diff --git a/pkgs/development/python-modules/libtmux/default.nix b/pkgs/development/python-modules/libtmux/default.nix
index cf9e72c110d7..aa026a98eb32 100644
--- a/pkgs/development/python-modules/libtmux/default.nix
+++ b/pkgs/development/python-modules/libtmux/default.nix
@@ -7,18 +7,19 @@
 , pytestCheckHook
 , procps
 , tmux
+, ncurses
 }:
 
 buildPythonPackage rec {
   pname = "libtmux";
-  version = "0.18.1";
+  version = "0.21.0";
   format = "pyproject";
 
   src = fetchFromGitHub {
     owner = "tmux-python";
     repo = pname;
     rev = "refs/tags/v${version}";
-    hash = "sha256-OhNyJcnxjbyP/Kpt70qLv3ZtZvXXVTWEMcjv/pa50/4=";
+    hash = "sha256-nZPVS3jNz2e2LTlWiSz1fN7MzqJs/CqtAt6UVZaPPTY=";
   };
 
   postPatch = ''
@@ -32,14 +33,20 @@ buildPythonPackage rec {
   nativeCheckInputs = [
     procps
     tmux
+    ncurses
     pytest-rerunfailures
     pytestCheckHook
   ];
 
-  pytestFlagsArray = [
-    "tests"
-  ] ++ lib.optionals stdenv.isDarwin [
-    "--ignore=tests/test_test.py"
+  pytestFlagsArray = [ "tests" ];
+
+  disabledTests = [
+    # Fail with: 'no server running on /tmp/tmux-1000/libtmux_test8sorutj1'.
+    "test_new_session_width_height"
+  ];
+
+  disabledTestPaths = lib.optionals stdenv.isDarwin [
+    "test_test.py"
   ];
 
   pythonImportsCheck = [ "libtmux" ];
diff --git a/pkgs/tools/misc/tmuxp/default.nix b/pkgs/tools/misc/tmuxp/default.nix
index 1b21a4d6029b..4750897b7801 100644
--- a/pkgs/tools/misc/tmuxp/default.nix
+++ b/pkgs/tools/misc/tmuxp/default.nix
@@ -6,11 +6,11 @@ let
 in
 pypkgs.buildPythonApplication rec {
   pname = "tmuxp";
-  version = "1.23.0";
+  version = "1.27.0";
 
   src = pypkgs.fetchPypi {
     inherit pname version;
-    sha256 = "Ix/43QFOa0kCP5xndszFGk0p12w/t/z+fVcYRIj9y0s=";
+    sha256 = "sha256-QAk+rcNYjhAgkJX2fa0bl3dHrB4yyYQ/oNlUX3IQMR8=";
   };
 
   # No tests in archive