Running tests (pytest command) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the basic command to run tests using pytest?

The basic command is pytest. Running this in the terminal will discover and run all test files and functions following pytest naming conventions.

beginner

How do you run a specific test file with pytest?

Use pytest <filename>.py to run tests only in that file. For example, pytest test_example.py runs tests in test_example.py.

beginner

What option shows detailed output for each test when running pytest?

Use pytest -v to run tests in verbose mode. It shows each test name and its pass/fail status clearly.

intermediate

How can you run only tests that failed in the last pytest run?

Use pytest --lf (or --last-failed) to rerun only the tests that failed previously. This helps focus on fixing errors quickly.

intermediate

What does the command pytest -k "expression" do?

It runs only tests whose names match the given expression. For example, pytest -k "login" runs tests with 'login' in their names.

Which command runs all tests in the current directory using pytest?

A pytest

B pytest run

C pytest all

D pytest start

The simple command pytest runs all tests it finds in the current directory and subdirectories.

How do you run tests in a specific file named test_math.py?

A pytest run test_math.py

B pytest -f test_math.py

C pytest test_math.py

D pytest -file test_math.py

Use pytest test_math.py to run tests only in that file.

What does the -v option do when running pytest?

A Runs tests very fast

B Runs tests in verbose mode showing detailed info

C Validates test syntax only

D Verifies pytest installation

The -v option makes pytest show detailed info about each test run.

Which pytest option reruns only the tests that failed last time?

A --fail-last

B --failed-only

C --rerun-fail

D --lf

The --lf or --last-failed option reruns only previously failed tests.

How do you run tests with names containing 'user' using pytest?

A pytest -k "user"

B pytest --name user

C pytest --filter user

D pytest -f user

The -k option filters tests by name matching the given expression.

Explain how to run all tests and how to run tests from a specific file using pytest.

Think about the simplest command and how to specify a file.

Describe how to rerun only failed tests and how to run tests selectively by name using pytest.

Focus on options that help save time during test runs.