Preparing for the Duolingo English Test (DET) means getting comfortable with its unique question types, setting up the right testing environment, and practicing under timed conditions. Unlike traditional English proficiency exams, the DET is taken at home on your computer, lasts about an hour, and costs a fraction of what other tests charge. That convenience comes with strict rules about your setup and behavior during the test, so preparation goes beyond just studying English.
How the Test Is Scored
The DET scores range from 10 to 160. You receive an overall score plus four individual subscores: Speaking, Writing, Reading, and Listening. The test also reports four integrated subscores that combine pairs of skills. Production averages your Writing and Speaking scores. Literacy averages Reading and Writing. Comprehension averages Listening and Reading. Conversation averages Speaking and Listening.
Most universities that accept the DET publish a minimum overall score, typically between 100 and 130 depending on the program. Check your target school’s requirement before you start preparing so you know what you’re aiming for. Because the subscores cover every combination of skills, a weakness in one area will drag down multiple integrated scores. Balanced preparation across all four skills matters more here than on tests where sections are scored independently.
Know the Question Types
The DET mixes short adaptive items with longer open-ended tasks. The adaptive portion includes things like identifying real English words from a list of made-up ones, filling in missing letters in a sentence, listening to a clip and typing what you hear, and reading a passage aloud. These items get harder or easier based on how you’re performing, which is how the test pinpoints your level quickly.
The open-ended tasks ask you to write or speak at length. You might watch a short video and then summarize it in writing, look at an image and describe it aloud, or respond to a prompt with a few paragraphs of written argument. These sections carry significant weight because they demonstrate how well you produce English, not just recognize it.
Interactive Listening
The test includes two Interactive Listening conversations. Each one starts with a scenario you listen to, followed by 3 to 4 fill-in-the-blank questions about what you heard. After that, you answer 5 to 6 “Listen and Respond” questions and finish with a summarization task.
You get 6 minutes and 30 seconds total for the questions before the summarization, and 75 seconds for the summary itself. One timer runs continuously through the question portion, so replaying audio eats into your available time. The scenario audio does have unlimited replays and stays available even during the later questions if you scroll up, but use replays strategically. You can paraphrase answers rather than writing exactly what you heard, and minor spelling or grammar mistakes won’t count against you as long as they don’t change the meaning.
Use the Free Official Practice Materials
Duolingo offers free practice resources on its test readiness page at englishtest.duolingo.com/readiness. You’ll find a practice test that mirrors the real exam, breakdowns of every question type, and video walkthroughs covering test rules, the full test experience, and how scoring works. Start here before spending money on anything else.
Take the practice test under realistic conditions: sit at your actual testing desk, use the same computer, and don’t pause or look things up. Your practice score won’t be a perfect predictor of your real result, but it gives you a baseline and shows you which question types feel unfamiliar. After your first practice run, spend time on the question type breakdowns for any formats that tripped you up, then take the practice test again a week or two later to gauge improvement.
Build Skills for Each Subscore
Because the test measures four distinct skills, your study plan should touch all of them regularly rather than focusing on just one.
- Reading: Practice with English news articles, academic blogs, or short essays. Focus on reading quickly while understanding main ideas. The test’s adaptive reading items often require you to fill in missing words, so pay attention to how English sentences are constructed, including common collocations and grammatical patterns.
- Listening: Watch English-language videos, podcasts, or lectures without subtitles. Practice writing down what you hear. For the Interactive Listening sections specifically, get comfortable taking notes while listening and then paraphrasing key points from memory.
- Writing: Practice timed writing every day. Give yourself 3 to 5 minutes to respond to a prompt, which mirrors the pressure of the real test. Focus on clear organization: a direct opening statement, supporting details, and a logical flow. Don’t aim for complex vocabulary you’re unsure about. Accuracy and clarity score better than ambitious words used incorrectly.
- Speaking: Record yourself answering prompts aloud. Listen back for clarity, pronunciation, and whether you actually addressed the question. The test asks you to speak for 30 to 90 seconds on various topics, so practice filling that time with structured responses rather than trailing off or repeating yourself.
Set Up Your Testing Environment
The DET is proctored remotely, which means your computer’s camera and microphone are recording throughout the test. You also need a second camera, typically your smartphone, positioned to show both your computer screen and keyboard. Getting this setup right before test day prevents technical problems that could invalidate your results.
You need a computer running Windows or Mac with a front-facing camera, a microphone, and speakers (headphones and earbuds are not allowed). You also need a valid government-issued ID such as a passport or driver’s license, and a reliable internet connection. Before the test, restart your computer and close every program except the DET desktop app. Apps that auto-launch, like messaging tools, screen-sharing software, or browser extensions like Grammarly, can trigger a flag. Disable them ahead of time.
Set your phone to Do Not Disturb mode and position it where Duolingo’s setup instructions indicate. Once the test begins, do not move or touch your phone.
Avoid Getting Your Results Invalidated
Duolingo uses AI and human reviewers to monitor your test session. Several common behaviors lead to invalidated results, and most of them are easy to prevent if you know the rules in advance.
Keep your eyes on the screen at all times, even when you’re thinking through a response. Looking away from the screen, even briefly, is one of the most frequently broken rules. If you need a moment to think, do it while looking at the test window. Looking down at the keyboard to type is fine and won’t affect your certification.
No one else can be in the room while you’re testing. Tell everyone in your household that you’re taking an exam and lock the door or put up a sign. If someone walks in by accident, have them leave immediately without speaking. Choose a quiet room with good lighting so your face is clearly visible on camera throughout the session.
Do not use any notes, textbooks, or second screens. Do not speak to anyone or use your phone. These rules are strict because the test is unsupervised by a live proctor, so the automated monitoring system is designed to be aggressive about flagging anything unusual.
A Practice Schedule That Works
Two to four weeks of focused preparation is enough for most test takers who already have intermediate or higher English proficiency. If you’re starting from a lower level, you may need a longer runway to build foundational skills.
In your first week, take the official practice test, review every question type, and identify your weakest areas. Spend weeks two and three doing daily practice in all four skills, with extra time on your weak spots. Aim for at least 30 minutes of active practice per day. In your final week, take the practice test again under strict test-day conditions, fine-tune your room setup, and do a tech check with your computer, camera, phone, and internet connection.
On test day, take the exam when you’re alert and unlikely to be interrupted. Morning tends to work well for most people. Have your ID ready, your room set up, and your phone in position before you launch the app. The test takes about an hour, and results typically arrive within 48 hours.