diff --git a/tests/hlsl/tgsm.shader_test b/tests/hlsl/tgsm.shader_test
index 51e89d9b..21ad9ebe 100644
--- a/tests/hlsl/tgsm.shader_test
+++ b/tests/hlsl/tgsm.shader_test
@@ -161,3 +161,36 @@ void main(uint local_idx : SV_GroupIndex)
 [test]
 todo(sm<6) dispatch 1 1 1
 probe uav 1 (0) rui (39)
+
+[require]
+shader model >= 6.2
+native-16-bit
+
+[uav 1]
+format r32-typeless
+size (raw_buffer, 4)
+
+0xf000f 0xf000f 0xf000f 0xf000f
+
+[compute shader]
+RWByteAddressBuffer u : register(u1);
+groupshared uint16_t m[4];
+
+    [numthreads(4, 1, 1)]
+void main(uint local_idx : SV_GroupIndex, uint group_id : SV_GroupID)
+{
+    uint16_t id = (uint16_t)group_id.x;
+    /* 16-bit atomic ops are not supported. */
+    m[local_idx] = id + 8 * (local_idx + 1);
+    GroupMemoryBarrierWithGroupSync();
+    m[local_idx] += m[local_idx ^ 1];
+    GroupMemoryBarrierWithGroupSync();
+    u.Store(8 * group_id.x + 2 * local_idx, m[local_idx]);
+}
+
+[test]
+dispatch 2 1 1
+probe uav 1 (0) rui(0x180018)
+probe uav 1 (1) rui(0x380038)
+probe uav 1 (2) rui(0x1a001a)
+probe uav 1 (3) rui(0x3a003a)