diff --git a/tests/test_pipeline_smoke_imp85.py b/tests/test_pipeline_smoke_imp85.py
index 7389d46..d99bda5 100644
--- a/tests/test_pipeline_smoke_imp85.py
+++ b/tests/test_pipeline_smoke_imp85.py
@@ -81,15 +81,21 @@ def _unique_run_id(prefix: str) -> str:
 @pytest.mark.parametrize(
     "mdx_name,prefix",
     [
+        ("01.mdx", "mdx01"),
+        ("02.mdx", "mdx02"),
         ("03.mdx", "mdx03"),
     ],
 )
 def test_non_vp_smoke_runs_clean(mdx_name: str, prefix: str) -> None:
-    """mdx03 hits non-VP rank-1 frames; the pipeline runs to exit 0.
+    """mdx01/02/03 hit non-VP rank-1 frames; the pipeline runs to exit 0.
 
     Non-VP rank-1 selection is the normal Phase Z path and the
     primary regression guard that IMP-#85 u1-u6 do not perturb
-    mapper / pipeline behaviour for non-VP routes.
+    mapper / pipeline behaviour for non-VP routes. IMP-#91 u1 extends
+    the parametrization from mdx03-only to the mdx01/02/03 acceptance
+    triple — closing the subprocess-axis coverage gap for the two
+    non-VP mdx that had only in-process B4 SHA parity coverage
+    (tests/regression/test_b4_mapper_source_sha_parity.py).
 
     IMP-#87 u5 — mdx05 was removed from this parametrization because
     its V4 evidence is empty for every aligned section (Case B,