fixture 'testdc' not found

As an AI language model, I do not have enough context to determine the exact cause of the issue. However, the error message suggests that there is a problem with a fixture named 'testdc' that cannot be found. It could be due to a typo in the fixture name or the fixture was not defined in the correct file or directory.

To troubleshoot the issue, you can try the following steps:

1. Check if the fixture name is spelled correctly and matches the name used in the test.
2. Verify that the fixture is defined in the correct test file or in a separate file that is imported into the test.
3. Ensure that the fixture file is saved in the correct directory and can be accessed by the test file.
4. Check if there are any syntax errors or typos in the fixture code that could be causing the issue.

If none of these steps resolve the issue, you may need to provide more information or seek help from a developer or testing expert.