This document discusses integration testing of custom workflow activities in Dynamics CRM. It introduces the xRM Test Framework, which can be used to automate integration tests for custom workflow activities. Integration tests verify that custom workflow activities work correctly within the CRM environment and across different CRM components and solutions. The document demonstrates how to write integration tests using the xRM Test Framework to test custom workflow activities implemented using both workflows and custom actions. It emphasizes the importance of automating tests and implementing continuous integration to run tests on each code check-in and release.