PR Summary

Tests had been failing on aarch64 machines due to human-imperceptible differences (antialiasing, perhaps, floating point rounding, perhaps). This PR adds a small pad to tests which failed, only for platform.machine() == 'aarch64'.

PR Checklist

• Has Pytest style unit tests
• Code is PEP 8 compliant
• New features are documented, with examples if plot related
• Documentation is sphinx and numpydoc compliant
• Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there) (N/A)
• Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way