Selenium is primarily designed for web browser automation and is not natively suited to traditional host or terminal-based environments. In some hybrid architectures, Selenium may support web-facing components, but dedicated mainframe automation testing tools are typically required for green-screen or legacy systems.
Mainframe Automation Testing
Many organisations rely on legacy host systems to support critical operations. Effective automation testing ensures stability, performance and security across complex, business-critical environments.
T-Plan enables scalable, non-invasive testing that supports end-to-end validation without altering certified systems.
- End-to-end workflow validation
Test complete business processes across host and connected systems. - Performance and security assurance
Support compliance and stability within controlled test environments. - Non-invasive legacy automation
Execute testing at screen level without installing agents. - Scalable parallel execution
Reduce regression cycles across multiple environments.
Why Choose T-Plan for Mainframe Automation Testing?
Legacy host systems demand automation that is reliable, non-invasive and capable of operating within controlled environments.
T-Plan provides robust mainframe automation testing tools designed to validate complex workflows without modifying certified systems or installing intrusive agents.
- Non-invasive screen-level automation
Interact with green-screen and terminal-based applications without altering the production environment. - End-to-end workflow validation
Support full end to end testing mainframe processes across host systems and connected applications. - Secure test environments
Operate within restricted networks to support mainframe security testing and compliance requirements. - Performance and stability assurance
Enable structured mainframe performance testing across critical business processes. - Scalable execution model
Run automated tests in parallel across multiple mainframe test environments to reduce regression time.
Why Use Mainframe Automated Testing?
Many organisations continue to depend on legacy systems for core operations. Manual testing in these environments is time-consuming, resource-intensive and difficult to scale. Mainframe automated testing improves reliability while reducing operational risk.
Key benefits include:
- Reduced manual effort
Automate repetitive validation tasks across complex host environments. - Improved accuracy and consistency
Minimise human error through repeatable, rules-based execution. - Faster regression cycles
Accelerate updates and system changes with automated coverage. - Stronger security validation
Support structured mainframe security testing within controlled infrastructures. - Greater operational confidence
Ensure stable, production-ready releases through reliable automation testing tools for mainframe applications.
Mainframe Automation Across Regulated Industries
Mainframe environments remain central to many regulated and data-sensitive sectors. Reliable automation testing is essential where stability, security and compliance cannot be compromised.
T-Plan supports organisations operating in:
- Insurance – Policy administration, claims systems and underwriting platforms
- Banking and financial services – Core transaction processing and host-based systems
- Government and public sector – Legacy infrastructure supporting critical services
- Retail and logistics – Inventory, supply chain and transaction platforms
By enabling secure, non-invasive automation, T-Plan helps modernise validation processes while preserving the integrity of long-standing host systems.
Universal Mainframe Automation
CROSS-PLATFORM TERMINAL VALIDATION
Trusted by Hundreds of Companies and Used by Thousands of People for Over 25 Years
What Our Automated Mainframe Testing Tool
Users Have to Say About Us
“The CMMO was delivered on time and within budget and it has been operating successfully for some six months. In a project of this size and complexity, this is no small achievement; it is something in which the Bank as a whole can take some pride.”
Key Benefits of Mainframe Automation Testing
Legacy host systems require automation that is stable, secure and capable of operating within controlled environments. T-Plan enables reliable, non-invasive mainframe automated testing across complex legacy infrastructures.
No-Code
Required
Simplify mainframe automation testing with an intuitive drag-and-drop interface.
Create Once, Reuse Across Regions
Define workflows once and execute them across development, test, UAT and batch regions.
Record and
Playback
Capture terminal and host-based interactions for repeatable regression validation.
External Data
Integration
Drive automation using structured data from files, databases and external systems.
Screen-Level
Automation
Interact directly with green-screen and host applications without invasive agents.
Multi-Platform
Support
Execute tests across Windows, Linux, virtual machines and host-connected systems.
Image-Based
Validation
Verify outputs exactly as users see them within legacy interfaces.
Third-Party
Integrations
Align with release management processes and DevOps tooling for structured end-to-end validation.
Platform Agnostic, Seamless Integration
Integration Capabilities
Integrates with a range of tools, including Selenium for script-less automated browser testing, and Jenkins for continuous integration, saving time & effort vs building and maintaining external testing frameworks.
Platform Agnostic
Automates GUI testing seamlessly across web and mobile platforms, supporting both Mac, Windows, and Linux environments with unified application, code, and file compatibility.
Image Recognition
Providing essential user feedback directly from the end-user’s perspective. Validated based on what is visually observed, not solely on the code’s output.
Code -Free Automation
An intuitive user interface designed for both technical and non-technical users, featuring drag-and-drop functionality. No Code / Low Code.
Mainframe Automation Testing FAQs
Mainframe automation testing refers to the use of automation tools to validate applications running on legacy host systems. It enables repeatable testing of core business processes without relying solely on manual validation, helping organisations improve reliability, performance and release confidence.
Mainframe applications can be automated by simulating user interactions with terminal or green-screen interfaces, validating outputs and integrating test execution into release processes. Tools such as T-Plan use non-invasive, screen-level automation to interact with host systems without modifying certified environments.
Mainframe testing tools are specialised solutions designed to validate applications running on host systems. They support functional, performance and security validation within controlled test environments. Modern automation testing tools for mainframe applications often operate at screen level to avoid invasive system changes.
End-to-end testing mainframe workflows involves validating complete business processes across host systems and connected applications. This ensures that data flows correctly from input through processing to output, supporting stable and production-ready releases.
End-to-end testing validates full system workflows technically before release, while User Acceptance Testing focuses on confirming that the solution meets business requirements. In mainframe environments, both are important but serve different stages of validation.
Mainframe performance testing evaluates how host applications behave under load, including response times, transaction throughput and batch execution stability. Automated validation helps ensure that updates do not negatively impact system performance.
Mainframe security testing involves validating access controls, data handling and system protections within host environments. This may include structured validation of permissions, roles and compliance requirements in controlled infrastructures.