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Related papers: FlaPy: Mining Flaky Python Tests at Scale

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Flaky tests pass and fail non-deterministically when run on the same version of code. Although many techniques have been proposed to detect, debug, and repair flaky tests, reproducing their failures remains a major challenge due to their…

Software Engineering · Computer Science 2026-05-22 Suzzana Rafi , Mahbub-Ul-Hoque Sumon , Md Erfan , Maruf Morshed Khan , August Shi , Wing Lam

Flaky tests are software tests that exhibit a seemingly random outcome (pass or fail) when run against the same, identical code. Previous work has examined fixes to flaky tests and has proposed automated solutions to locate as well as fix…

Software Engineering · Computer Science 2019-07-03 Moritz Eck , Fabio Palomba , Marco Castelluccio , Alberto Bacchelli

Non-deterministically passing and failing test cases, so-called flaky tests, have recently become a focus area of software engineering research. While this research focus has been met with some enthusiastic endorsement from industry, prior…

Software Engineering · Computer Science 2022-04-11 Martin Gruber , Gordon Fraser

Tests that cause spurious failures without any code changes, i.e., flaky tests, hamper regression testing, increase maintenance costs, may shadow real bugs, and decrease trust in tests. While the prevalence and importance of flakiness is…

Software Engineering · Computer Science 2022-02-15 Martin Gruber , Stephan Lukasczyk , Florian Kroiß , Gordon Fraser

Test flakiness forms a major testing concern. Flaky tests manifest non-deterministic outcomes that cripple continuous integration and lead developers to investigate false alerts. Industrial reports indicate that on a large scale, the…

Software Engineering · Computer Science 2021-12-10 Sarra Habchi , Guillaume Haben , Mike Papadakis , Maxime Cordy , Yves Le Traon

Flaky tests yield different results when executed multiple times for the same version of the source code. Thus, they provide an ambiguous signal about the quality of the code and interfere with the automated assessment of code changes.…

Software Engineering · Computer Science 2026-02-04 Alexander Berndt , Thomas Bach , Sebastian Baltes

Flaky tests produce inconsistent outcomes without code changes, creating major challenges for software developers. An industrial case study reported that developers spend 1.28% of their time repairing flaky tests at a monthly cost of…

Software Engineering · Computer Science 2025-04-24 Owain Parry , Gregory Kapfhammer , Michael Hilton , Phil McMinn

Software systems have been continuously evolved and delivered with high quality due to the widespread adoption of automated tests. A recurring issue hurting this scenario is the presence of flaky tests, a test case that may pass or fail…

Software Engineering · Computer Science 2021-03-24 B. H. P. Camara , M. A. G. Silva , A. T. Endo , S. R. Vergilio

Non-deterministically behaving test cases cause developers to lose trust in their regression test suites and to eventually ignore failures. Detecting flaky tests is therefore a crucial task in maintaining code quality, as it builds the…

Software Engineering · Computer Science 2023-03-21 Martin Gruber , Michael Heine , Norbert Oster , Michael Philippsen , Gordon Fraser

Flaky tests (tests with non-deterministic outcomes) pose a major challenge for software testing. They are known to cause significant issues such as reducing the effectiveness and efficiency of testing and delaying software releases. In…

Software Engineering · Computer Science 2022-12-05 Shawn Rasheed , Amjed Tahir , Jens Dietrich , Negar Hashemi , Lu Zhang

Background: Test flakiness is a major problem in the software industry. Flaky tests fail seemingly at random without changes to the code and thus impede continuous integration (CI). Some researchers argue that all tests can be considered…

Software Engineering · Computer Science 2024-09-17 Alexander Berndt , Thomas Bach , Sebastian Baltes

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

Background. Automated test execution is an important activity to gather information about the quality of a software project. So-called flaky tests, however, negatively affect this process. Such tests fail seemingly at random without changes…

Software Engineering · Computer Science 2026-03-02 Alexander Berndt , Zoltán Nochta , Thomas Bach

Flaky tests are a common problem in software testing. They produce inconsistent results when executed multiple times on the same code, invalidating the assumption that a test failure indicates a software defect. Recent work on LLM-based…

Software Engineering · Computer Science 2026-01-15 Alexander Berndt , Thomas Bach , Rainer Gemulla , Marcus Kessel , Sebastian Baltes

Flaky tests have gained attention from the research community in recent years and with good reason. These tests lead to wasted time and resources, and they reduce the reliability of the test suites and build systems they affect. However,…

Software Engineering · Computer Science 2021-03-05 Alan Romano , Zihe Song , Sampath Grandhi , Wei Yang , Weihang Wang

Flaky tests are tests that can non-deterministically pass or fail, even in the absence of code changes.Despite being a source of false alarms, flaky tests often remain in test suites once they are detected, as they also may be relied upon…

Software Engineering · Computer Science 2024-01-30 Abdulrahman Alshammari , Paul Ammann , Michael Hilton , Jonathan Bell

Automated regression testing is a cornerstone of modern software development, often contributing directly to code review and Continuous Integration (CI). Yet some tests suffer from flakiness, where their outcomes vary non-deterministically.…

Software Engineering · Computer Science 2026-05-29 Tao Xiao , Dong Wang , Shane McIntosh , Hideaki Hata , Yasutaka Kamei

Flaky tests are tests that pass and fail on different executions of the same version of a program under test. They waste valuable developer time by making developers investigate false alerts (flaky test failures). To deal with this problem,…

Software Engineering · Computer Science 2023-02-22 Guillaume Haben , Sarra Habchi , Mike Papadakis , Maxime Cordy , Yves Le Traon

Flaky tests are tests that nondeterministically pass and fail in unchanged code. These tests can be detrimental to developers' productivity. Particularly when tests run in continuous integration environments, the tests may be competing for…

Software Engineering · Computer Science 2024-10-28 Denini Silva , Martin Gruber , Satyajit Gokhale , Ellen Arteca , Alexi Turcotte , Marcelo d'Amorim , Wing Lam , Stefan Winter , Jonathan Bell

Much research on software testing makes an implicit assumption that test failures are deterministic such that they always witness the presence of the same defects. However, this assumption is not always true because some test failures are…

Software Engineering · Computer Science 2019-12-09 Maxime Cordy , Renaud Rwemalika , Mike Papadakis , Mark Harman
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