diff --git a/tests/pure/es.aggregate-error.js b/tests/pure/es.aggregate-error.js
index 0cc92c146393..37517c27b749 100644
--- a/tests/pure/es.aggregate-error.js
+++ b/tests/pure/es.aggregate-error.js
@@ -18,14 +18,14 @@ QUnit.test('AggregateError', assert => {
   assert.throws(() => AggregateError([1], Symbol()), 'throws on symbol as a message');
   assert.same(toString(AggregateError([1])), '[object Error]', 'Object#toString');
 
-  assert.ok(AggregateError([1], 1) instanceof AggregateError, 'no cause, without new');
-  assert.ok(new AggregateError([1], 1) instanceof AggregateError, 'no cause, with new');
+  assert.true(AggregateError([1], 1) instanceof AggregateError, 'no cause, without new');
+  assert.true(new AggregateError([1], 1) instanceof AggregateError, 'no cause, with new');
 
-  assert.ok(AggregateError([1], 1, {}) instanceof AggregateError, 'with options, without new');
-  assert.ok(new AggregateError([1], 1, {}) instanceof AggregateError, 'with options, with new');
+  assert.true(AggregateError([1], 1, {}) instanceof AggregateError, 'with options, without new');
+  assert.true(new AggregateError([1], 1, {}) instanceof AggregateError, 'with options, with new');
 
-  assert.ok(AggregateError([1], 1, 'foo') instanceof AggregateError, 'non-object options, without new');
-  assert.ok(new AggregateError([1], 1, 'foo') instanceof AggregateError, 'non-object options, with new');
+  assert.true(AggregateError([1], 1, 'foo') instanceof AggregateError, 'non-object options, without new');
+  assert.true(new AggregateError([1], 1, 'foo') instanceof AggregateError, 'non-object options, with new');
 
   assert.same(AggregateError([1], 1, { cause: 7 }).cause, 7, 'cause, without new');
   assert.same(new AggregateError([1], 1, { cause: 7 }).cause, 7, 'cause, with new');
@@ -39,12 +39,12 @@ QUnit.test('AggregateError', assert => {
   assert.same(error.message, '1', 'instance message');
   assert.same(error.cause, 7, 'instance cause');
   // eslint-disable-next-line no-prototype-builtins -- safe
-  assert.ok(error.hasOwnProperty('cause'), 'cause is own');
+  assert.true(error.hasOwnProperty('cause'), 'cause is own');
 
   error = AggregateError([1]);
   assert.deepEqual(error.errors, [1]);
   assert.same(error.message, '', 'default instance message');
   assert.same(error.cause, undefined, 'default instance cause undefined');
   // eslint-disable-next-line no-prototype-builtins -- safe
-  assert.ok(!error.hasOwnProperty('cause'), 'default instance cause missed');
+  assert.false(error.hasOwnProperty('cause'), 'default instance cause missed');
 });
diff --git a/tests/pure/es.error.cause.js b/tests/pure/es.error.cause.js
index 08071f436b18..2e6ce6150b62 100644
--- a/tests/pure/es.error.cause.js
+++ b/tests/pure/es.error.cause.js
@@ -11,17 +11,17 @@ function runErrorTestCase($Error, ERROR_NAME) {
 
     if (PROTO && $Error !== path.Error) {
       // eslint-disable-next-line no-prototype-builtins -- safe
-      assert.ok(path.Error.isPrototypeOf($Error), 'constructor has `Error` in the prototype chain');
+      assert.true(path.Error.isPrototypeOf($Error), 'constructor has `Error` in the prototype chain');
     }
 
-    assert.ok($Error(1) instanceof $Error, 'no cause, without new');
-    assert.ok(new $Error(1) instanceof $Error, 'no cause, with new');
+    assert.true($Error(1) instanceof $Error, 'no cause, without new');
+    assert.true(new $Error(1) instanceof $Error, 'no cause, with new');
 
