Why parallel tests reduce total time in PyTest - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to run tests in parallel using pytest.

PyTest

pytest -n [1]

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

A2

B1

C4

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 or 1 means tests run sequentially, not in parallel.

Choosing a number larger than available CPU cores can slow down tests.

Using -n 2 runs tests on 2 CPU cores in parallel, reducing total test time.

2fill in blank

medium

Complete the code to import the pytest-xdist plugin for parallel testing.

PyTest

import [1]

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

Apytest-xdist

Bpytest

Cpytest_xdist

Dpytestxdist

Attempts:

3 left

💡 Hint

Common Mistakes

Using dashes instead of underscores causes import errors.

Trying to import the base pytest package instead of the plugin.

The plugin name to import is pytest_xdist with underscore, enabling parallel test execution.

3fill in blank

hard

Fix the error in the pytest command to run tests in parallel on 3 CPUs.

PyTest

pytest -n [1]

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

An3

B3

C-3

Dthree

Attempts:

3 left

💡 Hint

Common Mistakes

Writing the number as a word causes command errors.

Adding extra characters breaks the command.

The correct syntax is -n 3 with a number, not words or extra characters.

4fill in blank

hard

Fill both blanks to create a pytest command that runs tests in parallel and shows detailed output.

PyTest

pytest [1] [2]

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

A-n 2

B-v

C-q

D--maxfail=1

Attempts:

3 left

💡 Hint

Common Mistakes

Using -q hides output, not shows it.

Using --maxfail=1 stops tests early, not related to parallelism.

-n 2 runs tests on 2 CPUs in parallel, and -v shows detailed test results.

5fill in blank

hard

Fill all three blanks to write a pytest command that runs tests in parallel on 4 CPUs, stops after 2 failures, and shows verbose output.

PyTest

pytest [1] [2] [3]

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

A-n 4

B-v

C--maxfail=2

D-q

Attempts:

3 left

💡 Hint

Common Mistakes

Using -q instead of -v hides output.

Not including --maxfail means tests run even after many failures.

-n 4 runs tests on 4 CPUs, --maxfail=2 stops after 2 failures, and -v shows detailed output.