if !isTestParam(fn.Type.Params.List[0].Type, prefix[:1]) {
		return
	}

	if tparams := fn.Type.TypeParams; tparams != nil && len(tparams.List) > 0 {
		// Note: cmd/go/internal/load also errors about TestXXX and BenchmarkXXX functions with type parameters.
		// We have currently decided to also warn before compilation/package loading. This can help users in IDEs.
		at := tokenRange{tparams.Opening, tparams.Closing}

// execution of any function of the form
//
//	func TestXxx(*testing.T)
//
// where Xxx does not start with a lowercase letter. The function name
// serves to identify the test routine.
//
// Within these functions, use the Error, Fail or related methods to signal failure.
//
// To write a new test suite, create a file that
// contains the TestXxx functions as described here,
// and give that file a name ending in "_test.go".

The 'go test' command expects to find test, benchmark, and example functions
in the "*_test.go" files corresponding to the package under test.

A test function is one named TestXxx (where Xxx does not start with a
lower case letter) and should have the signature,

	func TestXxx(t *testing.T) { ... }

A benchmark function is one named BenchmarkXxx and should have the signature,

	func BenchmarkXxx(b *testing.B) { ... }

// in the "*_test.go" files corresponding to the package under test.
//
// A test function is one named TestXxx (where Xxx does not start with a
// lower case letter) and should have the signature,
//
//	func TestXxx(t *testing.T) { ... }
//
// A benchmark function is one named BenchmarkXxx and should have the signature,
//
//	func BenchmarkXxx(b *testing.B) { ... }