You may see tests on your dashboard that you don't feel comfortable completing. For example, you may not have access to the required browser or it may be a test you've taken before.
To decline a test, click the tick box to the left of it.
You can select individual tests, or Select All tests.
Then, click Decline Tests.
You'll see a popup modal asking you if you'd like to decline the selected tests. Click Yes and the test will be removed from your Available Tests tab.