Techniques for Black Box Testing of Machine Learning Models

Posted By :Sanjana Singh |30th June 2020

Machine learning is a subset of Artificial Intelligence (AI), that focuses on machines making critical decisions on the basis of complex and previously-analyzed data. It is an important aspect in today's world because learning requires intelligence to make decisions. Under software testing, the application of AI is channelized to make software development lifecycles easier and more efficient. Among other software testing techniques, black-box testing of machine learning models is budding as a quality assurance approach that evaluates the model's functioning without internal knowledge. 


Machine learning development requires extensive use of data and algorithms that demand in-depth monitoring of functions not always known to the tester themselves. Therefore, techniques such as BlackBox and white box testing have been applied and quality control checks are performed on machine learning models. It looks like it could be the work of a QA test / technical expert in the field of Artificial Intelligence.


Black Box and White Box Testing through Machine Learning



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Model Performance Testing:


Testing the models with new test data sets and then comparing their behavior to ensure their accuracy comes under model performance testing.

This is the technique of Machine Learning which has been used for BlackBox testing. Black box models such as neural networks, gradient magnification models, or complex ensembles often provide high accuracy. The intrinsic performance of these models is difficult to understand and does not provide an estimate of the relative importance of each factor in model predictions, nor is it easy to understand how different factors interact.


As an experiential AI Development Company, we, at Oodles, are adept in applying both black-box and white-box techniques for software testing. Our AI team undertakes a step-by-step approach to using the black-box testing technique for efficiently mapping-


  1. Complex interface errors
  2. Model performance errors
  3. Incorrect or missing functions
  4. Database errors, and more


We build robust machine learning models and applications that generate value for businesses while maintaining compliance with industry standards. 



Metamorphic Testing:


This exercise tries to alleviate the occlusal problem. A test group is a way that an experimenter can see if the system is working properly. This occurs when it is difficult to obtain the expected results of the selected test cases or to determine whether the actual result is consistent with the expected results. Simple models such as the line of decomposition and decision trees on the other hand provide little predictive power and are not always able to model the complexity of the data. Yet it is very easy to explain and interpret.

In a metamorphic experiment, one or more areas have identified that show a metamorphic relationship between the two input states. For example, in a sense, an Machine Learning model is constructed that predicts the probability of a person with a specific illness, which is determined based on various predictions, age, smoking habits, exercise habits, etc.


Dual coding with Machine Learning:


In the dual-encoding process, different models have been created which are based on different algorithms, and then the predictions will be compared from each of these models to provide a specific set of input. Multiple models using different algorithms are developed and the predictions from each are compared, given the same input set. To build a specific model for solving separation problems, a few algorithms like Random Forest or neural networks such as LSTM can be used - but the model that produces the most expected and accurate results is ultimately preferred as the default model.


Guided Guaranteed Integration:


The information included in the ML model is designed to test the overall performance of the feature. For example, for models built with neural networks, testers need experimental data sets, which can result in the performance of individual neurons/nodes in the neural network.




There are various methods you can use to improve the interpretation of your machine learning models. Although strategies are steadily increasing as the field develops, it is important to always compare different strategies.

About Author

Sanjana Singh

Sanjana is a QA Engineer with skills in Manual Testing and always eager to learn new technologies.

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