How does automatic test harness generation work?

EverTest isolates any Simulink subsystem from the remainder of the model and creates a test harness that provides time sequences of input data, parameter values to test variants of functionality, expected output data and an assessment mechanism to verify the unit behaviour — automatically.

How are tolerances handled in test assessments?

EverTest supports relative, absolute and temporal tolerances for automated assessments. Results are colour-coded: green for passed, light-green for within tolerance, red for failed, grey for explicitly ignored values.

Can EverTest test reactive and closed-loop systems?

Yes. The signal feedthrough feature enables reactive testing of closed-loop models. EverTest uses Simulink and Stateflow for specifying signal generators, temporal patterns and plant model conditions.

Which structural coverage metrics are supported?

EverTest supports Decision Coverage (branch coverage) and Modified Condition Decision Coverage (MCDC) via a one-click Simulink Coverage interface, producing merged reports at both model and C code level.

How does back-to-back testing work?

EverTest verifies numerical equivalence between a Simulink model and generated C code. MIL testing is followed by back-to-back SIL/PIL comparison, producing a verification report compliant with ISO 26262.

Does EverTest support SIL testing with external C-code?

Yes. EverTest integrates external C-code into Simulink for unit testing and coverage measurement. Test cases from MIL can be reused. Debugging uses Microsoft Visual Studio (SIL) or Lauterbach Trace-32 (PIL).

Can I observe internal signals without changing the model?

Yes. Test Signals (Type T) let you monitor any signal at any hierarchy level without modifying the original design, keeping production interfaces intact.

Is EverTest qualified for ISO 26262?

Yes. EverTest is a qualifiable tool certified under ISO 26262 and IEC 61508. It ships with a TÜV SÜD-assessed safety manual and a Qualification Kit with TCL 3 validation tests to run in your own project environment.

EverTest — Dynamic Model Verification for Simulink & Stateflow

What EverTest Does

Everything You Need
to Verify Your Models

From harness generation to compliance reports — one tool, your MATLAB environment.

Harness & Setup

Automatic Test Harness Generation

Isolate any Simulink subsystem instantly. EverTest builds the harness, defines the unit interface, and sets up MIL, SIL and PIL simulation — automatically.

MIL SIL PIL AI Agent Ready

Test Case Definition

Define Test Cases in Excel — No Programming Needed

Test cases are plain Excel tables — no scripting, no code. Define inputs, expected outputs and parameters directly in a spreadsheet. Human-readable, easy to review, and ready for AI agents to generate or extend test cases automatically.

No Programming Required AI Agent Ready

Test Specification

Interface Specification for Signals and Parameters

Define inputs, outputs and parameters with full type, dimension, min/max, unit and description — all in one structured sheet. EverTest keeps everything consistent across test cases.

Signals Parameters Data Types Dimensions Min / Max Units

Execution

Simple GUI and Full Test Automation API

Run test cases one-by-one or in batch via GUI or command-line API. Fully scriptable — ready for CI/CD pipelines and AI agents to generate new test cases automatically, drive test execution, and evaluate results.

GUI CLI / API CI/CD Ready AI Agent Ready

Verification

SIL / PIL Back-to-Back Testing

Verify numerical equivalence between your Simulink model and generated C code. EverTest automates the C code integration. Supporting a wide range of embedded targets.

Required by ISO 26262 TRACE32 On-Target Debugging

Traceability

Requirements Traceability

Link test cases directly to requirements. The Requirements Traceability Matrix answers where each requirement is implemented, where it is verified, and what the verification results are.

Requirements → Model → Tests Impact Analysis Audit-Ready

Coverage

Structural Test Coverage

Track Decision and MCDC structural coverage at model and C code level. Verify boundary values — ensuring signals and parameters are tested across their full specified limits.

Decision Coverage MCDC Boundary Value Analysis

Debugging

Step-by-Step Debugger

Pinpoint failures directly in Simulink models or integrated C code — using the built-in model debugger (MIL), Microsoft Visual Studio (SIL) or Lauterbach Trace-32 (PIL).

MIL SIL PIL Visual Studio TRACE32

Reporting

Verification Reports

Test specifications live in Excel. Results export automatically to XML and HTML. Readable by engineers, reviewers and auditors alike. Import and export MDF4, MAT and Signal Builder data.

Excel XML HTML MDF4 MAT Signal Builder

Model Review

EverView — Visual Model Review

EverTest generates EverView — a single self-contained HTML file that looks and navigates exactly like your Simulink model. Share it with anyone on your team for offline inspection, annotations and review comments — no MATLAB license required.

No License Required Offline Annotations Full Model Hierarchy

Compliance

ISO 26262 Qualification Kit — TCL 3 Ready

EverTest ships with a TÜV SÜD-assessed safety manual and a complete Qualification Kit. Run the validation test suite in your own environment, document the results — you are qualified.

TCL 3 Validation Report TÜV SÜD Assessed

The vendor does the heavy lifting. The final evidence must come from your environment.

Who Uses EverTest

The Right Tool —
For Every Role on Your Team

💻

Function Developer

"I need to verify my models fast, without process overhead."

Define test cases in Excel, generate the harness automatically and run MIL/SIL tests with pass/fail results — all without leaving MATLAB.

🛡️

Safety Manager

"I need proof that our tools and results are audit-ready."

