Key Difference between Retesting and Regression Testing
- Regression testing is performed for passed test cases, while Retesting is done only for failed test cases.
- Regression testing checks for unexpected side-effects, while Re-testing makes sure that the original fault has been corrected.
- Regression testing doesn’t include defect verification, whereas Re-testing includes defect verification.
- Regression testing is known as generic testing, whereas Re-testing is planned testing.
- Regression testing is possible with the use of automation, whereas Re-testing is not possible with automation.
What is Retesting?
Retesting is a process to check specific test cases that are found with bug/s in the final execution. Generally, testers find these bugs while testing the software application and assign it to the developers to fix it. Then the developers fix the bug/s and assign it back to the testers for verification. This continuous process is called Retesting.
What is Regression Testing?
Regression Testing is a type of software testing executed to check whether a code change has not unfavorably disturbed current features & functions of an Application
Re-testing Vs Regression Testing is a common FAQ amongst QA aspirants. Below is a detailed comparison with Example
Retesting vs Regression Testing
|Regression Testing is carried out to confirm whether a recent program or code change has not adversely affected existing features||Re-testing is carried out to confirm the test cases that failed in the final execution are passing after the defects are fixed|
|The purpose of Regression Testing is that new code changes should not have any side effects to existing functionalities||Re-testing is done on the basis of the Defect fixes|
|Defect verification is not the part of Regression Testing||Defect verification is the part of re-testing|
|Based on the project and availability of resources, Regression Testing can be carried out parallel with Re-testing||Priority of re-testing is higher than regression testing, so it is carried out before regression testing|
|You can do automation for regression testing, Manual Testing could be expensive and time-consuming||You cannot automate the test cases for Retesting|
|Regression testing is known as a generic testing||Re-testing is a planned testing|
|Regression testing is done for passed test cases||Retesting is done only for failed test cases|
|Regression testing checks for unexpected side-effects||Re-testing makes sure that the original fault has been corrected|
|Regression testing is only done when there is any modification or changes become mandatory in an existing project||Re-testing executes a defect with the same data and the same environment with different inputs with a new build|
|Test cases for regression testing can be obtained from the functional specification, user tutorials and manuals, and defect reports in regards to corrected problems||Test cases for retesting cannot be obtained before start testing.|