$ nimble --verbose test
  Verifying dependencies for [email protected]
  Compiling /home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/tests/test1 (from package d3) using js backend
  Executing /usr/bin/nim js --noNimblePath -d:NimblePkgVersion=0.1.3 -r --path:. /home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/tests/test1
Hint: used config file '/etc/nim/nim.cfg' [Conf]
Hint: used config file '/etc/nim/config.nims' [Conf]
Hint: used config file '/home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/tests/config.nims' [Conf]
............................
/home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/src/d3/d3_axis.nim(6, 8) Warning: imported and not used: 'sequtils' [UnusedImport]
.
/home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/src/d3/d3_format.nim(6, 8) Warning: imported and not used: 'sequtils' [UnusedImport]
....
/home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/src/d3/d3_time_format.nim(6, 8) Warning: imported and not used: 'sequtils' [UnusedImport]
/home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/tests/test1.nim(11, 6) template/generic instantiation of `test` from here
/home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/tests/test1.nim(12, 9) template/generic instantiation of `check` from here
/usr/lib/nim/pure/unittest.nim(646, 43) Error: type mismatch: got <int literal(5), int literal(5)>
but expected one of: 
proc add(x: var cstring; y: cstring)
  first type mismatch at position: 1
  required type for x: var cstring
  but expression '5' is of type: int literal(5)
proc add(x: var string; y: char)
  first type mismatch at position: 1
  required type for x: var string
  but expression '5' is of type: int literal(5)
proc add(x: var string; y: cstring)
  first type mismatch at position: 1
  required type for x: var string
  but expression '5' is of type: int literal(5)
proc add(x: var string; y: string)
  first type mismatch at position: 1
  required type for x: var string
  but expression '5' is of type: int literal(5)
proc add[T](x: var seq[T]; y: openArray[T])
  first type mismatch at position: 1
  required type for x: var seq[T]
  but expression '5' is of type: int literal(5)
proc add[T](x: var seq[T]; y: sink T)
  first type mismatch at position: 1
  required type for x: var seq[T]
  but expression '5' is of type: int literal(5)

expression: add(5, 5)
     Error: Execution failed with exit code 1
        ... Command: /usr/bin/nim js --noNimblePath -d:NimblePkgVersion=0.1.3 -r --path:. /home/moeller/git/nim-team/nim-d3/nim-d3-0.1.3/tests/test1

$ nim --version|head -n2
Nim Compiler Version 1.4.0 [Linux: amd64]
Compiled at 2020-11-25