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This is a stub types definition. @ember/test-helpers provides its own type definitions, so you do not need this installed.

@types/ember__test-helpers

This is a stub types definition for @types/ember__test-helpers (https://github.com/emberjs/ember-test-helpers#readme).

@ember/test-helpers provides its own type definitions, so you don't need @types/ember__test-helpers installed!