diff --git a/lib/node_modules/@stdlib/stats/base/ndarray/dcovarmtk/benchmark/benchmark.js b/lib/node_modules/@stdlib/stats/base/ndarray/dcovarmtk/benchmark/benchmark.js
index 328e66c61d31..2281fbead569 100644
--- a/lib/node_modules/@stdlib/stats/base/ndarray/dcovarmtk/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/stats/base/ndarray/dcovarmtk/benchmark/benchmark.js
@@ -22,6 +22,7 @@
 
 var bench = require( '@stdlib/bench' );
 var uniform = require( '@stdlib/random/array/uniform' );
+var format = require( '@stdlib/string/format' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var ndarray = require( '@stdlib/ndarray/base/ctor' );
@@ -114,7 +115,7 @@ 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 );
 	}
 }