diff --git a/pkgs/development/python-modules/blackjax/default.nix b/pkgs/development/python-modules/blackjax/default.nix
index 0a6c1fa53e84..f138d6a33e08 100644
--- a/pkgs/development/python-modules/blackjax/default.nix
+++ b/pkgs/development/python-modules/blackjax/default.nix
@@ -78,6 +78,10 @@ buildPythonPackage (finalAttrs: {
     # too slow
     "test_adaptive_tempered_smc"
 
+    # AssertionError: False is not true : f32: controller never escalated (U=0);
+    # axis-aligned spike would do this, ensure u_dir is non-axis-aligned
+    "test_escalated_e2e_smoke_f32_and_x64"
+
     # AssertionError on numerical values
     "test_barker"
     "test_imm_shrinkage_seed_influence_persists_diagonal"