diff --git a/tests/kernel-cases/threads/2369-m8-thread-in-6.3mm-hole-refused/expected.json b/tests/kernel-cases/threads/2369-m8-thread-in-6.3mm-hole-refused/expected.json
index 913f3ee0d4..d8af296e56 100644
--- a/tests/kernel-cases/threads/2369-m8-thread-in-6.3mm-hole-refused/expected.json
+++ b/tests/kernel-cases/threads/2369-m8-thread-in-6.3mm-hole-refused/expected.json
@@ -7,7 +7,7 @@
  ],
  "what": "a modelled thread on a hole that isn't the thread's size: refused with the size to use, never a silent change of the hole",
  "source": "analytic",
- "method": "Decision (#1018, #2853): a modelled thread never changes the size of the hole it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M8 (P 1.25): tap drill = 8 - 1.25 = 6.75 mm; basic minor diameter D1 = 8 - 2 x 5H/8 = 8 - 1.353 = 6.647 mm; a 6.3 mm hole is below the minor diameter, so the thread's teeth would fill part of the hole. Expected message: \"this 6.3 mm hole is too narrow for a modelled M8 thread (its teeth would fill the hole); drill 6.75 mm for M8\".",
+ "method": "Decision (#1018, #2853): a modelled thread never changes the size of the hole it is on; one that isn't the thread's size is refused, naming the size to use. A fill-to-tap-drill or turn-down option would be opt-in, off by default (see #3060), and get its own case. The refusal's numbers, from ISO 68-1 (H = P sqrt3/2, basic depth 5H/8): M8 (P 1.25): the tap drill is the tap maker's, 6.8 mm (Yamawa YEU23 p.704, as tapped holes take it since 05f1c6b9a and case 2115 grades; major minus pitch, 6.75 mm, is only for a size no table lists); basic minor diameter D1 = 8 - 2 x 5H/8 = 8 - 1.353 = 6.647 mm; a 6.3 mm hole is below the minor diameter, so the thread's teeth would fill part of the hole. Expected message: \"this 6.3 mm hole is too narrow for a modelled M8 thread (its teeth would fill the hole); drill 6.8 mm for M8\".",
  "outcome": "refused",
- "refusal": "this 6.3 mm hole is too narrow for a modelled M8 thread (its teeth would fill the hole); drill 6.75 mm for M8"
+ "refusal": "this 6.3 mm hole is too narrow for a modelled M8 thread (its teeth would fill the hole); drill 6.8 mm for M8"
 }
diff --git a/tests/kernel-cases/threads/KNOWN_FAILING b/tests/kernel-cases/threads/KNOWN_FAILING
index bf482e9273..599467703e 100644
--- a/tests/kernel-cases/threads/KNOWN_FAILING
+++ b/tests/kernel-cases/threads/KNOWN_FAILING
@@ -2,4 +2,3 @@
 # rig gate (.github/workflows/kernel-rig.yml) fails on a case that fails and is not listed here,
 # and on a listed case that passes: a fix removes its line in the same pull request.
 # Baseline: develop 5ada4fc8a with SMLib 90aabff (the run on 60b1c6a, aarch64 Linux).
-2369-m8-thread-in-6.3mm-hole-refused refused for the right reason, but the message differs from the one the case names