Throughout the codebase there are various _internal_test.go files. This convention is not idiomatic Go, and some tools that expect test files for other Go files to follow the convention of _test.go. These tools will break and report that there is no test file for a particular file when there is one, it's just named slightly differently.

Consolidate the _internal_test.go files into their _test.go counterparts. If there isn't an existing _test.go file, create it.