fix: load testcase err

[Ming5024]

[codecov[bot]]

Codecov Report

Merging #161 (0473afb) into master (588ac01) will decrease coverage by 0.03%. Report is 3 commits behind head on master. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #161      +/-   ##
==========================================
- Coverage   73.10%   73.08%   -0.03%     
==========================================
  Files          24       24              
  Lines        5246     5253       +7     
==========================================
+ Hits         3835     3839       +4     
- Misses       1411     1414       +3     

Flag	Coverage Δ
unittests	73.08% <100.00%> (-0.03%)	:arrow_down:

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Files Changed	Coverage Δ
testbase/loader.py	87.87% <100.00%> (-0.97%)	:arrow_down: