diff --git a/tests/unit/test_umma_qk.cu b/tests/unit/test_umma_qk.cu
index 8d69704d..cc5dd634 100644
--- a/tests/unit/test_umma_qk.cu
+++ b/tests/unit/test_umma_qk.cu
@@ -106,22 +106,22 @@ test_umma_qk_hd16(
         s_out[133] = (float)sQ_smem;
         s_out[134] = (float)sK_smem;
         s_out[135] = (float)__cvta_generic_to_shared(sQ);
+        s_out[136] = (float)(sQ_smem >> 4);  // start_address for desc
+        s_out[137] = (float)(sQ_smem & 0xF);  // alignment check
     }
     __syncthreads();
 
     // ================================================================
-    // Call tcgen05.mma SS
+    // SKIP MMA for now — just test descriptor construction
     // ================================================================
-    if (tid == 0) {
-        umma_ss_f16(tmem_base, desc_q, desc_k, idesc, /*accumulate=*/false);
-    }
-    __syncwarp();
-
-    // Wait for MMA
-    if (wid == 0 && lane == 0) {
-        tmem_fence_store();
-    }
-    __syncthreads();
+    // if (tid == 0) {
+    //     umma_ss_f16(tmem_base, desc_q, desc_k, idesc, /*accumulate=*/false);
+    // }
+    // __syncwarp();
+    // if (wid == 0 && lane == 0) {
+    //     tmem_fence_store();
+    // }
+    // __syncthreads();
 
     // ================================================================
     // Read S from TMEM