| S.No. | Unit Testing | Integration Testing |
| 1 | It does not occur after and before anything. | It occurs after Unit Testing and before System Testing. |
| 2 | It is not abbreviated by any name. | It is abbreviated as “I&T” that is why it is sometimes also called Integration and Testing. |
| 3 | It is not further divided into any. | It is further divided into top-down integration, Bottom-up integration and so on. |
| 4 | It may not catch integration errors, or other system-wide issues because unit testing only tests the functionality of the units themselves. | Integration testing uncovers an error that arises when modules are integrated to build the overall system. |
| 5 | The goal of unit testing is to isolate each part program and individual parts correctly. | The goal of Integration Testing is to combine modules in and test a group to see that they are working fine. |
| 6 | It does not follow anything. | It follows unit testing and precedes system testing. |
| 7 | It obviously starts from the module specification. | It obviously starts from the interface specification. |
| 8 | Unit testing always tests the visibility of code in detail. | Integration testing always tests the visibility of the integration structure. |
| 9 | It requires a complex scaffolding means frame. | It requires some scaffolding means frame. |
| 10 | It definitely pays attention to the behavior of single modules. | It definitely pays attention to the integration among modules. |
| 11 | It is only a kind of White Box Testing. | It is both a kind of Black Box and White Box Testing. |
