1. A system, comprising: a memory that stores computer executable components; and a processor that executes the computer executable components stored in the memory, wherein the computer executable components comprise: a prioritization component that generates an ordered list of application program interface call subgraphs associated with a user interface of a microservices-based application, wherein the application program interface call subgraphs are ordered based on respective failure impact values of the application program interface call subgraphs on a functionality of the microservices-based application; and a test execution component that iteratively performs in the order of the ordered list for respective application program interface call subgraphs of a subset of application program interface call subgraphs: based on at least one resiliency test pattern, generation of at least one failure scenario for an application program interface call subgraph of the subset of application program interface call subgraphs; and test of the application program interface call subgraph for the at least one resiliency pattern using the at least one failure scenario.