diff --git a/lib/node_modules/@stdlib/utils/is-capitalized/test/test.js b/lib/node_modules/@stdlib/utils/is-capitalized/test/test.js
index 9001a4a1571..23d1997cdd0 100644
--- a/lib/node_modules/@stdlib/utils/is-capitalized/test/test.js
+++ b/lib/node_modules/@stdlib/utils/is-capitalized/test/test.js
@@ -26,7 +26,7 @@ tape( 'the function returns `true` if provided a string having an uppercase firs
 
 	for ( i = 0; i < values.length; i++ ) {
 		bool = isCapitalized( values[ i ] );
-		t.equal( bool, true, 'returns true when provided '+values[ i ] );
+		t.strictEqual( bool, true, 'returns true when provided '+values[ i ] );
 	}
 	t.end();
 });
@@ -53,7 +53,7 @@ tape( 'the function returns `false` if not provided a string having an uppercase
 	];
 
 	for ( i = 0; i < values.length; i++ ) {
-		t.equal( isCapitalized( values[i] ), false, 'returns false when provided '+values[i] );
+		t.strictEqual( isCapitalized( values[i] ), false, 'returns false when provided '+values[i] );
 	}
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/utils/is-lowercase/test/test.js b/lib/node_modules/@stdlib/utils/is-lowercase/test/test.js
index a3f62fdf3b9..52766613df4 100644
--- a/lib/node_modules/@stdlib/utils/is-lowercase/test/test.js
+++ b/lib/node_modules/@stdlib/utils/is-lowercase/test/test.js
@@ -26,7 +26,7 @@ tape( 'the function returns `true` if provided a lowercase string', function tes
 
 	for ( i = 0; i < values.length; i++ ) {
 		bool = isLowercase( values[ i ] );
-		t.equal( bool, true, 'returns true when provided '+values[ i ] );
+		t.strictEqual( bool, true, 'returns true when provided '+values[ i ] );
 	}
 	t.end();
 });
@@ -53,7 +53,7 @@ tape( 'the function returns `false` if not provided a lowercase string', functio
 	];
 
 	for ( i = 0; i < values.length; i++ ) {
-		t.equal( isLowercase( values[i] ), false, 'returns false when provided '+values[i] );
+		t.strictEqual( isLowercase( values[i] ), false, 'returns false when provided '+values[i] );
 	}
 	t.end();
 });
diff --git a/lib/node_modules/@stdlib/utils/is-uppercase/test/test.js b/lib/node_modules/@stdlib/utils/is-uppercase/test/test.js
index 0550a162d04..33e84c018b1 100644
--- a/lib/node_modules/@stdlib/utils/is-uppercase/test/test.js
+++ b/lib/node_modules/@stdlib/utils/is-uppercase/test/test.js
@@ -26,7 +26,7 @@ tape( 'the function returns `true` if provided an uppercase string', function te
 
 	for ( i = 0; i < values.length; i++ ) {
 		bool = isUppercase( values[ i ] );
-		t.equal( bool, true, 'returns true when provided '+values[ i ] );
+		t.strictEqual( bool, true, 'returns true when provided '+values[ i ] );
 	}
 	t.end();
 });
@@ -53,7 +53,7 @@ tape( 'the function returns `false` if not provided an uppercase string', functi
 	];
 
 	for ( i = 0; i < values.length; i++ ) {
-		t.equal( isUppercase( values[i] ), false, 'returns false when provided '+values[i] );
+		t.strictEqual( isUppercase( values[i] ), false, 'returns false when provided '+values[i] );
 	}
 	t.end();
 });