diff --git a/test/components/CircularProgressbar.spec.js b/test/components/CircularProgressbar.spec.js
index 2b3b820..5896bc1 100644
--- a/test/components/CircularProgressbar.spec.js
+++ b/test/components/CircularProgressbar.spec.js
@@ -1,9 +1,30 @@
 import React from 'react';
 import { assert } from 'chai';
+import { shallow } from 'enzyme';
+
 import CircularProgressbar from '../../src';
 
 describe('CircularProgressbar', () => {
   it('should not throw exceptions in base case', () => {
     assert.doesNotThrow(() => <CircularProgressbar />);
   });
+
+  it('should render as an svg', () => {
+    const wrapper = shallow(
+      <CircularProgressbar percentage={50} />
+    );
+    assert.equal(1, wrapper.find('svg').length);
+  });
+});
+
+describe('CircularProgressbar props', () => {
+  it('strokeWidth', () => {
+    const wrapper = shallow(
+      <CircularProgressbar
+        percentage={50}
+        strokeWidth={2}
+      />
+    );
+    assert.equal(2, wrapper.find('.CircularProgressbar-path').prop('strokeWidth'));
+  });
 });