diff --git a/crates/kernel/src/blend.rs b/crates/kernel/src/blend.rs
index d947e6bc25..93dcbf8711 100644
--- a/crates/kernel/src/blend.rs
+++ b/crates/kernel/src/blend.rs
@@ -1292,7 +1292,6 @@ mod tests {
     /// At 1° the crease rounds from 0.526 mm: R2 lies 0.076 µm in and R20 0.76 µm, and each
     /// builds, removing 20 · r²(tan(δ/2) − δ/2).
     #[test]
-    #[ignore = "fails until SMLib rounds creases from 0.5° (SmEdge::GetBlendEdgeuse calls an edge within 2° of tangent smooth: SM_ERR_INVALID_INPUT)"]
     fn a_one_degree_crease_rounds_from_the_smallest_radius_named() {
         let (gentle, crease) = roof(0.5);
         let turn = 1f64.to_radians();
diff --git a/tests/kernel-cases/fillets/KNOWN_FAILING b/tests/kernel-cases/fillets/KNOWN_FAILING
index 1946a83b34..c0b440f785 100644
--- a/tests/kernel-cases/fillets/KNOWN_FAILING
+++ b/tests/kernel-cases/fillets/KNOWN_FAILING
@@ -28,11 +28,7 @@
 5835-chamfer-sloped-basin-1-mm-rim-2-two-edges SMLib status 1001: SmFilletNx2Corner, CalcFilletIntSideFace cannot intersect a chamfer with the side face at the rim's corner, where the front chamfer past the rim should build cut by the front face
 5835-chamfer-sloped-basin-4-mm-rim-2-2-edges SMLib status 1001 on the chamfers meeting at the rim's re-entrant corner
 5835-chamfer-sloped-basin-4-mm-rim-2-4-edges SMLib status 1001 on the chamfers meeting at the rim's re-entrant corners
-851-chamfer-knife-edge-tip-0-5 SMLib SM_ERR_INVALID_INPUT: smlib_chamfer takes the ball radius d·√((1−c)/(1+c)), c the faces' binormals' dot (capi chamfer_radius), which is 0 at a cusp, where they agree; the case wants the ball of radius d
-851-chamfer-knife-edge-tip-2 SMLib SM_ERR_INVALID_INPUT: smlib_chamfer takes the ball radius d·√((1−c)/(1+c)), c the faces' binormals' dot (capi chamfer_radius), which is 0 at a cusp, where they agree; the case wants the ball of radius d
-851-chamfer-knife-edge-tip-2-box-less-cylinder SMLib SM_ERR_INVALID_INPUT: smlib_chamfer takes the ball radius d·√((1−c)/(1+c)), c the faces' binormals' dot (capi chamfer_radius), which is 0 at a cusp, where they agree; the case wants the ball of radius d
-851-chamfer-knife-edge-tip-2-sketched SMLib SM_ERR_INVALID_INPUT: smlib_chamfer takes the ball radius d·√((1−c)/(1+c)), c the faces' binormals' dot (capi chamfer_radius), which is 0 at a cusp, where they agree; the case wants the ball of radius d
-851-chamfer-knife-edge-tip-5 SMLib SM_ERR_INVALID_INPUT: smlib_chamfer takes the ball radius d·√((1−c)/(1+c)), c the faces' binormals' dot (capi chamfer_radius), which is 0 at a cusp, where they agree; the case wants the ball of radius d
+851-chamfer-knife-edge-tip-0-5 SMLib SMLIB_ERR_NOT_SOLID: at a chamfer of 0.5 to 0.8 on the knife edge the chamfer face is built but left apart from the body, which keeps its knife edge
 9-fillet-corner-curvature-with-reduce-fit not supported yet: solid.fillet builds corner g2 with the exact fit only
 9-fillet-corner-curvature-with-taper-fit not supported yet: solid.fillet builds corner g2 with the exact fit only
 926-chamfer-top-edge-ending-on-boss-wall-above-it not supported yet: the chamfer is refused as larger than its faces where it ends on the boss's wall