diff --git a/tests/unit/test_part_a_decode_diagnostics.py b/tests/unit/test_part_a_decode_diagnostics.py
index fff125f7..b7c8ed3f 100644
--- a/tests/unit/test_part_a_decode_diagnostics.py
+++ b/tests/unit/test_part_a_decode_diagnostics.py
@@ -269,6 +269,14 @@ def main():
                     X_diag, A_l_a, attn_norms.get(li).to(dev, torch.float32))
                 x_normed = dequantize_nvfp4(x_quant_attn.x_fp4, x_quant_attn.x_sf, x_quant_attn.gsa)
                 print(f"    |x_normed|={x_normed.abs().max().item():.2f} gsa={x_quant_attn.gsa}", flush=True)
+                # Run compressor and print raw output
+                comp_diag = compressors.get(li)
+                if comp_diag is not None:
+                    comp_kv_d, comp_pos_d, _ = comp_diag.forward(x_normed, pos)
+                    if comp_kv_d is not None:
+                        print(f"    Compressor output: |comp_kv|={comp_kv_d.abs().max().item():.2f} shape={tuple(comp_kv_d.shape)}", flush=True)
+                    else:
+                        print(f"    Compressor output: None (n_complete=0)", flush=True)
                 # Print KV cache state BEFORE calling forward_attention
                 kc_diag = kv_caches[li]
                 swa_kv_d, swa_pos_d = kc_diag.get_swa()