Flaky test detection and retry in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to mark a test as flaky using pytest.

PyTest

import pytest

@pytest.[1](reruns=3)
def test_example():
    assert True

Drag options to blanks, or click blank then click option'

Amark

Bmark.flaky

Cmark.flaky(reruns=3)

Dflaky

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'flaky' directly without 'mark'.

Trying to call the decorator instead of using it as an attribute.

The correct decorator to mark a test for reruns in pytest is @pytest.mark.flaky. Here, mark is used as @pytest.mark.flaky with the reruns argument.

2fill in blank

medium

Complete the code to retry a flaky test 5 times with pytest.

PyTest

import pytest

@pytest.mark.flaky(reruns=[1])
def test_retry():
    assert False

Drag options to blanks, or click blank then click option'

A5

B3

C1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Setting reruns to 0 disables retries.

Using a string instead of an integer.

Setting reruns=5 tells pytest to retry the test up to 5 times if it fails.

3fill in blank

hard

Fix the error in the flaky test decorator syntax.

PyTest

import pytest

@pytest.mark.flaky(reruns=[1])
def test_fail():
    assert False

Drag options to blanks, or click blank then click option'

A'3'

Bthree

C3

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string instead of an integer for reruns.

Passing None which disables retries.

The reruns parameter must be an integer, not a string or other type.

4fill in blank

hard

Fill both blanks to retry a flaky test 4 times and delay retries by 2 seconds.

PyTest

import pytest

@pytest.mark.flaky(reruns=[1], reruns_delay=[2])
def test_delayed_retry():
    assert False

Drag options to blanks, or click blank then click option'

A4

B2

C3

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up reruns and reruns_delay values.

Using strings instead of integers.

Use reruns=4 to retry 4 times and reruns_delay=2 to wait 2 seconds between retries.

5fill in blank

hard

Fill all three blanks to retry a flaky test 3 times, delay 1 second between retries, and only rerun on AssertionError.

PyTest

import pytest

@pytest.mark.flaky(reruns=[1], reruns_delay=[2], reruns_exceptions=[3])
def test_specific_exception():
    assert False

Drag options to blanks, or click blank then click option'

A3

B1

C(AssertionError,)

D(Exception,)

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong exception types for reruns_exceptions.

Forgetting to use a tuple for exceptions.

Set reruns=3 for retry count, reruns_delay=1 for delay, and reruns_exceptions=(AssertionError,) to retry only on assertion failures.