A wrapper around node:test's test() makes every test report the wrapper's line as its location

Fact

node:test records a test's file, line and column from the direct caller of test(). Call it through a helper — const test = (...a) => keep() && real(...a), to shard, filter or tag tests — and every test is reported at the helper's line: the failure summary's test at file.js:50:57 is the same for all of them.

Why it matters

The location is how a reader jumps from a failure to its test. Through a wrapper it points at plumbing, and an agent or editor following it reads the wrong code. The test name and the stack trace inside the test body stay right.

How to apply

• Keep the real test whenever the wrapper has nothing to do: const test = sharded ? wrapper : realTest, so plain runs keep exact lines.
• Where the wrapper is needed, print another way to find a failed test, such as a ready-to-run --test-name-pattern command with the name escaped as a regex.
• The location comes from the call stack; there is no option to pass one in.