-    assert.ok($Error(1, {}) instanceof $Error, 'with options, without new');
-    assert.ok(new $Error(1, {}) instanceof $Error, 'with options, with new');
+    assert.true($Error(1, {}) instanceof $Error, 'with options, without new');
+    assert.true(new $Error(1, {}) instanceof $Error, 'with options, with new');
 
-    assert.ok($Error(1, 'foo') instanceof $Error, 'non-object options, without new');
-    assert.ok(new $Error(1, 'foo') instanceof $Error, 'non-object options, with new');
+    assert.true($Error(1, 'foo') instanceof $Error, 'non-object options, without new');
+    assert.true(new $Error(1, 'foo') instanceof $Error, 'non-object options, with new');
 
     assert.same($Error(1, { cause: 7 }).cause, 7, 'cause, without new');
     assert.same(new $Error(1, { cause: 7 }).cause, 7, 'cause, with new');
@@ -34,13 +34,13 @@ function runErrorTestCase($Error, ERROR_NAME) {
     assert.same(error.message, '1', 'instance message');
     assert.same(error.cause, 7, 'instance cause');
     // eslint-disable-next-line no-prototype-builtins -- safe
-    assert.ok(error.hasOwnProperty('cause'), 'cause is own');
+    assert.true(error.hasOwnProperty('cause'), 'cause is own');
 
     error = $Error();
     assert.same(error.message, '', 'default instance message');
     assert.same(error.cause, undefined, 'default instance cause undefined');
     // eslint-disable-next-line no-prototype-builtins -- safe
-    assert.ok(!error.hasOwnProperty('cause'), 'default instance cause missed');
+    assert.false(error.hasOwnProperty('cause'), 'default instance cause missed');
   });
 }
 
diff --git a/tests/tests/es.aggregate-error.js b/tests/tests/es.aggregate-error.js
index 20125607f29c..450a595db33d 100644
--- a/tests/tests/es.aggregate-error.js
+++ b/tests/tests/es.aggregate-error.js
@@ -18,16 +18,16 @@ QUnit.test('AggregateError', assert => {
 
   assert.same(AggregateError.prototype.constructor, AggregateError, 'prototype constructor');
   // eslint-disable-next-line no-prototype-builtins -- safe
-  assert.ok(!AggregateError.prototype.hasOwnProperty('cause'), 'prototype hasn`t cause');
+  assert.false(AggregateError.prototype.hasOwnProperty('cause'), 'prototype hasn`t cause');
 
-  assert.ok(AggregateError([1], 1) instanceof AggregateError, 'no cause, without new');
-  assert.ok(new AggregateError([1], 1) instanceof AggregateError, 'no cause, with new');
+  assert.true(AggregateError([1], 1) instanceof AggregateError, 'no cause, without new');
+  assert.true(new AggregateError([1], 1) instanceof AggregateError, 'no cause, with new');
 
-  assert.ok(AggregateError([1], 1, {}) instanceof AggregateError, 'with options, without new');
-  assert.ok(new AggregateError([1], 1, {}) instanceof AggregateError, 'with options, with new');
+  assert.true(AggregateError([1], 1, {}) instanceof AggregateError, 'with options, without new');
+  assert.true(new AggregateError([1], 1, {}) instanceof AggregateError, 'with options, with new');
 
-  assert.ok(AggregateError([1], 1, 'foo') instanceof AggregateError, 'non-object options, without new');
-  assert.ok(new AggregateError([1], 1, 'foo') instanceof AggregateError, 'non-object options, with new');
+  assert.true(AggregateError([1], 1, 'foo') instanceof AggregateError, 'non-object options, without new');
+  assert.true(new AggregateError([1], 1, 'foo') instanceof AggregateError, 'non-object options, with new');
 
