diff --git a/src/core-components/__tests__/button-test.js b/src/core-components/__tests__/button-test.js
index 5e6154b5..0d5f14ba 100644
--- a/src/core-components/__tests__/button-test.js
+++ b/src/core-components/__tests__/button-test.js
@@ -3,33 +3,34 @@ jest.dontMock('../button.js');
 import React from 'react/addons';
 import Button from '../button.js';
 
-var TestUtils = React.addons.TestUtils;
+let TestUtils = React.addons.TestUtils;
 
-describe('Button', () => {
-	it('should render children', () => {
-		var button = TestUtils.renderIntoDocument(
-			<Button>
-				testcontent
-			</Button>
-		);
+describe('Button', function () {
+    it('should render children', function () {
+        let button = TestUtils.renderIntoDocument(
+            <Button>
+                testcontent
+            </Button>
+        );
 
-		expect(button.getDOMNode().textContent).toEqual('testcontent');
-	});
+        expect(button.getDOMNode().textContent).toEqual('testcontent');
+    });
 
-	it('should add passed types to class', () => {
-		var types = [
-			'primary',
+    it('should add passed types to class', function () {
+        let types = [
+            'primary',
             'clean',
             'link'
-		];
+        ];
 
-		types.forEach((type) => {
-			var button = TestUtils.renderIntoDocument(
-				<Button type={type}>
-					testcontent
-				</Button>
-			);
-			expect(button.getDOMNode().getAttribute('class')).toContain('button-' + type);
-		});
-	});
-});
\ No newline at end of file
+        types.forEach(function (type) {
+            let button = TestUtils.renderIntoDocument(
+                <Button type={type}>
+                    testcontent
+                </Button>
+            );
+
+            expect(button.getDOMNode().getAttribute('class')).toContain('button-' + type);
+        });
+    });
+});
diff --git a/src/core-components/__tests__/form-test.js b/src/core-components/__tests__/form-test.js
index 83f6851b..3eda4d3d 100644
--- a/src/core-components/__tests__/form-test.js
+++ b/src/core-components/__tests__/form-test.js
@@ -5,10 +5,10 @@ import React from 'react/addons';
 import Form from 'core-components/form.js';
 import Input from 'core-components/input.js';
 
-var TestUtils = React.addons.TestUtils;
+let TestUtils = React.addons.TestUtils;
 
-describe('Form', () => {
-    var results = TestUtils.renderIntoDocument(
+describe('Form', function () {
+    let results = TestUtils.renderIntoDocument(
         <Form onSubmit={jest.genMockFunction()}>
             <div>
                 <Input name="first" value="value1"/>
@@ -17,9 +17,9 @@ describe('Form', () => {
             <Input name="third" value="value3" />
         </Form>
     );
-    var inputs = TestUtils.scryRenderedComponentsWithType(results, Input);
+    let inputs = TestUtils.scryRenderedComponentsWithType(results, Input);
 
-    it('should store input value in form state', () => {
+    it('should store input value in form state', function () {
         expect(results.state.form).toEqual({
             first: 'value1',
             second: 'value2',
@@ -27,7 +27,7 @@ describe('Form', () => {
         });
     });
 
-    it('should update form state if an input value changes', () => {
+    it('should update form state if an input value changes', function () {
         inputs[0].props.onChange({ target: {value: 'value4'}});
 
         expect(results.state.form).toEqual({
@@ -37,7 +37,7 @@ describe('Form', () => {
         });
     });
 
-    it('should update input value if state value changes', () => {
+    it('should update input value if state value changes', function () {
         results.setState({
             form: {
                 first: 'value6',
@@ -51,7 +51,7 @@ describe('Form', () => {
         expect(inputs[2].props.value).toEqual('value8');
     });
 
-    it('should call onSubmit callback when form is submitted', () => {
+    it('should call onSubmit callback when form is submitted', function () {
         TestUtils.Simulate.submit(results.getDOMNode());
 
         expect(results.props.onSubmit).toBeCalledWith(results.state.form);