diff --git a/lib/node_modules/@stdlib/stats/base/dists/gumbel/cdf/benchmark/benchmark.js b/lib/node_modules/@stdlib/stats/base/dists/gumbel/cdf/benchmark/benchmark.js
index 3669fe652a5c..440279bdd147 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/gumbel/cdf/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/gumbel/cdf/benchmark/benchmark.js
@@ -24,6 +24,7 @@ var bench = require( '@stdlib/bench' );
 var Float64Array = require( '@stdlib/array/float64' );
 var uniform = require( '@stdlib/random/base/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var format = require( '@stdlib/string/format' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var pkg = require( './../package.json' ).name;
 var cdf = require( './../lib' );
@@ -64,7 +65,7 @@ bench( pkg, function benchmark( b ) {
 	b.end();
 });
 
-bench( pkg+':factory', function benchmark( b ) {
+bench( format( '%s::factory', pkg ), function benchmark( b ) {
 	var mycdf;
 	var beta;
 	var len;
diff --git a/lib/node_modules/@stdlib/stats/base/dists/gumbel/cdf/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/stats/base/dists/gumbel/cdf/benchmark/benchmark.native.js
index 3fb96c5e6569..200586e8cdfd 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/gumbel/cdf/benchmark/benchmark.native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/gumbel/cdf/benchmark/benchmark.native.js
@@ -25,6 +25,7 @@ var bench = require( '@stdlib/bench' );
 var Float64Array = require( '@stdlib/array/float64' );
 var uniform = require( '@stdlib/random/base/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var format = require( '@stdlib/string/format' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 var pkg = require( './../package.json' ).name;
@@ -40,7 +41,7 @@ var opts = {
 
 // MAIN //
 
-bench( pkg+'::native', opts, function benchmark( b ) {
+bench( format( '%s::native', pkg ), opts, function benchmark( b ) {
 	var beta;
 	var len;
 	var mu;