diff --git a/test/external/fuzz_linearizer.py b/test/external/fuzz_linearizer.py
index d237af50df..9e186310c2 100644
--- a/test/external/fuzz_linearizer.py
+++ b/test/external/fuzz_linearizer.py
@@ -12,6 +12,7 @@ from tinygrad.engine.graph import print_tree
 from tinygrad.engine.realize import CompiledRunner
 from tinygrad.helpers import getenv, from_mv, prod, colored, Context, DEBUG
 from tinygrad.ops import LazyOp, UnaryOps, BufferOps
+from test.helpers import is_dtype_supported
 
 def tuplize_uops(uops:List[UOp]) -> Tuple:
   return tuple([(x.uop, x.dtype, tuple(uops.index(x) for x in x.vin), x.arg) for x in uops])
@@ -211,9 +212,13 @@ if __name__ == "__main__":
     if ast in seen_ast_strs: continue
     seen_ast_strs.add(ast)
 
+    lin = ast_str_to_lin(ast)
+    if not all(is_dtype_supported(buf.dtype) for buf in lin.bufs):
+      print("skipping kernel due to not supported dtype")
+      continue
+
     print(f"testing ast {i}")
     tested += 1
-    lin = ast_str_to_lin(ast)
 
     fuzz_failures = fuzz_linearizer(lin, rtol=args.rtol, atol=args.atol)
     if fuzz_failures: failed_ids.append(i)