diff --git a/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.js
index 8cec4ce5f6e3..821c3a83c309 100644
--- a/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.js
@@ -26,6 +26,7 @@ var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var Complex64Array = require( '@stdlib/array/complex64' );
 var reinterpret = require( '@stdlib/strided/base/reinterpret-complex64' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var ccopy = require( './../lib/ccopy.js' );
 
@@ -108,7 +109,7 @@ 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/base/ccopy/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.native.js
index 6c4e99a041f7..6cb84989a92f 100644
--- a/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.native.js
+++ b/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.native.js
@@ -28,6 +28,7 @@ var pow = require( '@stdlib/math/base/special/pow' );
 var Complex64Array = require( '@stdlib/array/complex64' );
 var reinterpret = require( '@stdlib/strided/base/reinterpret-complex64' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -113,7 +114,7 @@ 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/base/ccopy/benchmark/benchmark.ndarray.js b/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.ndarray.js
index 2a96afec67ec..907557ed02e7 100644
--- a/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.ndarray.js
+++ b/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.ndarray.js
@@ -26,6 +26,7 @@ var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var Complex64Array = require( '@stdlib/array/complex64' );
 var reinterpret = require( '@stdlib/strided/base/reinterpret-complex64' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var ccopy = require( './../lib/ndarray.js' );
 
@@ -108,7 +109,7 @@ 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/base/ccopy/benchmark/benchmark.ndarray.native.js b/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.ndarray.native.js
index c539cc9a2ab1..09ec3ec39287 100644
--- a/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.ndarray.native.js
+++ b/lib/node_modules/@stdlib/blas/base/ccopy/benchmark/benchmark.ndarray.native.js
@@ -28,6 +28,7 @@ var pow = require( '@stdlib/math/base/special/pow' );
 var Complex64Array = require( '@stdlib/array/complex64' );
 var reinterpret = require( '@stdlib/strided/base/reinterpret-complex64' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -113,7 +114,7 @@ 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 );
 	}
 }