diff --git a/test/parallel/test-buffer-indexof.js b/test/parallel/test-buffer-indexof.js
index 5757200c2b0470..746a2723167a60 100644
--- a/test/parallel/test-buffer-indexof.js
+++ b/test/parallel/test-buffer-indexof.js
@@ -11,65 +11,65 @@ const buf_f = Buffer.from('f');
 const buf_z = Buffer.from('z');
 const buf_empty = Buffer.from('');
 
-assert.equal(b.indexOf('a'), 0);
-assert.equal(b.indexOf('a', 1), -1);
-assert.equal(b.indexOf('a', -1), -1);
-assert.equal(b.indexOf('a', -4), -1);
-assert.equal(b.indexOf('a', -b.length), 0);
-assert.equal(b.indexOf('a', NaN), 0);
-assert.equal(b.indexOf('a', -Infinity), 0);
-assert.equal(b.indexOf('a', Infinity), -1);
-assert.equal(b.indexOf('bc'), 1);
-assert.equal(b.indexOf('bc', 2), -1);
-assert.equal(b.indexOf('bc', -1), -1);
-assert.equal(b.indexOf('bc', -3), -1);
-assert.equal(b.indexOf('bc', -5), 1);
-assert.equal(b.indexOf('bc', NaN), 1);
-assert.equal(b.indexOf('bc', -Infinity), 1);
-assert.equal(b.indexOf('bc', Infinity), -1);
-assert.equal(b.indexOf('f'), b.length - 1);
-assert.equal(b.indexOf('z'), -1);
-assert.equal(b.indexOf(''), -1);
-assert.equal(b.indexOf('', 1), -1);
-assert.equal(b.indexOf('', b.length + 1), -1);
-assert.equal(b.indexOf('', Infinity), -1);
-assert.equal(b.indexOf(buf_a), 0);
-assert.equal(b.indexOf(buf_a, 1), -1);
-assert.equal(b.indexOf(buf_a, -1), -1);
-assert.equal(b.indexOf(buf_a, -4), -1);
-assert.equal(b.indexOf(buf_a, -b.length), 0);
-assert.equal(b.indexOf(buf_a, NaN), 0);
-assert.equal(b.indexOf(buf_a, -Infinity), 0);
-assert.equal(b.indexOf(buf_a, Infinity), -1);
-assert.equal(b.indexOf(buf_bc), 1);
-assert.equal(b.indexOf(buf_bc, 2), -1);
-assert.equal(b.indexOf(buf_bc, -1), -1);
-assert.equal(b.indexOf(buf_bc, -3), -1);
-assert.equal(b.indexOf(buf_bc, -5), 1);
-assert.equal(b.indexOf(buf_bc, NaN), 1);
-assert.equal(b.indexOf(buf_bc, -Infinity), 1);
-assert.equal(b.indexOf(buf_bc, Infinity), -1);
-assert.equal(b.indexOf(buf_f), b.length - 1);
-assert.equal(b.indexOf(buf_z), -1);
-assert.equal(b.indexOf(buf_empty), -1);
-assert.equal(b.indexOf(buf_empty, 1), -1);
-assert.equal(b.indexOf(buf_empty, b.length + 1), -1);
-assert.equal(b.indexOf(buf_empty, Infinity), -1);
-assert.equal(b.indexOf(0x61), 0);
-assert.equal(b.indexOf(0x61, 1), -1);
-assert.equal(b.indexOf(0x61, -1), -1);
-assert.equal(b.indexOf(0x61, -4), -1);
-assert.equal(b.indexOf(0x61, -b.length), 0);
-assert.equal(b.indexOf(0x61, NaN), 0);
-assert.equal(b.indexOf(0x61, -Infinity), 0);
-assert.equal(b.indexOf(0x61, Infinity), -1);
-assert.equal(b.indexOf(0x0), -1);
+assert.strictEqual(b.indexOf('a'), 0);
+assert.strictEqual(b.indexOf('a', 1), -1);
+assert.strictEqual(b.indexOf('a', -1), -1);
+assert.strictEqual(b.indexOf('a', -4), -1);
+assert.strictEqual(b.indexOf('a', -b.length), 0);
