diff --git a/test/15-conversions.spec.coffee b/test/15-conversions.spec.coffee
deleted file mode 100644
index 812aefee..00000000
--- a/test/15-conversions.spec.coffee
+++ /dev/null
@@ -1,52 +0,0 @@
-{ expect } = require './lib/chai-config'
-
-conversion = require '../src/lib/conversions'
-
-describe 'conversions', ->
-
-	describe 'envArrayToObject', ->
-		it 'should convert an env array to an object', ->
-			expect(conversion.envArrayToObject([
-				'key=value'
-				'test1=test2'
-				'k=v'
-				'equalsvalue=thisvaluehasan=char'
-				'asd='
-				'number=123'
-			])).to.deep.equal({
-				key: 'value'
-				test1: 'test2'
-				k: 'v'
-				equalsvalue: 'thisvaluehasan=char'
-				asd: ''
-				number: '123'
-			})
-
-		it 'should ignore invalid env array entries', ->
-			expect(conversion.envArrayToObject([
-				'key1',
-				'key1=value1'
-			])).to.deep.equal({
-				key1: 'value1'
-			})
-
-		it 'should return an empty object with an empty input', ->
-			expect(conversion.envArrayToObject(null)).to.deep.equal({})
-			expect(conversion.envArrayToObject('')).to.deep.equal({})
-			expect(conversion.envArrayToObject([])).to.deep.equal({})
-			expect(conversion.envArrayToObject(1)).to.deep.equal({})
-
-	it 'should correctly handle whitespace', ->
-		expect(conversion.envArrayToObject([
-			'key1= test',
-			'key2=test\ntest',
-			'key3=test ',
-			'key4= test '
-			'key5=test\r\ntest',
-		])).to.deep.equal({
-			key1: ' test',
-			key2: 'test\ntest',
-			key3: 'test ',
-			key4: ' test ',
-			key5: 'test\r\ntest'
-		})
diff --git a/test/15-conversions.spec.js b/test/15-conversions.spec.js
new file mode 100644
index 00000000..8387d600
--- /dev/null
+++ b/test/15-conversions.spec.js
@@ -0,0 +1,59 @@
+import { expect } from './lib/chai-config';
+import * as conversion from '../src/lib/conversions';
+
+describe('conversions', function() {
+	describe('envArrayToObject', function() {
+		it('should convert an env array to an object', () =>
+			expect(
+				conversion.envArrayToObject([
+					'key=value',
+					'test1=test2',
+					'k=v',
+					'equalsvalue=thisvaluehasan=char',
+					'asd=',
+					'number=123',
+				]),
+			).to.deep.equal({
+				key: 'value',
+				test1: 'test2',
+				k: 'v',
+				equalsvalue: 'thisvaluehasan=char',
+				asd: '',
+				number: '123',
+			}));
+
+		it('should ignore invalid env array entries', () =>
+			expect(
+				conversion.envArrayToObject(['key1', 'key1=value1']),
+			).to.deep.equal({
+				key1: 'value1',
+			}));
+
+		it('should return an empty object with an empty input', function() {
+			// @ts-ignore passing invalid value to test
+			expect(conversion.envArrayToObject(null)).to.deep.equal({});
+			// @ts-ignore passing invalid value to test
+			expect(conversion.envArrayToObject('')).to.deep.equal({});
+			expect(conversion.envArrayToObject([])).to.deep.equal({});
+			// @ts-ignore passing invalid value to test
+			expect(conversion.envArrayToObject(1)).to.deep.equal({});
+		});
+	});
+
+	it('should correctly handle whitespace', () =>
+		expect(
+			conversion.envArrayToObject([
+				'key1= test',
+				'key2=test\ntest',
+				'key3=test ',
+				'key4= test ',
+				'key5=test\r\ntest',
+			]),
+		).to.deep.equal({
+			key1: ' test',
+			key2: 'test\ntest',
+			key3: 'test ',
+			key4: ' test ',
+			key5: 'test\r\ntest',
+		}));
+});