diff --git a/src/resources/extensions/sf/tests/uok-purpose-coherence.test.mjs b/src/resources/extensions/sf/tests/uok-purpose-coherence.test.mjs
index 1b8eb3a79..10e415d26 100644
--- a/src/resources/extensions/sf/tests/uok-purpose-coherence.test.mjs
+++ b/src/resources/extensions/sf/tests/uok-purpose-coherence.test.mjs
@@ -173,18 +173,15 @@ function makeLegacyDb() {
 }
 
 /**
- * Open an SF DB and bolt on the columns the parallel migrations will
- * eventually add. Mirrors the post-P2/P3 schema so we can exercise the
- * "trace column present, value NULL" and "full chain present" branches.
+ * Open an SF DB. Post-P2/P3 merge the trace columns are already added
+ * by the schema migration ladder (v70 = tasks.purpose_trace,
+ * v72 = slices.traces_vision_fragment), so no manual ALTER is needed.
+ * Test value-NULL paths by inserting rows with explicit NULL.
  */
 function makeForwardDb() {
 	const base = makeProject();
 	openDatabase(join(base, ".sf", "sf.db"));
 	const db = _getAdapter();
-	db.exec(
-		"ALTER TABLE slices ADD COLUMN traces_vision_fragment TEXT DEFAULT NULL",
-	);
-	db.exec("ALTER TABLE tasks ADD COLUMN purpose_trace TEXT DEFAULT NULL");
 	return { base, db };
 }
 
@@ -206,7 +203,11 @@ describe("evaluatePurposeCoherence (DB-backed)", () => {
 			db,
 		});
 		expect(verdict.outcome).toBe("warn");
-		expect(verdict.rationale).toMatch(/traces_vision_fragment column/);
+		// Post-migration the column always exists; the warn message now
+		// reports the NULL value rather than the absent column. The gate
+		// itself still keeps the column-missing SqliteError catch so
+		// projects that somehow predate the migration don't hard-fail.
+		expect(verdict.rationale).toMatch(/slice goal does not trace/);
 	});
 
 	test("vision missing on legacy DB → fail", () => {