Jupyter Kernel Conformance

Protocol compliance test results for Jupyter kernels

Last tested February 27, 2026 at 06:27 PMbec63f4
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xpython

xeus-python (python) • Protocol 5.5

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4 tests failing

22/26 passing (85%)
Protocol error: Error deserializing content for msg_type `history_reply`: data did not match any variant of untagged enum HistoryEntry(1)
history_request
Timeout(1)
comm_info_request
Protocol error: Error deserializing content for msg_type `interrupt_reply`: invalid type: null, expected struct InterruptReply(1)
interrupt_request
Protocol error: Error deserializing content for msg_type `shutdown_reply`: invalid type: null, expected struct ShutdownReply(1)
shutdown_reply

Timeout failures often indicate the kernel doesn't implement certain message types. Check if these messages are supported in your kernel.

heartbeat_responds
Kernel responds to heartbeat ping within timeout
heartbeat
Pass
kernel_info_reply_valid
Kernel returns valid kernel_info_reply with status ok
kernel_info_request
Pass
kernel_info_has_language_info
kernel_info_reply contains non-empty language_info.name
kernel_info_request
Pass
kernel_info_has_protocol_version
kernel_info_reply contains non-empty protocol_version
kernel_info_request
Pass
execute_stdout
Execute code that prints produces stream message on stdout
execute_request2ms
Pass
execute_stderr
Execute code that prints to stderr produces stream message
stream2ms
Pass
execute_reply_ok
Execute valid code returns execute_reply with status ok
execute_request1ms
Pass
status_busy_idle_lifecycle
Kernel broadcasts busy then idle status on iopub during execution
status1ms
Pass
execute_input_broadcast
Kernel broadcasts execute_input on iopub when executing
execute_input1ms
Pass
shutdown_reply
Kernel responds to shutdown request and terminates cleanly
shutdown_request
Fail

complete_request
Kernel responds to completion request with complete_reply
complete_request250ms
Pass
inspect_request
Kernel responds to inspection request with inspect_reply
inspect_request1ms
Pass
is_complete_complete
Kernel correctly identifies complete code as 'complete'
is_complete_request
Pass
is_complete_incomplete
Kernel correctly identifies incomplete code as 'incomplete'
is_complete_request
Pass
history_request
Kernel responds to history request with history_reply
history_request1ms
Fail
comm_info_request
Kernel responds to comm_info request with comm_info_reply
comm_info_request10001ms
Fail
error_handling
Kernel properly reports errors for invalid syntax
execute_request1ms
Pass

stdin_input_request
Kernel can request input from frontend via stdin channel
input_request155ms
Pass
comms_lifecycle
Kernel supports comm open/msg/close lifecycle
comm_open
Pass
interrupt_request
Kernel responds to interrupt request on control channel
interrupt_request
Fail
execution_count_increments
Execution count increments with each execute_request
execute_request2ms
Pass
parent_header_correlation
All response messages contain correct parent_header
parent_header1ms
Pass