R Under development (unstable) (2023-09-29 r85235 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(curl)
Using libcurl 8.3.0 with Schannel
> 
> # Comply with CRAN policy: skip tests if no internet
> if(curl::has_internet()){
+   test_check("curl")
+ }
This is libcurl version 8.3.0 with (OpenSSL/3.1.2) Schannel 
Using test server: https://hb.r-universe.dev 
[ FAIL 0 | WARN 0 | SKIP 4 | PASS 219 ]

══ Skipped tests (4) ═══════════════════════════════════════════════════════════
• On CRAN (4): 'test-idn.R:6:3', 'test-multi-download.R:4:3',
  'test-seek.R:4:3', 'test-winssl.R:4:3'

[ FAIL 0 | WARN 0 | SKIP 4 | PASS 219 ]
> 
> proc.time()
   user  system elapsed 
   4.40    0.45   56.76