diff --git a/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.dznrm2.js b/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.dznrm2.js
index 55e09894826e..584f1f96ef7a 100644
--- a/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.dznrm2.js
+++ b/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.dznrm2.js
@@ -22,40 +22,10 @@
 
 var tape = require( 'tape' );
 var Complex128Array = require( '@stdlib/array/complex128' );
-var EPS = require( '@stdlib/constants/float64/eps' );
-var abs = require( '@stdlib/math/base/special/abs' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var dznrm2 = require( './../lib/dznrm2.js' );
 
 
-// FUNCTIONS //
-
-/**
-* Tests for element-wise approximate equality.
-*
-* @private
-* @param {Object} t - test object
-* @param {Collection} actual - actual values
-* @param {Collection} expected - expected values
-* @param {number} rtol - relative tolerance
-*/
-function isApprox( t, actual, expected, rtol ) {
-	var delta;
-	var tol;
-	var i;
-
-	t.strictEqual( actual.length, expected.length, 'returns expected value' );
-	for ( i = 0; i < expected.length; i++ ) {
-		if ( actual[ i ] === expected[ i ] ) {
-			t.strictEqual( actual[ i ], expected[ i ], 'returns expected value' );
-		} else {
-			delta = abs( actual[ i ] - expected[ i ] );
-			tol = rtol * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. actual: '+actual[ i ]+'. expected: '+expected[ i ]+'. delta: '+delta+'. tol: '+tol+'.' );
-		}
-	}
-}
-
-
 // TESTS //
 
 tape( 'main export is a function', function test( t ) {
@@ -89,7 +59,7 @@ tape( 'the function computes the L2-norm', function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, 1 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 
 	x = new Complex128Array([
 		0.1,  // 1
@@ -104,7 +74,7 @@ tape( 'the function computes the L2-norm', function test( t ) {
 	expected = 0.7;
 
 	actual = dznrm2( 3, x, 1 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -153,7 +123,7 @@ tape( 'the function supports specifying a stride', function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, 2 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -183,7 +153,7 @@ tape( 'the function supports specifying a negative stride', function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, -2 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -205,11 +175,11 @@ tape( 'the function supports view offsets', function test( t ) {
 		9.0,
 		10.0
 	]);
-	expected = 14.1;
+	expected = 14.106735979665885;
 
 	x1 = new Complex128Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 );
 
 	actual = dznrm2( 3, x1, 1 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.dznrm2.native.js b/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.dznrm2.native.js
index 9d2154201d32..75ceb8ab40be 100644
--- a/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.dznrm2.native.js
+++ b/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.dznrm2.native.js
@@ -23,8 +23,7 @@
 var resolve = require( 'path' ).resolve;
 var tape = require( 'tape' );
 var Complex128Array = require( '@stdlib/array/complex128' );
-var EPS = require( '@stdlib/constants/float64/eps' );
-var abs = require( '@stdlib/math/base/special/abs' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 
 
@@ -36,35 +35,6 @@ var opts = {
 };
 
 
-// FUNCTIONS //
-
-/**
-* Tests for element-wise approximate equality.
-*
-* @private
-* @param {Object} t - test object
-* @param {Collection} actual - actual values
-* @param {Collection} expected - expected values
-* @param {number} rtol - relative tolerance
-*/
-function isApprox( t, actual, expected, rtol ) {
-	var delta;
-	var tol;
-	var i;
-
-	t.strictEqual( actual.length, expected.length, 'returns expected value' );
-	for ( i = 0; i < expected.length; i++ ) {
-		if ( actual[ i ] === expected[ i ] ) {
-			t.strictEqual( actual[ i ], expected[ i ], 'returns expected value' );
-		} else {
-			delta = abs( actual[ i ] - expected[ i ] );
-			tol = rtol * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. actual: '+actual[ i ]+'. expected: '+expected[ i ]+'. delta: '+delta+'. tol: '+tol+'.' );
-		}
-	}
-}
-
-
 // TESTS //
 
