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Flaky tests are problematic because they non-deterministically pass or fail for the same software version under test, causing confusion and wasting development effort. While machine learning models have been used to predict flakiness and…

Software Engineering · Computer Science 2024-10-08 Sakina Fatima , Hadi Hemmati , Lionel Briand

Flaky tests, which pass or fail inconsistently without code changes, are a major challenge in software engineering in general and in quantum software engineering in particular due to their complexity and probabilistic nature, leading to…

Software Engineering · Computer Science 2024-11-01 Janakan Sivaloganathan , Ainaz Jamshidi , Andriy Miranskyy , Lei Zhang

White-box test generator tools rely only on the code under test to select test inputs, and capture the implementation's output as assertions. If there is a fault in the implementation, it could get encoded in the generated tests. Tool…

Software Engineering · Computer Science 2019-05-21 David Honfi , Zoltan Micskei

We can never be certain that a software system is correct simply by testing it, but with every additional successful test we become less uncertain about its correctness. In absence of source code or elaborate specifications and models,…

Software Engineering · Computer Science 2016-08-11 Neil Walkinshaw , Gordon Fraser

Automated unit test generation is an established research field, and mature test generation tools exist for statically typed programming languages such as Java. It is, however, substantially more difficult to automatically generate…

Software Engineering · Computer Science 2020-10-07 Stephan Lukasczyk , Florian Kroiß , Gordon Fraser

Flaky tests pose a significant issue for software testing. A test with a non-deterministic outcome may undermine the reliability of the testing process, making tests untrustworthy. Previous research has identified test order dependency as…

Software Engineering · Computer Science 2025-01-23 Negar Hashemi , Amjed Tahir , Shawn Rasheed , August Shi , Rachel Blagojevic

Test flakiness is a significant issue in industry, affecting test efficiency and product quality. While extensive research has examined the impact of flaky tests, many root causes remain unexplored, particularly in the context of dynamic…

Software Engineering · Computer Science 2026-02-24 Negar Hashemi , Amjed Tahir , August Shi , Shawn Rasheed , Rachel Blagojevic

Prior research has extensively studied flaky tests in various domains, such as web applications, mobile applications, and other open-source projects in a range of multiple programing languages, including Java, Javascript, Python, Ruby, and…

Software Engineering · Computer Science 2025-02-06 Tom Schroeder , Minh Phan , Yang Chen

Flaky tests yield inconsistent results when they are repeatedly executed on the same code revision. They interfere with automated quality assurance of code changes and hinder efficient software testing. Previous work evaluated approaches to…

Software Engineering · Computer Science 2026-02-06 Alexander Berndt , Vekil Bekmyradov , Rainer Gemulla , Marcus Kessel , Thomas Bach , Sebastian Baltes

Like classical software, quantum software systems rely on automated testing. However, their inherently probabilistic outputs make them susceptible to quantum flakiness -- tests that pass or fail inconsistently without code changes. Such…

Software Engineering · Computer Science 2026-03-11 Janakan Sivaloganathan , Ainaz Jamshidi , Andriy Miranskyy , Lei Zhang

This paper explores the effectiveness of modular randomized testing for object oriented programs in Java. Modular testing involves testing individual components of a program in isolation. Often times, for effective test generation, a series…

Software Engineering · Computer Science 2026-05-06 Elizabeth Dinella

Automated unit test generators, particularly search-based software testing tools like EvoSuite, are capable of generating tests with high coverage. Although these generators alleviate the burden of writing unit tests, they often pose…

Software Engineering · Computer Science 2024-08-22 Amirhossein Deljouyi , Roham Koohestani , Maliheh Izadi , Andy Zaidman

Flaky tests that non-deterministically pass or fail waste developer time and slow release cycles. While large language models (LLMs) show promise for automatically repairing flaky tests, existing approaches like FlakyDoctor fail in…

Software Engineering · Computer Science 2025-11-19 Chengpeng Li , Farnaz Behrang , August Shi , Peng Liu

Automated unit test generation is a well-known methodology aiming to reduce the developers' effort of writing tests manually. Prior research focused mainly on statically typed programming languages like Java. In practice, however,…

Software Engineering · Computer Science 2022-02-11 Stephan Lukasczyk , Gordon Fraser

Simulators are widely used to test Autonomous Driving Systems (ADS), but their potential flakiness can lead to inconsistent test results. We investigate test flakiness in simulation-based testing of ADS by addressing two key questions: (1)…

Software Engineering · Computer Science 2023-12-01 Mohammad Hossein Amini , Shervin Naseri , Shiva Nejati

Validation of Android apps via testing is difficult owing to the presence of flaky tests. Due to non-deterministic execution environments, a sequence of events (a test) may lead to success or failure in unpredictable ways. In this work, we…

Software Engineering · Computer Science 2021-05-24 Zhen Dong , Abhishek Tiwari , Xiao Liang Yu , Abhik Roychoudhury

Various mature automated test generation tools exist for statically typed programming languages such as Java. Automatically generating unit tests for dynamically typed programming languages such as Python, however, is substantially more…

Software Engineering · Computer Science 2022-07-19 Stephan Lukasczyk , Florian Kroiß , Gordon Fraser

LLMs promise to transform unit test generation from a manual burden into an automated solution. Yet, beyond metrics such as compilability or coverage, little is known about the quality of LLM-generated tests, particularly their…

Software Engineering · Computer Science 2025-11-07 Wendkûuni C. Ouédraogo , Yinghua Li , Xueqi Dang , Xunzhu Tang , Anil Koyuncu , Jacques Klein , David Lo , Tegawendé F. Bissyandé

Background. Evidence suggests that mobile applications are not thoroughly tested as their desktop counterparts. In particular GUI testing is generally limited. Like web-based applications, mobile apps suffer from GUI test fragility, i.e.…

Software Engineering · Computer Science 2017-11-13 Riccardo Coppola , Maurizio Morisio , Marco Torchiano

Software testing is an essential part of the software development cycle to improve the code quality. Typically, a unit test consists of a test prefix and a test oracle which captures the developer's intended behaviour. A known limitation of…

Software Engineering · Computer Science 2024-10-29 Michael Konstantinou , Renzo Degiovanni , Mike Papadakis