# Improving Test Coverage in the Interview Coach Application with GitHub Copilot

DevFeed: [Improving Test Coverage in the Interview Coach Application with GitHub Copilot](<https://devfeed.tech/articles/today-i-will-improve-test-coverage-26909.md>)

Original publisher: [Read original article](<https://devblogs.microsoft.com/visualstudio/today-i-will-improve-test-coverage/>)

Author: Aaron Powell

Published: 2026-09-15T16:00:21Z

Content type: tutorial

Language: en

Sources: [Visual Studio Blog](<https://devfeed.tech/sources/visual-studio-blog.md>)

Topics: [test-coverage](<https://devfeed.tech/topics/test-coverage.md>), [Test coverage](<https://devfeed.tech/topics/coverage.md>), [GitHub Copilot](<https://devfeed.tech/topics/github-copilot.md>), [App](<https://devfeed.tech/topics/app.md>), [Visual Studio](<https://devfeed.tech/topics/visual-studio.md>), [Code](<https://devfeed.tech/topics/code.md>)

Tags: [agent](<https://devfeed.tech/tags/agent.md>), [analysis](<https://devfeed.tech/tags/analysis.md>), [code-coverage](<https://devfeed.tech/tags/code-coverage.md>), [copilot](<https://devfeed.tech/tags/copilot.md>), [github-copilot](<https://devfeed.tech/tags/github-copilot.md>), [productivity](<https://devfeed.tech/tags/productivity.md>), [projects](<https://devfeed.tech/tags/projects.md>), [run](<https://devfeed.tech/tags/run.md>), [test](<https://devfeed.tech/tags/test.md>), [test-coverage](<https://devfeed.tech/tags/test-coverage.md>), [testing](<https://devfeed.tech/tags/testing.md>), [tests](<https://devfeed.tech/tags/tests.md>), [unit-tests](<https://devfeed.tech/tags/unit-tests.md>), [visual-studio](<https://devfeed.tech/tags/visual-studio.md>)

## AI overview

This tutorial explains how to improve test coverage in the Interview Coach application by establishing a baseline, using GitHub Copilot's Test Agent to generate unit tests, and analyzing coverage across the solution. The article reports coverage increasing from 37% to 81%.

## Source excerpt

Today I want to look at how we can improve on the test coverage that we have in the Interview Coach application. This application has some unit tests in it already, but I'm sure there is room for improvement. Defining our baseline Before we start writing tests, it's a good idea to have a baseline [...] The post Today I will... improve test coverage appeared first on Visual Studio Blog.