The Fast Stream online tests, explained
Your first assessment after you apply to the Civil Service Fast Stream is a pair of online tests: work-based scenarios and the case study assessment. This guide sets out exactly what each test asks of you, how long you have and what happens to your results, straight from the official Fast Stream pages.
The two tests at a glance
| Test | What you do | Size | What it measures |
|---|---|---|---|
| Work-based scenarios | Watch short videos of work situations and rate how effective several possible actions would be | 12 scenarios | Interpersonal skills |
| Case study assessment | Take on an imaginary role, review background information, then respond to a series of challenges | 7 pieces of background information, 24 situations | Decision-making and your ability to adapt to changing circumstances |
Both descriptions come from the Online tests page on Civil Service Careers, the official Fast Stream site.
When the tests arrive
Once you submit your application, your online tests open on your applicant homepage. Civil Service Careers explains that you may wait a few days for them to become available, especially in busy periods, and that you receive an email the moment they are ready.
From that moment you have 7 days to complete them, and your applicant homepage shows the exact deadline. For 2027 entry the application window runs from midday on 8 October 2026 to midday on 5 November 2026, so your test week follows within days of the application you send.
Test 1: work-based scenarios
This test measures interpersonal skills. You watch short videos of work situations and, for each of the 12 scenarios, rate the effectiveness of several possible actions on a four-point scale:
- Counterproductive: an unacceptable action that would make the problem worse
- Ineffective: a poor action that would not help
- Partially effective: a useful action that would be of some help
- Effective: a good action that would help resolve the situation
Civil Service Careers publishes a worked example of a work-based scenario in writing, with one situation, four actions and the correct rating and explanation for each. The real test uses video and audio; the judgement you make is the same. Our situational judgement tips show how strong candidates work through it.
Test 2: the case study assessment
The case study assesses your decision-making and your ability to adapt to changing circumstances. You take on an imaginary role, review background information and respond to a series of challenges. It is an evolving scenario: 7 pieces of background information, followed by 24 situations.
Two answer types run through it. In some situations you identify the most effective and the least effective response. In others you rate several possible actions on the same four-point scale as the work-based scenarios. Our case study guide covers how to read the documents and keep track as the case moves on.
Timing: no clock, about 90 minutes in total
Neither test is timed, so you work at your own pace. The official Fast Stream assessment guide says the two tests should take you around one and a half hours in total and reminds you that you do not need to rush your answers. The only hard limit is the 7-day window.
Results and feedback
For 2027 entry, results are due in December 2026 and you are emailed when they are released. Every candidate receives feedback, whatever the outcome. It reflects your individual performance, highlights your strengths and gives you tips to develop your performance in the future. Civil Service Careers adds that the feedback focuses on your performance and potential and does not tell you whether you progress, because the process is highly competitive.
What comes after the tests
The online tests are stage 1 of 4. Some schemes then ask for additional information, successful candidates attend a half-day virtual assessment centre, and most schemes finish with a final selection board. The 2027 application timeline lists every stage and date.
How to prepare
- Learn the four ratings until you can apply them without looking them up.
- Practise both answer types of the case study: most and least effective, and full ratings.
- Read every explanation, including for the actions you rated correctly: the reasoning is what transfers to new scenarios.
- Sit at least one full-length run in the official structure before your real test week.
CivilPrep follows the official structure: 6 full mocks, each with 12 work-based scenarios followed by a case study with 7 background documents and 24 situations, untimed like the real tests or at a 90-minute pace. Start with the free practice test and see your score in minutes.