diff --git a/CHANGELOG.md b/CHANGELOG.md
index c16c3b36..e3e832ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 <section class="release" id="unreleased">
 
-## Unreleased (2024-09-09)
+## Unreleased (2024-09-11)
 
 <section class="packages">
 
@@ -131,9 +131,11 @@
 
 ### Contributors
 
-A total of 1 person contributed to this release. Thank you to this contributor:
+A total of 3 people contributed to this release. Thank you to the following contributors:
 
 -   Athan Reines
+-   Philipp Burckhardt
+-   Soumajit Chatterjee
 
 </section>
 
@@ -145,6 +147,7 @@ A total of 1 person contributed to this release. Thank you to this contributor:
 
 <details>
 
+-   [`1f6fc8b`](https://github.com/stdlib-js/stdlib/commit/1f6fc8b5b99837f9d8b378413298f7544f1cb38e) - **bench:** update benchmarks to measure affirmative/negative test values _(by Soumajit Chatterjee, Philipp Burckhardt)_
 -   [`e97215f`](https://github.com/stdlib-js/stdlib/commit/e97215fbf9f4d1ec8548086f78ed04a0ec80a43f) - **feat:** add `hasBtoaSupport` to namespace _(by Athan Reines)_
 -   [`33219ce`](https://github.com/stdlib-js/stdlib/commit/33219cecbc347a85b4bb9659d00005fe7b5a6e64) - **feat:** add `assert/has-btoa-support` _(by Athan Reines)_
 -   [`80b8061`](https://github.com/stdlib-js/stdlib/commit/80b8061c5888d04dcaa48f0363669ba2606856df) - **feat:** add `hasAtobSupport` to namespace _(by Athan Reines)_
diff --git a/is-cube-number/benchmark/benchmark.js b/is-cube-number/benchmark/benchmark.js
index 9bf98634..bc787314 100644
--- a/is-cube-number/benchmark/benchmark.js
+++ b/is-cube-number/benchmark/benchmark.js
@@ -16,7 +16,7 @@
 * limitations under the License.
 */
 
-/* eslint-disable no-new-wrappers, no-empty-function */
+/* eslint-disable no-empty-function */
 
 'use strict';
 
@@ -31,26 +31,51 @@ var isCubeNumber = require( './../lib' );
 
 // MAIN //
 
-bench( pkg+'::primitives', function benchmark( b ) {
+bench( pkg+'::primitives,true', function benchmark( b ) {
+	var values;
+	var bool;
+	var i;
+
+	values = [
+		8,
+		64,
+		1,
+		-27,
+		-8,
+		125,
+		-1000,
+		27
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		bool = isCubeNumber( values[ i % values.length ] );
+		if ( typeof bool !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( bool ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( pkg+'::primitives,false', function benchmark( b ) {
 	var values;
 	var bool;
 	var i;
 
 	values = [
 		'5',
-		5,
-		4,
-		0.5,
-		1.0,
-		0.0,
-		3.14,
-		-5,
-		-4,
 		NaN,
 		true,
 		false,
 		null,
-		void 0
+		void 0,
+		-6,
+		7.25
 	];
 
 	b.tic();
@@ -68,19 +93,51 @@ bench( pkg+'::primitives', function benchmark( b ) {
 	b.end();
 });
 
-bench( pkg+'::objects', function benchmark( b ) {
+bench( pkg+'::objects,true', function benchmark( b ) {
 	var values;
 	var bool;
 	var i;
 
 	values = [
+		new Number( 8 ),
+		new Number( 64 ),
+		new Number( 1 ),
+		new Number( -27 ),
+		new Number( -8 ),
+		new Number( 125 ),
+		new Number( -1000 ),
+		new Number( 27 )
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		bool = isCubeNumber( values[ i % values.length ] );
+		if ( typeof bool !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( bool ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( pkg+'::objects,false', function benchmark( b ) {
+	var values;
+	var bool;
+	var i;
+
+	values = [
+		new Number( 5 ),
+		new Number( NaN ),
+		new Number( 3.14 ),
+		new Number( -6 ),
+		new Number( 7.25 ),
 		[],
 		{},
-		function noop() {},
-		new Number( 8.0 ),
-		new Number( 0.5 ),
-		new Number( NaN ),
-		new Number( 3.14 )
+		function noop() {}
 	];
 
 	b.tic();
@@ -98,26 +155,51 @@ bench( pkg+'::objects', function benchmark( b ) {
 	b.end();
 });
 
