R Under development (unstable) (2026-01-16 r89305 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(fect)
> 
> test_check("fect")


F-test Failed. The estimated covariance matrix is singular.


Dropped 0 always-treated units.


F-test Failed. The estimated covariance matrix is singular.


Number of Always Treated Observations Removed:0.

Parametric Bootstrap 


Simulating errors ...
Can't calculate the F statistic because of insufficient treated units.

Uncertainty estimates not available.

Uncertainty estimates not available.

[ FAIL 0 | WARN 1 | SKIP 1 | PASS 32 ]

══ Skipped tests (1) ═══════════════════════════════════════════════════════════
• {HonestDiDFEct} is not installed (1): 'test-fect-sens.R:2:3'

[ FAIL 0 | WARN 1 | SKIP 1 | PASS 32 ]
> 
> proc.time()
   user  system elapsed 
  13.67    0.70   14.35