PublishCodeCoverageResults@2 duplicated artifacts

Question

PublishCodeCoverageResults@2 duplicated artifacts

Pawlowska Malgorzata 80

Hi. I started using PublishCodeCoverageResults@2 in my pipeline and it seems to publish duplicated artifacts. I am using pytest and pytest-cov.
In artifacts I see (indexes & coverages seems to be duplicated):
Code Coverage Report_<build_id>:
._py.html
index.htm
index.html
Summary_4ecf013f: coverage.xml
Summary_ffd3a4e0: coverage.xml

What strings after Summary_ means? Are they randomly generated or correspond to sth?

Below is the task configuration in pipeline:

- task: PublishCodeCoverageResults@2
  condition: always()
  inputs:
    summaryFileLocation: 'reports/coverage.xml'
  displayName: "Publish code coverage results"

Rakesh Mishra 9,695 Reputation points Microsoft External Staff Moderator

2025-11-04T17:00:50.54+00:00

Hi Pawlowska Malgorzata - Munich-MR - external,

Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.

could you please share the pytest task in yaml file as well to check. You can remove any specific and share general task and parameters. Need this to see if any config is done.

Also, are you using any coverage config file in code?

Pawlowska Malgorzata 80

Hi. Thank you for picking up this topic so quickly.
Here are the exact pipeline steps:

steps:
- script: |
    pip install --upgrade pip
    pip install -r requirements.txt
  displayName: 'Install dependencies'

- script: |
    export PYTHONUNBUFFERED=1
    pytest
  displayName: 'Run pytest tests'

- task: PublishTestResults@2
  condition: always()
  inputs:
    testResultsFormat: 'JUnit'
    testResultsFiles: 'reports/test-results.xml'
    publishRunAttachements: 'true'
  displayName: "Publish test results to pipeline"

- task: PublishCodeCoverageResults@2
  condition: always()
  inputs:
    summaryFileLocation: 'reports/coverage.xml'
  displayName: "Publish code coverage results"

and here is the pytest.ini for configuration:

[pytest]
pythonpath = ./src

addopts = 
    -vs 
    --junit-xml=reports/test-results.xml
    --cov=src
    --cov-report xml:reports/coverage.xml

Pravallika KV 17,025 Reputation points Microsoft External Staff Moderator

2025-11-05T07:02:04.5066667+00:00

Hi Pawlowska Malgorzata, following up to see if the above provided response was helpful. If you have any further queries, do let us know.

Answer accepted by question author

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Rakesh Mishra 9,695 Reputation points Microsoft External Staff Moderator

2025-11-04T17:00:50.54+00:00

Hi Pawlowska Malgorzata - Munich-MR - external,

Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.

could you please share the pytest task in yaml file as well to check. You can remove any specific and share general task and parameters. Need this to see if any config is done.

Also, are you using any coverage config file in code?
Pawlowska Malgorzata 80 Reputation points

2025-11-04T17:14:28.8433333+00:00

Hi. Thank you for picking up this topic so quickly.
Here are the exact pipeline steps:

steps: - script: | pip install --upgrade pip pip install -r requirements.txt displayName: 'Install dependencies' - script: | export PYTHONUNBUFFERED=1 pytest displayName: 'Run pytest tests' - task: PublishTestResults@2 condition: always() inputs: testResultsFormat: 'JUnit' testResultsFiles: 'reports/test-results.xml' publishRunAttachements: 'true' displayName: "Publish test results to pipeline" - task: PublishCodeCoverageResults@2 condition: always() inputs: summaryFileLocation: 'reports/coverage.xml' displayName: "Publish code coverage results"

and here is the pytest.ini for configuration:

[pytest] pythonpath = ./src addopts = -vs --junit-xml=reports/test-results.xml --cov=src --cov-report xml:reports/coverage.xml
Pravallika KV 17,025 Reputation points Microsoft External Staff Moderator

2025-11-05T07:02:04.5066667+00:00

Hi Pawlowska Malgorzata, following up to see if the above provided response was helpful. If you have any further queries, do let us know.

Answer 1

Hi Pawlowska Malgorzata,

The duplicated artifacts observed when using PublishCodeCoverageResults@2 in your pipeline with pytest and pytest-cov are due to how the task internally generates unique coverage summary reports. The suffix strings after "Summary_" are unique identifiers (usually hashes) representing different report versions or metadata generated during the pipeline execution.

The duplicated artifacts like Summary_4ecf013f: coverage.xml and Summary_ffd3a4e0: coverage.xml result because PublishCodeCoverageResults@2 internally processes multiple coverage report snapshots or segments, assigning unique identifiers.
There is currently no option in the PublishCodeCoverageResults@2 task to disable this duplication or the internal report generation mechanism.
This behavior is known and documented in community reports and GitHub issues, and Microsoft is aware but has not provided a built-in configuration to suppress duplication yet.
Until a future update, you can either accept these duplicates or revert to using PublishCodeCoverageResults@1 combined with a separate report generation step for more control.
Ensure your pytest.ini or coverage config files are not generating multiple coverage files inadvertently.
Monitor Microsoft Docs and GitHub for updates or fixes to this behavior.

References:

PublishCodeCoverageResults@2 - Publish code coverage results v2 task | Microsoft Learn

[REGRESSION]: PublishCodeCoverageResults@2 no longer uploads the artifacts to the pipeline · Issue #19547 · microsoft/azure-pipelines-tasks

I hope the provided answer is helpful,

Please "Up Vote" if the information helped you. This will help us and others in the community as well.

Thank you.

Rakesh Mishra 9,695 Reputation points Microsoft External Staff Moderator

2025-11-05T13:26:44.41+00:00

Hi @Pawlowska Malgorzata , following up to see if you had a chance to check previous response and if it was helpful. Please do let me know if you're still facing the issue and need any further assistance on this. Please accept as Yes if the answer is helpful so that it can help others in the community.

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PublishCodeCoverageResults@2 duplicated artifacts

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