-bench( pkg+'::primitives:isPrimitive', function benchmark( b ) {
+bench( pkg+'::primitives:isPrimitive,true', function benchmark( b ) {
+	var values;
+	var bool;
+	var i;
+
+	values = [
+		8,
+		64,
+		1,
+		-27,
+		-8,
+		125,
+		-1000,
+		27
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		bool = isCubeNumber.isPrimitive( values[ i % values.length ] );
+		if ( typeof bool !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( bool ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( pkg+'::primitives:isPrimitive,false', function benchmark( b ) {
 	var values;
 	var bool;
 	var i;
 
 	values = [
 		'5',
-		5,
-		4,
-		3.14,
-		0.5,
-		1.0,
-		0.0,
-		-5,
-		-4,
 		NaN,
 		true,
 		false,
 		null,
-		void 0
+		void 0,
+		-6,
+		7.25
 	];
 
 	b.tic();
@@ -135,19 +217,23 @@ bench( pkg+'::primitives:isPrimitive', function benchmark( b ) {
 	b.end();
 });
 
-bench( pkg+'::objects:isPrimitive', function benchmark( b ) {
+bench( pkg+'::objects:isPrimitive,false', function benchmark( b ) {
 	var values;
 	var bool;
 	var i;
 
 	values = [
+		new Number( 8 ),
+		new Number( 64 ),
+		new Number( 1 ),
+		new Number( -27 ),
+		new Number( -8 ),
+		new Number( 125 ),
+		new Number( -1000 ),
+		new Number( 27 ),
 		[],
 		{},
-		function noop() {},
-		new Number( 8.0 ),
-		new Number( 0.5 ),
-		new Number( NaN ),
-		new Number( 3.14 )
+		function noop() {}
 	];
 
 	b.tic();
@@ -165,26 +251,51 @@ bench( pkg+'::objects:isPrimitive', function benchmark( b ) {
 	b.end();
 });
 
-bench( pkg+'::primitives:isObject', function benchmark( b ) {
+bench( pkg+'::primitives:isObject,false', function benchmark( b ) {
 	var values;
 	var bool;
 	var i;
 
 	values = [
 		'5',
-		5,
-		4,
-		3.14,
-		0.5,
-		1.0,
-		0.0,
-		-5,
-		-4,
 		NaN,
 		true,
 		false,
 		null,
-		void 0
+		void 0,
+		-6,
+		7.25
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		bool = isCubeNumber.isObject( values[ i % values.length ] );
+		if ( typeof bool !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( bool ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( pkg+'::objects:isObject,true', function benchmark( b ) {
+	var values;
+	var bool;
+	var i;
+
+	values = [
+		new Number( 8 ),
+		new Number( 64 ),
+		new Number( 1 ),
+		new Number( -27 ),
+		new Number( -8 ),
+		new Number( 125 ),
+		new Number( -1000 ),
+		new Number( 27 )
 	];
 
 	b.tic();
@@ -202,19 +313,20 @@ bench( pkg+'::primitives:isObject', function benchmark( b ) {
 	b.end();
 });
 
-bench( pkg+'::objects:isObject', function benchmark( b ) {
+bench( pkg+'::objects:isObject,false', function benchmark( b ) {
 	var values;
 	var bool;
 	var i;
 
 	values = [
+		new Number( 5 ),
+		new Number( NaN ),
+		new Number( 3.14 ),
+		new Number( -6 ),
+		new Number( 7.25 ),
 		[],
 		{},
-		function noop() {},
-		new Number( 8.0 ),
-		new Number( 0.5 ),
-		new Number( NaN ),
-		new Number( 3.14 )
+		function noop() {}
 	];
 
 	b.tic();