• In Python, the line after a def f(): must be indented.
  def f():\nprint("hello", "emscripten repl!")\n\n
• Because the print() statement is not indented, it is a guaranteed IndentationError.
• The test is fundamentally broken and can never pass as it's currently written.

FIX:

await repl.enter("def f():\n  print(\"hello\", \"emscripten repl!\")\n\n");