diff --git a/backends/vulkan/test/op_tests/cases.py b/backends/vulkan/test/op_tests/cases.py
index d32fa715734..9cec4891c10 100644
--- a/backends/vulkan/test/op_tests/cases.py
+++ b/backends/vulkan/test/op_tests/cases.py
@@ -169,7 +169,13 @@ def get_linear_test_suites():
 
 @register_test_suite("aten._weight_int8pack_mm.default")
 def get_weight_int8pack_mm_inputs():
-    MKN_list = common_MKN_list
+    MKN_list = [
+        [6, 480, 256],
+        [6, 256, 1024],
+        [6, 1024, 256],
+        [6, 256, 256],
+        [6, 256, 512],
+    ]
 
     inputs_list = [((M, K), (N, K), (N)) for M, K, N in MKN_list]