Fix test failures

[oraclown]

• Closes missing fuse account #383 by removing an unused fixture
• Updates another test to expect a ValueError instead of one it wasn't throwing

[codecov-commenter]

Codecov Report

Merging #384 (2bab691) into main (a732ced) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##             main     #384      +/-   ##
==========================================
- Coverage   90.80%   90.78%   -0.02%     
==========================================
  Files          21       21              
  Lines         598      586      -12     
==========================================
- Hits          543      532      -11     
+ Misses         55       54       -1     

Impacted Files	Coverage Δ
tests/conftest.py	85.71% <ø> (-0.86%)	⬇️
tests/test_rpc_endpoint.py	100.00% <100.00%> (ø)