Regression Testing Workflow

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What is Regression Testing?

Regression testing ensures that new code changes haven’t broken existing functionality. It’s typically run before releases or after significant code changes.

While smoke tests verify “can we continue testing?”, regression tests verify “are we ready to ship?”

When to Run Regression Tests

Before Release

Comprehensive validation before shipping to production

After Major Changes

Verify large features or refactoring didn’t break anything

Sprint End

Validate all sprint work before demo/release

After Hotfix

Ensure hotfix didn’t introduce new issues

Building a Regression Suite

Start with Critical Tests

Include all smoke tests (P0/P1 critical paths)

Add Feature Coverage

Include tests for all major features:

priority IN (p0, p1, p2) AND status = active

Add Historical Failures

Include tests that have failed before:

failure_count > 0 AND status = active
ORDER BY failure_count DESC

Tag Tests

Tag tests with regression for easy filtering:

tags CONTAINS "regression" AND status = active

Balance Coverage vs Time

Target suite that completes in 2-4 hours maximum

Regression Testing Strategy

Full Regression
Selective Regression
Automated Regression

Complete Test Suite

Run all regression tests before major releases.When to use:

Major version releases
Quarterly releases
After significant architecture changes

Characteristics:

100+ tests
2-4 hours execution time
All features covered
All priority levels (P0-P3)

Full regression is time-consuming. Reserve for major releases only.

Risk-Based Testing

Test only areas affected by recent changes.When to use:

Sprint releases
Minor version updates
Targeted hotfixes

Strategy:

# Tests in affected components
component IN (authentication, checkout) AND
tags CONTAINS "regression" AND
status = active

Benefits:

Faster execution (30-60 minutes)
Focused on risk areas
More frequent testing possible

Running Regression Tests

Select Test Suite

Choose appropriate regression level:

# Full regression
tags CONTAINS "regression" AND status = active
ORDER BY priority ASC

# Selective regression (e.g., auth module)
tags CONTAINS "regression" AND
component = "authentication" AND
status = active

Create Test Run

Configure the test run:

Name: Regression - v2.1.0 Release
Environment: Staging
Build: 2.1.0-rc1
Assigned to: Distribute among team

Execute Tests

Team executes assigned tests in parallel

Track Progress

Monitor run dashboard for:

Completion percentage
Pass/fail rate
Blockers
Failed tests needing triage

Triage Failures

For each failure:

Is it a real bug? Create defect.
Is it a test issue? Fix the test.
Is it environmental? Investigate environment.

Release Decision

Decide go/no-go based on results:

All P0 tests passed? ✅ Can release
Any P0 failures? ❌ Block release
P1/P2 failures? Assess risk

Example Regression Suites

Web Application Regression

Scope: Full website functionalityCategories:

Authentication (10 tests)
Navigation (15 tests)
User Profile (12 tests)
Search (8 tests)
Content Management (20 tests)
Forms & Validation (18 tests)
Notifications (7 tests)
Settings (10 tests)

Total: ~100 tests Time: ~3 hours Tags: regression, web

API Regression

Scope: All API endpointsCategories:

Authentication endpoints (5 tests)
User CRUD operations (12 tests)
Product endpoints (15 tests)
Order processing (10 tests)
Search & filtering (8 tests)
File uploads (6 tests)
Webhooks (5 tests)

Total: ~60 tests Time: ~45 minutes (automated) Tags: regression, api, automated

Mobile App Regression

Scope: iOS & Android appsCategories (per platform):

App launch & onboarding (5 tests)
Login & authentication (8 tests)
Main navigation (10 tests)
Core features (25 tests)
Settings & preferences (7 tests)
Offline functionality (10 tests)
Push notifications (5 tests)

Total: ~70 tests per platform Time: ~2 hours per platform Tags: regression, mobile, ios/android

Optimizing Regression Testing

Prioritize by Risk

Test high-risk, frequently-changed areas first

Automate Stable Tests

Move stable, repetitive tests to automation

Parallelize Execution

Distribute tests across team members

Remove Obsolete Tests

Archive tests for deprecated features

Maintain Test Quality

Fix flaky tests immediately

Track Trends

Monitor pass rates and execution times

Regression Test Maintenance

Adding New Tests

When to add tests to regression suite:

New feature released
Bug found in production
Area lacking coverage
High-value user workflow

Process:

Create test case
Execute to validate it works
Tag with regression
Add to appropriate folder

Removing Tests

When to remove tests from regression suite:

Feature deprecated/removed
Test is consistently flaky
Test is redundant with other tests
Feature changed significantly

Process:

Change status to archived (don’t delete)
Remove regression tag
Document why it was removed

Updating Tests

Keep tests current with product changes:

Review test suite quarterly
Update after major feature changes
Fix broken tests immediately
Refine test steps for clarity
Update expected results

Assign test ownership to feature teams for ongoing maintenance

Integration with Release Process

What’s Next?

Smoke Tests

Quick verification tests

Organizing Tests

Structure your test suite

Team Collaboration

Work together on testing

Best Practices

Testing best practices

Common Workflows

Regression Testing Workflow

What is Regression Testing?

When to Run Regression Tests

Before Release

After Major Changes

Sprint End

After Hotfix

Building a Regression Suite

Regression Testing Strategy

Complete Test Suite

Risk-Based Testing

Continuous Regression

Running Regression Tests

Example Regression Suites

Optimizing Regression Testing

Prioritize by Risk

Automate Stable Tests

Parallelize Execution

Remove Obsolete Tests

Maintain Test Quality

Track Trends

Regression Test Maintenance

Integration with Release Process

What’s Next?

Smoke Tests

Organizing Tests

Team Collaboration

Best Practices

​What is Regression Testing?

​When to Run Regression Tests

Before Release

After Major Changes

Sprint End

After Hotfix

​Building a Regression Suite

​Regression Testing Strategy

​Complete Test Suite

​Risk-Based Testing

​Continuous Regression

​Running Regression Tests

​Example Regression Suites

​Optimizing Regression Testing

Prioritize by Risk

Automate Stable Tests

Parallelize Execution

Remove Obsolete Tests

Maintain Test Quality

Track Trends

​Regression Test Maintenance

​Integration with Release Process

​What’s Next?

Smoke Tests

Organizing Tests

Team Collaboration

Best Practices

What is Regression Testing?

When to Run Regression Tests

Building a Regression Suite

Regression Testing Strategy

Complete Test Suite

Risk-Based Testing

Continuous Regression

Running Regression Tests

Example Regression Suites

Optimizing Regression Testing

Regression Test Maintenance

Integration with Release Process

What’s Next?