diff --git a/test/unit/test_dtype_spec.py b/test/unit/test_dtype_spec.py
index 63990f7fd3..175edf851a 100644
--- a/test/unit/test_dtype_spec.py
+++ b/test/unit/test_dtype_spec.py
@@ -378,7 +378,7 @@ class TestTypePromotion(unittest.TestCase):
     assert least_upper_dtype(dtypes.int32, dtypes.uint32) == dtypes.int64
     assert least_upper_dtype(dtypes.uint32, dtypes.int64) == dtypes.int64
     # similar to jax but we don't use weak type
-    assert least_upper_dtype(dtypes.int64, dtypes.uint64) == dtypes.float16
+    assert least_upper_dtype(dtypes.int64, dtypes.uint64) == dtypes.fp8e4m3
     assert least_upper_dtype(dtypes.float16, dtypes.float32) == dtypes.float32
     assert least_upper_dtype(dtypes.float32, dtypes.float64) == dtypes.float64
 
@@ -387,6 +387,14 @@ class TestTypePromotion(unittest.TestCase):
     assert least_upper_dtype(dtypes.float16, dtypes.int64) == dtypes.float16
     assert least_upper_dtype(dtypes.float16, dtypes.uint64) == dtypes.float16
     assert least_upper_dtype(dtypes.fp8e4m3, dtypes.fp8e5m2) == dtypes.half
+    assert least_upper_dtype(dtypes.fp8e4m3, dtypes.bfloat16) == dtypes.bfloat16
+    assert least_upper_dtype(dtypes.fp8e5m2, dtypes.bfloat16) == dtypes.bfloat16
+    assert least_upper_dtype(dtypes.fp8e4m3, dtypes.float16) == dtypes.float16
+    assert least_upper_dtype(dtypes.fp8e5m2, dtypes.float16) == dtypes.float16
+    assert least_upper_dtype(dtypes.fp8e4m3, dtypes.int64) == dtypes.fp8e4m3
+    assert least_upper_dtype(dtypes.fp8e4m3, dtypes.uint64) == dtypes.fp8e4m3
+    assert least_upper_dtype(dtypes.fp8e5m2, dtypes.int64) == dtypes.fp8e5m2
+    assert least_upper_dtype(dtypes.fp8e5m2, dtypes.uint64) == dtypes.fp8e5m2
 
 class TestAutoCastType(unittest.TestCase):
   def setUp(self):
diff --git a/tinygrad/dtype.py b/tinygrad/dtype.py
index 37fe4608f6..b94bd3f6a4 100644
--- a/tinygrad/dtype.py
+++ b/tinygrad/dtype.py
@@ -177,8 +177,8 @@ def to_dtype(dtype:DTypeLike) -> DType: return dtype if isinstance(dtype, DType)
 # https://jax.readthedocs.io/en/latest/jep/9407-type-promotion.html
 # we don't support weak type and complex type
 promo_lattice = { dtypes.bool: [dtypes.int8, dtypes.uint8], dtypes.int8: [dtypes.int16], dtypes.int16: [dtypes.int32], dtypes.int32: [dtypes.int64],
-  dtypes.int64: [dtypes.float16, dtypes.bfloat16], dtypes.uint8: [dtypes.int16, dtypes.uint16], dtypes.uint16: [dtypes.int32, dtypes.uint32],
-  dtypes.uint32: [dtypes.int64, dtypes.uint64], dtypes.uint64: [dtypes.float16, dtypes.bfloat16],
+  dtypes.int64: [dtypes.fp8e4m3, dtypes.fp8e5m2], dtypes.uint8: [dtypes.int16, dtypes.uint16], dtypes.uint16: [dtypes.int32, dtypes.uint32],
+  dtypes.uint32: [dtypes.int64, dtypes.uint64], dtypes.uint64: [dtypes.fp8e4m3, dtypes.fp8e5m2],
   dtypes.fp8e5m2: [dtypes.float16, dtypes.bfloat16], dtypes.fp8e4m3: [dtypes.float16, dtypes.bfloat16],
   dtypes.float16: [dtypes.float32], dtypes.bfloat16: [dtypes.float32], dtypes.float32: [dtypes.float64], }