Prompt-Based REST API Test Amplification in Industry: An Experience Report
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866911398852820992 |
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| author | Bardakci, Tolgahan Faes, Andreas Beyazit, Mutlu Demeyr, Serge |
| author_facet | Bardakci, Tolgahan Faes, Andreas Beyazit, Mutlu Demeyr, Serge |
| contents | Large Language Models (LLMs) are increasingly used to support software testing tasks, yet there is little evidence of their effectiveness for REST API testing in industrial settings. To address this gap, we replicate our earlier work on LLM-based REST API test amplification within an industrial context at one of the largest logistics companies in Belgium. We apply LLM-based test amplification to six representative endpoints of a production microservice embedded in a large-scale, security-sensitive system, where there is in-depth complexity in authentication, stateful behavior, and organizational constraints. Our experience shows that LLM-based test amplification remains practically useful in industry by increasing coverage and revealing various observations and anomalies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_17903 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Prompt-Based REST API Test Amplification in Industry: An Experience Report Bardakci, Tolgahan Faes, Andreas Beyazit, Mutlu Demeyr, Serge Software Engineering Large Language Models (LLMs) are increasingly used to support software testing tasks, yet there is little evidence of their effectiveness for REST API testing in industrial settings. To address this gap, we replicate our earlier work on LLM-based REST API test amplification within an industrial context at one of the largest logistics companies in Belgium. We apply LLM-based test amplification to six representative endpoints of a production microservice embedded in a large-scale, security-sensitive system, where there is in-depth complexity in authentication, stateful behavior, and organizational constraints. Our experience shows that LLM-based test amplification remains practically useful in industry by increasing coverage and revealing various observations and anomalies. |
| title | Prompt-Based REST API Test Amplification in Industry: An Experience Report |
| topic | Software Engineering |
| url | https://arxiv.org/abs/2601.17903 |