diff --git a/pkgs/development/python-modules/langchain-core/default.nix b/pkgs/development/python-modules/langchain-core/default.nix
index 6959d502dace..26127cddb86a 100644
--- a/pkgs/development/python-modules/langchain-core/default.nix
+++ b/pkgs/development/python-modules/langchain-core/default.nix
@@ -37,14 +37,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-core";
-  version = "1.1.3";
+  version = "1.2.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-core==${version}";
-    hash = "sha256-2wOe9vIqYIxPDh3gXnuHTqcXx1iOtBTCInFieWsL4Ow=";
+    hash = "sha256-WJITm+8XIqezr/2U8HpE0J4hYdzg2Z6tw8b5s6SF6m0=";
   };
 
   sourceRoot = "${src.name}/libs/core";
diff --git a/pkgs/development/python-modules/langchain/default.nix b/pkgs/development/python-modules/langchain/default.nix
index e7349f80a194..f0cc30d47699 100644
--- a/pkgs/development/python-modules/langchain/default.nix
+++ b/pkgs/development/python-modules/langchain/default.nix
@@ -126,6 +126,8 @@ buildPythonPackage rec {
     "test_timeout_returns_error"
     # Can't see the shell session results when sandboxed
     "test_startup_and_shutdown_commands"
+    # Timing sensitive tests
+    "test_tool_retry_constant_backoff"
   ];
 
   disabledTestPaths = [