   assert.same(AggregateError([1], 1, { cause: 7 }).cause, 7, 'cause, without new');
   assert.same(new AggregateError([1], 1, { cause: 7 }).cause, 7, 'cause, with new');
@@ -41,12 +41,12 @@ QUnit.test('AggregateError', assert => {
   assert.same(error.message, '1', 'instance message');
   assert.same(error.cause, 7, 'instance cause');
   // eslint-disable-next-line no-prototype-builtins -- safe
-  assert.ok(error.hasOwnProperty('cause'), 'cause is own');
+  assert.true(error.hasOwnProperty('cause'), 'cause is own');
 
   error = AggregateError([1]);
   assert.deepEqual(error.errors, [1]);
   assert.same(error.message, '', 'default instance message');
   assert.same(error.cause, undefined, 'default instance cause undefined');
   // eslint-disable-next-line no-prototype-builtins -- safe
-  assert.ok(!error.hasOwnProperty('cause'), 'default instance cause missed');
+  assert.false(error.hasOwnProperty('cause'), 'default instance cause missed');
 });
diff --git a/tests/tests/es.error.cause.js b/tests/tests/es.error.cause.js
index 0d32c2d90206..b89941797db0 100644
--- a/tests/tests/es.error.cause.js
+++ b/tests/tests/es.error.cause.js
@@ -11,21 +11,21 @@ function runErrorTestCase($Error, ERROR_NAME) {
 
     if (PROTO && $Error !== Error) {
       // eslint-disable-next-line no-prototype-builtins -- safe
-      assert.ok(Error.isPrototypeOf($Error), 'constructor has `Error` in the prototype chain');
+      assert.true(Error.isPrototypeOf($Error), 'constructor has `Error` in the prototype chain');
     }
 
     assert.same($Error.prototype.constructor, $Error, 'prototype constructor');
     // eslint-disable-next-line no-prototype-builtins -- safe
-    assert.ok(!$Error.prototype.hasOwnProperty('cause'), 'prototype hasn`t cause');
+    assert.false($Error.prototype.hasOwnProperty('cause'), 'prototype hasn`t cause');
 
-    assert.ok($Error(1) instanceof $Error, 'no cause, without new');
-    assert.ok(new $Error(1) instanceof $Error, 'no cause, with new');
+    assert.true($Error(1) instanceof $Error, 'no cause, without new');
+    assert.true(new $Error(1) instanceof $Error, 'no cause, with new');
 
-    assert.ok($Error(1, {}) instanceof $Error, 'with options, without new');
-    assert.ok(new $Error(1, {}) instanceof $Error, 'with options, with new');
+    assert.true($Error(1, {}) instanceof $Error, 'with options, without new');
+    assert.true(new $Error(1, {}) instanceof $Error, 'with options, with new');
 
-    assert.ok($Error(1, 'foo') instanceof $Error, 'non-object options, without new');
-    assert.ok(new $Error(1, 'foo') instanceof $Error, 'non-object options, with new');
+    assert.true($Error(1, 'foo') instanceof $Error, 'non-object options, without new');
+    assert.true(new $Error(1, 'foo') instanceof $Error, 'non-object options, with new');
 
     assert.same($Error(1, { cause: 7 }).cause, 7, 'cause, without new');
     assert.same(new $Error(1, { cause: 7 }).cause, 7, 'cause, with new');
@@ -38,13 +38,13 @@ function runErrorTestCase($Error, ERROR_NAME) {
     assert.same(error.message, '1', 'instance message');
     assert.same(error.cause, 7, 'instance cause');
     // eslint-disable-next-line no-prototype-builtins -- safe
-    assert.ok(error.hasOwnProperty('cause'), 'cause is own');
+    assert.true(error.hasOwnProperty('cause'), 'cause is own');
 
     error = $Error();
     assert.same(error.message, '', 'default instance message');
     assert.same(error.cause, undefined, 'default instance cause undefined');
     // eslint-disable-next-line no-prototype-builtins -- safe
-    assert.ok(!error.hasOwnProperty('cause'), 'default instance cause missed');
+    assert.false(error.hasOwnProperty('cause'), 'default instance cause missed');
   });
 }