I have a nx project with…

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I have a nx project with multiple angular applications. When running the end-to-end tests (ng e2e) the second and all subsequent application tests fail because of the Port 4200 is already in use. Use '--port' to specify a different port. error. In a new project running tests for multiple applications work without problems. Does anyone knows a solution or could give me a hint where to look for it? cypress.json/angular.json are quite similar.