 tape( 'main export is a function', opts, function test( t ) {
@@ -98,7 +68,7 @@ tape( 'the function computes the L2-norm', opts, function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, 1 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 
 	x = new Complex128Array([
 		0.1,  // 1
@@ -113,7 +83,7 @@ tape( 'the function computes the L2-norm', opts, function test( t ) {
 	expected = 0.7;
 
 	actual = dznrm2( 3, x, 1 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -162,7 +132,7 @@ tape( 'the function supports specifying a stride', opts, function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, 2 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -192,7 +162,7 @@ tape( 'the function supports specifying a negative stride', opts, function test(
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, -2 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -214,11 +184,11 @@ tape( 'the function supports view offsets', opts, function test( t ) {
 		9.0,
 		10.0
 	]);
-	expected = 14.1;
+	expected = 14.106735979665885;
 
 	x1 = new Complex128Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 );
 
 	actual = dznrm2( 3, x1, 1 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.ndarray.js b/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.ndarray.js
index 658a5694c5ba..c60203f04721 100644
--- a/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.ndarray.js
+++ b/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.ndarray.js
@@ -22,40 +22,10 @@
 
 var tape = require( 'tape' );
 var Complex128Array = require( '@stdlib/array/complex128' );
-var EPS = require( '@stdlib/constants/float64/eps' );
-var abs = require( '@stdlib/math/base/special/abs' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var dznrm2 = require( './../lib/ndarray.js' );
 
 
-// FUNCTIONS //
-
-/**
-* Tests for element-wise approximate equality.
-*
-* @private
-* @param {Object} t - test object
-* @param {Collection} actual - actual values
-* @param {Collection} expected - expected values
-* @param {number} rtol - relative tolerance
-*/
-function isApprox( t, actual, expected, rtol ) {
-	var delta;
-	var tol;
-	var i;
-
-	t.strictEqual( actual.length, expected.length, 'returns expected value' );
-	for ( i = 0; i < expected.length; i++ ) {
-		if ( actual[ i ] === expected[ i ] ) {
-			t.strictEqual( actual[ i ], expected[ i ], 'returns expected value' );
-		} else {
-			delta = abs( actual[ i ] - expected[ i ] );
-			tol = rtol * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. actual: '+actual[ i ]+'. expected: '+expected[ i ]+'. delta: '+delta+'. tol: '+tol+'.' );
-		}
-	}
-}
-
-
 // TESTS //
 
 tape( 'main export is a function', function test( t ) {
@@ -89,7 +59,7 @@ tape( 'the function computes the L2-norm', function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 
 	x = new Complex128Array([
 		0.1,  // 1
@@ -104,7 +74,7 @@ tape( 'the function computes the L2-norm', function test( t ) {
 	expected = 0.7;
 
 	actual = dznrm2( 3, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 
 	// Checked on Wolfram Alpha:
 	x = new Complex128Array([
@@ -117,10 +87,10 @@ tape( 'the function computes the L2-norm', function test( t ) {
 		1e150,  // 4
 		1e150   // 4
 	]);
-	expected = 2.82842e+150;
+	expected = 2.82842712474619e+150;
 
 	actual = dznrm2( 4, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 
 	// Checked on Wolfram Alpha:
 	x = new Complex128Array([
@@ -133,10 +103,10 @@ tape( 'the function computes the L2-norm', function test( t ) {
 		1e-155,  // 4
 		1e-155   // 4
 	]);
-	expected = 2.82843e-155;
+	expected = 2.82842712474619e-155;
 
 	actual = dznrm2( 4, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 
 	// Checked on Wolfram Alpha:
 	x = new Complex128Array([
@@ -152,7 +122,7 @@ tape( 'the function computes the L2-norm', function test( t ) {
 	expected = 2.00000e150;
 
