python bindings for tree-sitter languages
-    # https://github.com/Textualize/textual/issues/5449
-    "test_setting_unknown_language"
-    "test_update_highlight_query"
   ];
 
-  # Some tests in groups require state from previous tests
-  # See https://github.com/Textualize/textual/issues/4924#issuecomment-2304889067
-  pytestFlagsArray = [ "--dist=loadgroup" ];
+  pytestFlagsArray = [
+    # Some tests in groups require state from previous tests
+    # See https://github.com/Textualize/textual/issues/4924#issuecomment-2304889067
+    "--dist=loadgroup"
+  ];
 
   pythonImportsCheck = [ "textual" ];
 
diff --git a/pkgs/development/python-modules/tree-sitter-markdown/default.nix b/pkgs/development/python-modules/tree-sitter-markdown/default.nix
new file mode 100644
index 000000000000..394b5467a537
--- /dev/null
+++ b/pkgs/development/python-modules/tree-sitter-markdown/default.nix
@@ -0,0 +1,46 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  tree-sitter,
+  pytestCheckHook,
+}:
+
+buildPythonPackage rec {
+  pname = "tree-sitter-markdown";
+  version = "0.4.1";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "tree-sitter-grammars";
+    repo = "tree-sitter-markdown";
+    tag = "v${version}";
+    hash = "sha256-Oe2iL5b1Cyv+dK0nQYFNLCCOCe+93nojxt6ukH2lEmU=";
+  };
+
+  build-system = [
+    setuptools
+  ];
+
+  optional-dependencies = {
+    core = [
+      tree-sitter
+    ];
+  };
+
+  pythonImportsCheck = [ "tree_sitter_markdown" ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+    tree-sitter
+  ];
+
+  meta = {
+    description = "Markdown grammar for tree-sitter";
+    homepage = "https://github.com/tree-sitter-grammars/tree-sitter-markdown";
+    changelog = "https://github.com/tree-sitter-grammars/tree-sitter-markdown/releases/tag/v${version}";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ GaetanLepage ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 319446954554..83003a8ff767 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -17499,6 +17499,8 @@ self: super: with self; {
 
   tree-sitter-make = callPackage ../development/python-modules/tree-sitter-make { };
 
+  tree-sitter-markdown = callPackage ../development/python-modules/tree-sitter-markdown { };
+
   tree-sitter-python = callPackage ../development/python-modules/tree-sitter-python { };
 
   tree-sitter-rust = callPackage ../development/python-modules/tree-sitter-rust { };