diff --git a/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.js
index 11b97e05cc4e..d7445997a281 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.js
@@ -27,6 +27,7 @@ var real = require( '@stdlib/complex/float64/real' );
 var imag = require( '@stdlib/complex/float64/imag' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var zsumkbn = require( './../lib/zsumkbn.js' );
 
@@ -98,7 +99,7 @@ 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/zsumkbn/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.native.js
index e343ebf28283..f799dd611e73 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.native.js
@@ -29,6 +29,7 @@ var imag = require( '@stdlib/complex/float64/imag' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -103,7 +104,7 @@ 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/zsumkbn/benchmark/benchmark.ndarray.js b/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.ndarray.js
index dd3e98c90dd6..97740330ded6 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.ndarray.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.ndarray.js
@@ -27,6 +27,7 @@ var real = require( '@stdlib/complex/float64/real' );
 var imag = require( '@stdlib/complex/float64/imag' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var zsumkbn = require( './../lib/ndarray.js' );
 
@@ -98,7 +99,7 @@ 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/zsumkbn/benchmark/benchmark.ndarray.native.js b/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.ndarray.native.js
index ff9e63af2ee6..faace80f8c87 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.ndarray.native.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/zsumkbn/benchmark/benchmark.ndarray.native.js
@@ -29,6 +29,7 @@ var imag = require( '@stdlib/complex/float64/imag' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -103,7 +104,7 @@ 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 );
 	}
 }