 	actual = dznrm2( 4, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 
 	// Checked on Wolfram Alpha:
 	x = new Complex128Array([
@@ -168,7 +138,7 @@ tape( 'the function computes the L2-norm', function test( t ) {
 	expected = 2.00000e50;
 
 	actual = dznrm2( 4, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 
 	// Checked on Wolfram Alpha:
 	x = new Complex128Array([
@@ -181,10 +151,10 @@ tape( 'the function computes the L2-norm', function test( t ) {
 		1.4e-154,                // 4
 		0                        // 4
 	]);
-	expected = 3.51283e-154;
+	expected = 3.512833614050059e-154;
 
 	actual = dznrm2( 4, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -233,7 +203,7 @@ tape( 'the function supports specifying a stride', function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, 2, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -263,7 +233,7 @@ tape( 'the function supports specifying a negative stride', function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, -2, 6 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -284,9 +254,9 @@ tape( 'the function supports specifying an offset', function test( t ) {
 		9.0,
 		10.0
 	]);
-	expected = 14.1;
+	expected = 14.106735979665885;
 
 	actual = dznrm2( 3, x, 1, 1 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 0 ), true, 'returns expected value' );
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.ndarray.native.js b/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.ndarray.native.js
index 6260c87e9033..1b131fd2c382 100644
--- a/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.ndarray.native.js
+++ b/lib/node_modules/@stdlib/blas/base/dznrm2/test/test.ndarray.native.js
@@ -23,8 +23,7 @@
 var resolve = require( 'path' ).resolve;
 var tape = require( 'tape' );
 var Complex128Array = require( '@stdlib/array/complex128' );
-var EPS = require( '@stdlib/constants/float64/eps' );
-var abs = require( '@stdlib/math/base/special/abs' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var tryRequire = require( '@stdlib/utils/try-require' );
 
 
@@ -36,35 +35,6 @@ var opts = {
 };
 
 
-// FUNCTIONS //
-
-/**
-* Tests for element-wise approximate equality.
-*
-* @private
-* @param {Object} t - test object
-* @param {Collection} actual - actual values
-* @param {Collection} expected - expected values
-* @param {number} rtol - relative tolerance
-*/
-function isApprox( t, actual, expected, rtol ) {
-	var delta;
-	var tol;
-	var i;
-
-	t.strictEqual( actual.length, expected.length, 'returns expected value' );
-	for ( i = 0; i < expected.length; i++ ) {
-		if ( actual[ i ] === expected[ i ] ) {
-			t.strictEqual( actual[ i ], expected[ i ], 'returns expected value' );
-		} else {
-			delta = abs( actual[ i ] - expected[ i ] );
-			tol = rtol * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. actual: '+actual[ i ]+'. expected: '+expected[ i ]+'. delta: '+delta+'. tol: '+tol+'.' );
-		}
-	}
-}
-
-
 // TESTS //
 
 tape( 'main export is a function', opts, function test( t ) {
@@ -98,7 +68,7 @@ tape( 'the function computes the L2-norm', opts, function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 
 	x = new Complex128Array([
 		0.1,  // 1
@@ -113,7 +83,7 @@ tape( 'the function computes the L2-norm', opts, function test( t ) {
 	expected = 0.7;
 
 	actual = dznrm2( 3, x, 1, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -162,7 +132,7 @@ tape( 'the function supports specifying a stride', opts, function test( t ) {
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, 2, 0 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -192,7 +162,7 @@ tape( 'the function supports specifying a negative stride', opts, function test(
 	expected = 0.8;
 
 	actual = dznrm2( 4, x, -2, 6 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -213,9 +183,9 @@ tape( 'the function supports specifying an offset', opts, function test( t ) {
 		9.0,
 		10.0
 	]);
-	expected = 14.1;
+	expected = 14.106735979665885;
 
 	actual = dznrm2( 3, x, 1, 1 );
-	isApprox( t, actual, expected, 2.0 );
+	t.strictEqual( isAlmostSameValue( actual, expected, 1 ), true, 'returns expected value' );
 	t.end();
 });