+assert.strictEqual(b.indexOf('a', NaN), 0);
+assert.strictEqual(b.indexOf('a', -Infinity), 0);
+assert.strictEqual(b.indexOf('a', Infinity), -1);
+assert.strictEqual(b.indexOf('bc'), 1);
+assert.strictEqual(b.indexOf('bc', 2), -1);
+assert.strictEqual(b.indexOf('bc', -1), -1);
+assert.strictEqual(b.indexOf('bc', -3), -1);
+assert.strictEqual(b.indexOf('bc', -5), 1);
+assert.strictEqual(b.indexOf('bc', NaN), 1);
+assert.strictEqual(b.indexOf('bc', -Infinity), 1);
+assert.strictEqual(b.indexOf('bc', Infinity), -1);
+assert.strictEqual(b.indexOf('f'), b.length - 1);
+assert.strictEqual(b.indexOf('z'), -1);
+assert.strictEqual(b.indexOf(''), -1);
+assert.strictEqual(b.indexOf('', 1), -1);
+assert.strictEqual(b.indexOf('', b.length + 1), -1);
+assert.strictEqual(b.indexOf('', Infinity), -1);
+assert.strictEqual(b.indexOf(buf_a), 0);
+assert.strictEqual(b.indexOf(buf_a, 1), -1);
+assert.strictEqual(b.indexOf(buf_a, -1), -1);
+assert.strictEqual(b.indexOf(buf_a, -4), -1);
+assert.strictEqual(b.indexOf(buf_a, -b.length), 0);
+assert.strictEqual(b.indexOf(buf_a, NaN), 0);
+assert.strictEqual(b.indexOf(buf_a, -Infinity), 0);
+assert.strictEqual(b.indexOf(buf_a, Infinity), -1);
+assert.strictEqual(b.indexOf(buf_bc), 1);
+assert.strictEqual(b.indexOf(buf_bc, 2), -1);
+assert.strictEqual(b.indexOf(buf_bc, -1), -1);
+assert.strictEqual(b.indexOf(buf_bc, -3), -1);
+assert.strictEqual(b.indexOf(buf_bc, -5), 1);
+assert.strictEqual(b.indexOf(buf_bc, NaN), 1);
+assert.strictEqual(b.indexOf(buf_bc, -Infinity), 1);
+assert.strictEqual(b.indexOf(buf_bc, Infinity), -1);
+assert.strictEqual(b.indexOf(buf_f), b.length - 1);
+assert.strictEqual(b.indexOf(buf_z), -1);
+assert.strictEqual(b.indexOf(buf_empty), -1);
+assert.strictEqual(b.indexOf(buf_empty, 1), -1);
+assert.strictEqual(b.indexOf(buf_empty, b.length + 1), -1);
+assert.strictEqual(b.indexOf(buf_empty, Infinity), -1);
+assert.strictEqual(b.indexOf(0x61), 0);
+assert.strictEqual(b.indexOf(0x61, 1), -1);
+assert.strictEqual(b.indexOf(0x61, -1), -1);
+assert.strictEqual(b.indexOf(0x61, -4), -1);
+assert.strictEqual(b.indexOf(0x61, -b.length), 0);
+assert.strictEqual(b.indexOf(0x61, NaN), 0);
+assert.strictEqual(b.indexOf(0x61, -Infinity), 0);
+assert.strictEqual(b.indexOf(0x61, Infinity), -1);
+assert.strictEqual(b.indexOf(0x0), -1);
 
 // test offsets
-assert.equal(b.indexOf('d', 2), 3);
-assert.equal(b.indexOf('f', 5), 5);
-assert.equal(b.indexOf('f', -1), 5);
-assert.equal(b.indexOf('f', 6), -1);
+assert.strictEqual(b.indexOf('d', 2), 3);
+assert.strictEqual(b.indexOf('f', 5), 5);
+assert.strictEqual(b.indexOf('f', -1), 5);
+assert.strictEqual(b.indexOf('f', 6), -1);
 
 assert.equal(b.indexOf(Buffer.from('d'), 2), 3);
 assert.equal(b.indexOf(Buffer.from('f'), 5), 5);