diff --git a/tests/test_lion8b.py b/tests/test_lion8b.py
index 312480f61a..018ce5f7cd 100644
--- a/tests/test_lion8b.py
+++ b/tests/test_lion8b.py
@@ -331,13 +331,15 @@ def test_lion8b_fused_unfused_unquantized_same(w_init: str, grad_strategy: str,
         # at all; latter is "ground truth"
         assert cossim(diffs_true, diffs_fq, dim=-1) > min_cossim
         assert _nmse(diffs_true, diffs_fq) < max_nmse
+        
+        # error correction not supported on torch 2.1
+        if version.parse(torch.__version__) < version.parse('2.1.0'):
+            # fused impl with errors should also be close to "true" updates;
+            assert cossim(diffs_true, diffs_fqe, dim=-1) > min_cossim
+            assert _nmse(diffs_true, diffs_fqe) < max_nmse
 
-        # fused impl with errors should also be close to "true" updates;
-        assert cossim(diffs_true, diffs_fqe, dim=-1) > min_cossim
-        assert _nmse(diffs_true, diffs_fqe) < max_nmse
-
-        # error correction should reduce error, or at least do no worse
-        assert _nmse(diffs_true, diffs_fqe) <= _nmse(diffs_true, diffs_fq)
+            # error correction should reduce error, or at least do no worse
+            assert _nmse(diffs_true, diffs_fqe) <= _nmse(diffs_true, diffs_fq)
 
     # if sgd weights aren't different than LION weights, we haven't
     # changed them enough to meaningfully test the LION logic
@@ -601,12 +603,10 @@ def _time_kernels(N: int, D: int, min_elems_traversed: int):
         try:
             assert times[True] < times[False] + atol
             assert times[True] < times['NA'] + atol
-            assert times['ecc'] < times['NA'] + atol
-            print('')
-            print('time fused (ms):       ', times[True] * 1e3)
-            print('time fused+ecc (ms):   ', times['ecc'] * 1e3)
-            print('time unfused (ms):     ', times[False] * 1e3)
-            print('time unquantized (ms): ', times['NA'] * 1e3)
+
+            # error correction not supported on torch 2.1
+            if version.parse(torch.__version__) < version.parse('2.1.0'):
+                assert times['ecc'] < times['NA'] + atol
             break
         except AssertionError as e:
             if it >= 2:  # allow 3 retries to avoid flakiness