diff --git a/test/src/SAT.js b/test/src/SAT.js
index 93e65ac..78de393 100644
--- a/test/src/SAT.js
+++ b/test/src/SAT.js
@@ -2,7 +2,7 @@ import test from 'ava';
 import * as sat from '../../src/index.js';
 
 import * as compare from '@aureooms/js-compare';
-import {list} from '@aureooms/js-itertools';
+import {list, map} from '@aureooms/js-itertools';
 
 const lex = compare.lexicographical(compare.increasing);
 
@@ -77,3 +77,32 @@ test('#2', (t) => {
 		['C', 1],
 	]);
 });
+
+test('#3', (t) => {
+	const instance = sat.from.signs([
+		[-1, 2, 3],
+		[-2, -4, 5],
+		[1, -5],
+	]);
+	const satisfying_assignments = list(
+		map((certificate) => instance.assignment(certificate), sat.solve(instance)),
+	);
+	t.deepEqual(satisfying_assignments, [
+		[0, 0, 0, 0, 0, 0],
+		[0, 0, 0, 0, 1, 0],
+		[0, 0, 0, 1, 0, 0],
+		[0, 0, 0, 1, 1, 0],
+		[0, 0, 1, 0, 0, 0],
+		[0, 0, 1, 1, 0, 0],
+		[0, 1, 0, 1, 0, 0],
+		[0, 1, 0, 1, 0, 1],
+		[0, 1, 0, 1, 1, 0],
+		[0, 1, 0, 1, 1, 1],
+		[0, 1, 1, 0, 0, 0],
+		[0, 1, 1, 0, 0, 1],
+		[0, 1, 1, 0, 1, 1],
+		[0, 1, 1, 1, 0, 0],
+		[0, 1, 1, 1, 0, 1],
+		[0, 1, 1, 1, 1, 1],
+	]);
+});