diff --git a/test/binomialCoefficient.test.js b/test/binomialCoefficient.test.js
index 894c006bd..1e6d8003f 100644
--- a/test/binomialCoefficient.test.js
+++ b/test/binomialCoefficient.test.js
@@ -13,6 +13,12 @@ test('Returns the appropriate value', () => {
 test('Returns the appropriate value', () => {
   expect(binomialCoefficient(5, 3)).toBe(10);
 });
+test('Returns the appropriate value', () => {
+  expect(binomialCoefficient(8, -1)).toBe(0);
+});
+test('Returns the appropriate value', () => {
+  expect(binomialCoefficient(8, 1)).toBe(8);
+});
 test('Returns NaN', () => {
   expect(Number.isNaN(binomialCoefficient(NaN, 3))).toBeTruthy();
 });
diff --git a/test/colorize.test.js b/test/colorize.test.js
index 8e147ef2e..4e9e17dc7 100644
--- a/test/colorize.test.js
+++ b/test/colorize.test.js
@@ -4,3 +4,6 @@ const {colorize} = require('./_30s.js');
 test('colorize is a Function', () => {
   expect(colorize).toBeInstanceOf(Function);
 });
+test('Returns the appropriate value', () => {
+  expect(colorize('x').black).toBe('\x1b[30mx');
+});