diff --git a/lib/node_modules/@stdlib/array/base/cusome-by/benchmark/benchmark.assign.length.js b/lib/node_modules/@stdlib/array/base/cusome-by/benchmark/benchmark.assign.length.js
index f69c802a58f8..e31e03ff34cb 100644
--- a/lib/node_modules/@stdlib/array/base/cusome-by/benchmark/benchmark.assign.length.js
+++ b/lib/node_modules/@stdlib/array/base/cusome-by/benchmark/benchmark.assign.length.js
@@ -25,6 +25,7 @@ var pow = require( '@stdlib/math/base/special/pow' );
 var isArray = require( '@stdlib/assert/is-array' );
 var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' ).isPrimitive;
 var filled = require( '@stdlib/array/base/filled' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var cusomeBy = require( './../lib' );
 
@@ -92,7 +93,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg+':assign:len='+len, f );
+		bench( format( '%s:assign:len=%d', pkg, len ), f );
 	}
 }
 
diff --git a/lib/node_modules/@stdlib/array/base/cusome-by/benchmark/benchmark.length.js b/lib/node_modules/@stdlib/array/base/cusome-by/benchmark/benchmark.length.js
index 4ea48252860f..acfc337ab95d 100644
--- a/lib/node_modules/@stdlib/array/base/cusome-by/benchmark/benchmark.length.js
+++ b/lib/node_modules/@stdlib/array/base/cusome-by/benchmark/benchmark.length.js
@@ -25,6 +25,7 @@ var pow = require( '@stdlib/math/base/special/pow' );
 var isArray = require( '@stdlib/assert/is-array' );
 var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' );
 var filled = require( '@stdlib/array/base/filled' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var cusomeBy = require( './../lib' );
 
@@ -89,7 +90,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg+':len='+len, f );
+		bench( format( '%s:len=%d', pkg, len ), f );
 	}
 }