User Guide

ANSI codes

Note that ANSI code support depends on the ansi2html package. Due to the use of a less permissive license, this package is not included as a dependency. If you have this package installed, then ANSI codes will be converted to HTML in your report.

Creating a self-contained report

In order to respect the Content Security Policy (CSP), several assets such as CSS and images are stored separately by default. You can alternatively create a self-contained report, which can be more convenient when sharing your results. This can be done in the following way:

$ pytest --html=report.html --self-contained-html

Images added as files or links are going to be linked as external resources, meaning that the standalone report HTML file may not display these images as expected.

The plugin will issue a warning when adding files or links to the standalone report.

Enhancing reports


Custom CSS (Cascasding Style Sheets) can be passed on the command line using the --css option. These will be applied in the order specified, and can be used to change the appearance of the report.

$ pytest --html=report.html --css=highcontrast.css --css=accessible.css

Report Title

By default the report title will be the filename of the report, you can edit it by using the pytest_html_report_title hook:

def pytest_html_report_title(report):
    report.title = "My very own title!"


The Environment section is provided by the pytest-metadata plugin, and can be accessed via the pytest_configure and pytest_sessionfinish hooks:

To modify the Environment section before tests are run, use pytest_configure:

def pytest_configure(config):
    config._metadata["foo"] = "bar"

To modify the Environment section after tests are run, use pytest_sessionfinish:

import pytest

def pytest_sessionfinish(session, exitstatus):
    session.config._metadata["foo"] = "bar"

Note that in the above example @pytest.hookimpl(tryfirst=True) is important, as this ensures that a best effort attempt is made to run your pytest_sessionfinish before any other plugins ( including pytest-html and pytest-metadata ) run theirs. If this line is omitted, then the Environment table will not be updated since the pytest_sessionfinish of the plugins will execute first, and thus not pick up your change.

The generated table will be sorted alphabetically unless the metadata is a collections.OrderedDict.

It is possible to redact variables from the environment table. Redacted variables will have their names displayed, but their values grayed out. This can be achieved by setting environment_table_redact_list in your INI configuration file (e.g.: pytest.ini). environment_table_redact_list is a linelist of regexes. Any environment table variable that matches a regex in this list has its value redacted.

For example, the following will redact all environment table variables that match the regexes ^foo$, .*redact.*, or bar:

environment_table_redact_list = ^foo$

Additional summary information

You can edit the Summary section by using the pytest_html_results_summary hook:

from py.xml import html

def pytest_html_results_summary(prefix, summary, postfix):
    prefix.extend([html.p("foo: bar")])

Extra content

You can add details to the HTML report by creating an ‘extra’ list on the report object. Here are the types of extra content that can be added:




extra.html('<div>Additional HTML</div>')


extra.json({'name': 'pytest'})

Plain text

extra.text('Add some simple Text')




extra.image(image, mime_type='image/gif', extension='gif')





Note: When adding an image from file, the path can be either absolute or relative.

Note: When using --self-contained-html, images added as files or links may not work as expected, see section Creating a self-contained report for more info.

There are also convenient types for several image formats:

Image format








The following example adds the various types of extras using a pytest_runtest_makereport hook, which can be implemented in a plugin or file:

import pytest

def pytest_runtest_makereport(item, call):
    pytest_html = item.config.pluginmanager.getplugin("html")
    outcome = yield
    report = outcome.get_result()
    extra = getattr(report, "extra", [])
    if report.when == "call":
        # always add url to report
        xfail = hasattr(report, "wasxfail")
        if (report.skipped and xfail) or (report.failed and not xfail):
            # only add additional html on failure
            extra.append(pytest_html.extras.html("<div>Additional HTML</div>"))
        report.extra = extra

You can also specify the name argument for all types other than html which will change the title of the created hyper link:

extra.append(pytest_html.extras.text("some string", name="Different title"))

It is also possible to use the fixture extra to add content directly in a test function without implementing hooks. These will generally end up before any extras added by plugins.

from pytest_html import extras

def test_extra(extra):
    extra.append(extras.text("some string"))

Modifying the results table

You can modify the columns of the report by implementing custom hooks for the header and rows. The following example adds a description column with the test function docstring, adds a sortable time column, and removes the links column:

from datetime import datetime
from py.xml import html
import pytest

def pytest_html_results_table_header(cells):
    cells.insert(1,"Time", class_="sortable time", col="time"))

def pytest_html_results_table_row(report, cells):
    cells.insert(1,, class_="col-time"))

def pytest_runtest_makereport(item, call):
    outcome = yield
    report = outcome.get_result()
    report.description = str(item.function.__doc__)

You can also remove results by implementing the pytest_html_results_table_row hook and removing all cells. The following example removes all passed results from the report:

def pytest_html_results_table_row(report, cells):
    if report.passed:
        del cells[:]

The log output and additional HTML can be modified by implementing the pytest_html_results_html hook. The following example replaces all additional HTML and log output with a notice that the log is empty:

from py.xml import html

def pytest_html_results_table_html(report, data):
    if report.passed:
        del data[:]
        data.append(html.div("No log output captured.", class_="empty log"))

Display options

Auto Collapsing Table Rows

By default, all rows in the Results table will be expanded except those that have Passed.

This behavior can be customized either with a query parameter: ?collapsed=Passed,XFailed,Skipped or by setting the render_collapsed in a configuration file (pytest.ini, setup.cfg, etc).

render_collapsed = True

NOTE: Setting render_collapsed will, unlike the query parameter, affect all statuses.

Controlling Test Result Visibility Via Query Params

By default, all tests are visible, regardless of their results. It is possible to control which tests are visible on page load by passing the visible query parameter. To use this parameter, please pass a comma separated list of test results you wish to be visible. For example, passing ?visible=passed,skipped will show only those tests in the report that have outcome passed or skipped.

Note that this match is case insensitive, so passing PASSED and passed has the same effect.

The following query parameters may be passed:

  • passed

  • skipped

  • failed

  • error

  • xfailed

  • xpassed

  • rerun

Formatting the Duration Column

The formatting of the timestamp used in the Durations column can be modified by setting duration_formatter on the report attribute. All time.strftime formatting directives are supported. In addition, it is possible to supply %f to get duration milliseconds. If this value is not set, the values in the Durations column are displayed in %S.%f format where %S is the total number of seconds a test ran for.

Below is an example of a file setting duration_formatter:

import pytest

def pytest_runtest_makereport(item, call):
    outcome = yield
    report = outcome.get_result()
    setattr(report, "duration_formatter", "%H:%M:%S.%f")

NOTE: Milliseconds are always displayed with a precision of 2