diff --git a/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.js
index 51f974a28860..e33b333877bc 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.js
@@ -27,6 +27,7 @@ var filledarrayBy = require( '@stdlib/array/filled-by' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var Float64Array = require( '@stdlib/array/float64' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var dnannsum = require( './../lib/dnannsum.js' );
 
@@ -107,7 +108,7 @@ 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 );
 	}
 }
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.native.js
index 7aa125519eae..90603fd4db5e 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.native.js
@@ -29,6 +29,7 @@ var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var Float64Array = require( '@stdlib/array/float64' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -116,7 +117,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg+'::native:len='+len, opts, f );
+		bench( format( '%s::native:len=%d', pkg, len ), opts, f );
 	}
 }
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.ndarray.js b/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.ndarray.js
index 02765b380193..f918bec51534 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.ndarray.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.ndarray.js
@@ -27,6 +27,7 @@ var filledarrayBy = require( '@stdlib/array/filled-by' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var Float64Array = require( '@stdlib/array/float64' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var dnannsum = require( './../lib/ndarray.js' );
 
@@ -107,7 +108,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg+':ndarray:len='+len, f );
+		bench( format( '%s:ndarray:len=%d', pkg, len ), f );
 	}
 }
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.ndarray.native.js b/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.ndarray.native.js
index 3115781fabba..1097cdd05dd8 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.ndarray.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/dnannsum/benchmark/benchmark.ndarray.native.js
@@ -29,6 +29,7 @@ var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var Float64Array = require( '@stdlib/array/float64' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -116,7 +117,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg+'::native:ndarray:len='+len, opts, f );
+		bench( format( '%s::native:ndarray:len=%d', pkg, len ), opts, f );
 	}
 }