diff --git a/pkgs/development/python-modules/flax/default.nix b/pkgs/development/python-modules/flax/default.nix
index 50abb5eadef9..2c0f2cdaf367 100644
--- a/pkgs/development/python-modules/flax/default.nix
+++ b/pkgs/development/python-modules/flax/default.nix
@@ -83,6 +83,13 @@ buildPythonPackage rec {
     tensorflow
   ];
 
+  pytestFlagsArray = [
+    "-W"
+    # DeprecationWarning: Triggering of __jax_array__() during abstractification is deprecated.
+    # To avoid this error, either explicitly convert your object using jax.numpy.array(), or register your object as a pytree.
+    "ignore::DeprecationWarning"
+  ];
+
   disabledTestPaths = [
     # Docs test, needs extra deps + we're not interested in it.
     "docs/_ext/codediff_test.py"