diff --git a/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.js
index 17df395a7139..a002be3b5ad8 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/zfill/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 Complex128Array = require( '@stdlib/array/complex128' );
 var Complex128 = require( '@stdlib/complex/float64/ctor' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var zfill = require( './../lib/zfill.js' );
 
@@ -99,7 +100,7 @@ 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/zfill/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.native.js
index 33e22fd21d78..4a739d18907e 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.native.js
@@ -28,6 +28,7 @@ var pow = require( '@stdlib/math/base/special/pow' );
 var Complex128Array = require( '@stdlib/array/complex128' );
 var Complex128 = require( '@stdlib/complex/float64/ctor' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -109,7 +110,7 @@ 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/zfill/benchmark/benchmark.ndarray.js b/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.ndarray.js
index 0d7493b8e8a7..a260445b3d2a 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.ndarray.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/zfill/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 Complex128Array = require( '@stdlib/array/complex128' );
 var Complex128 = require( '@stdlib/complex/float64/ctor' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var zfill = require( './../lib/ndarray.js' );
 
@@ -104,7 +105,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg+':ndarray:len='+len, f );
+		bench( format( '%s:len=%d', pkg, len ), f );
 	}
 }
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.ndarray.native.js b/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.ndarray.native.js
index 28ff232576b0..3e848fdb2e7e 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.ndarray.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/zfill/benchmark/benchmark.ndarray.native.js
@@ -28,6 +28,7 @@ var pow = require( '@stdlib/math/base/special/pow' );
 var Complex128Array = require( '@stdlib/array/complex128' );
 var Complex128 = require( '@stdlib/complex/float64/ctor' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -109,7 +110,7 @@ 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 );
 	}
 }