Use the TCL 3 Qualification Kit and TÜV SÜD-assessed safety manual to qualify EverTest in your project environment. Requirements traceability and verification reports included.

👥

Team Lead

"I need a consistent verification process across my team."

EverTest's structured Excel format and automated reporting keep every engineer on the same workflow — and every audit consistent and repeatable.

⚙️

Tool Chain Manager

"I need to integrate and qualify tools in our CI/CD pipeline."

Deploy EverTest via CLI/API into your pipeline. The Qualification Kit covers TCL 3 and reduces qualification effort — keeping your tool chain compliant and automated.

Getting Started

Up and Running
in Minutes

Everything you need to download, install and start verifying your Simulink models today.

⬇️

Download

Get the latest EverTest installer directly from EverBits — free trial, no commitment required.

Tiny installation file
No credit card needed
Activation via licence file
Download Free Trial →

🖥️

System Requirements

EverTest runs entirely inside your MATLAB R2018a or later environment.

Windows® 10 or later
MATLAB®, Simulink® (required)
Stateflow®, Simulink Coverage®
Microsoft Excel®

🔑

Licensing

Flexible licensing options for individuals and teams — annual, perpetual or network-based.

Individual annual license
Individual perpetual license
Network named user license
Network concurrent license

Video Tutorials

Learn EverTest
in Minutes

Short, focused tutorials covering the most important EverTest workflows — from your first test harness to back-to-back SIL verification.

Simulink Test Harness

Isolate any Simulink subsystem and generate a test harness with interface definition automatically.

Watch →

Graphical User Interface

Walkthrough of the EverTest GUI — toolbar, test specification sheet and work-product management.

Watch →

SIL Testing with C-Code Integration

How to integrate external C-code and run back-to-back SIL verification against your Simulink model.

Watch →

Requirements-Based Testing

Link test cases to requirements and generate a Requirements Traceability Matrix automatically.

Watch →

Simulink Coverage Report

Collect Decision and MCDC structural coverage across all test cases and produce a merged report.

Watch →

Closed-Loop Reactive Testing

How to use the signal feedthrough feature for reactive testing of closed-loop Simulink models.

Watch →

FAQ

Frequently Asked Questions

Answers based on the EverTest product help — from harness setup to ISO 26262 qualification.

EverTest isolates any Simulink subsystem from the remainder of the model and creates a test harness that provides time sequences of input data to stimulate the unit, parameter values to test variants of functionality, expected output data for the reference behaviour, and an assessment mechanism to verify the unit behaviour. No manual setup is required.

EverTest reads the MATLAB workspace to populate parameter values when adding new test cases. It reads values from MATLAB variables and Simulink.Parameter objects. If parameters are missing or the model is not updatable, EverTest populates them with default values of zero.

EverTest provides a Clean-Up feature that supports you during interface changes. It fixes the format, dimensions, names and data types across all selected test cases, propagating modifications consistently and setting the order, colours and other formal data properties automatically.

In the EverTest specification you define which inputs, outputs and parameters will be used during simulation. Each interface entry includes: Name, Type, Data Type, Dimension, Min, Max, Unit and Description. The Interface sheet lets you define all characteristics including port order.

Direct comparison of simulated outputs and expected results is not always practical. EverTest supports relative, absolute and temporal tolerances for automated assessments. Pass-fail results are indicated by background colours: green for passed, light-green for within the tolerance band, red for failed, and grey for explicitly ignored values.

EverTest generates a Requirements Traceability Matrix that answers three questions for each requirement: where it is implemented in the design, where it is verified in the test suite, and what the verification results are. This supports impact analysis and audit evidence for ISO 26262.

Yes. The signal feedthrough feature of EverTest enables reactive testing of closed-loop models. EverTest uses the full power of Simulink and Stateflow for specifying signal generators, temporal patterns and conditions of plant models. The interface specification can be reconfigured for closed-loop simulations.

EverTest provides a one-click interface to Simulink Coverage, collecting structural test coverage for all executed test cases at both model and C code level. Both Decision Coverage (branch coverage) and Modified Condition Decision Coverage (MCDC) are supported. EverTest merges all work products into a self-contained coverage report.

EverTest performs back-to-back testing to verify numerical equivalence between a Simulink model and its associated generated C code. Testing is carried out at model level (MIL), followed by comparison tests between model and code (SIL/PIL). The result is a verification report compliant with ISO 26262 requirements.

Yes. EverTest provides a simple interface to integrate external C-code into Simulink for unit testing and coverage measurement. You can reuse your model-based test cases and retain the ability to change parameter values per test case. C-code can be debugged using Microsoft Visual Studio (SIL) or Lauterbach Trace-32 (PIL).

Yes. Test Signals (Type T) allow you to monitor any signal at any level of the model hierarchy without touching the original design. This avoids routing buried signals through multiple levels of hierarchy, preventing interface clutter and technical debt while keeping production interfaces intact.

EverTest is a qualifiable tool certified for dynamic model verification under ISO 26262 and IEC 61508. It ships with a safety manual assessed by TÜV SÜD and a Qualification Kit containing TCL 3 validation tests. You run the validation suite in your own project environment and document the results — that constitutes your tool qualification.

Test faster.
Right inside Simulink.

Three Testing Problems —
Solved in One Tool

Manual Harness Setup Wastes Time

SIL / PIL Testing Is Too Complex

Compliance Reports Take Too Long