Methods, systems, and devices supporting joint code validation across code repositories are described. Some systems may store code across multiple code repositories, where the code repositories support repository-specific pull requests and validations. However, code stored in one repository may depend on code stored in a different repository. To accurately validate changes to such code, a system may identify a validation trigger for a first pull request (e.g., indicating one or more code changes to a first code repository), determine a second code repository or second pull request related to the first pull request, and generate a test build across the code repositories. For example, the test build may include code updates in the first code repository according to the first pull request and code from the second code repository (e.g., updated according to the second pull request). The system may perform joint validation tests on the test build.