Revert changes that have made the test runner slow

[coveralls]

Pull Request Test Coverage Report for Build 4442836833

• 34 of 35 (97.14%) changed or added relevant lines in 4 files are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-2.0%) to 62.989%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
testrunner/extract.go	15	16	93.75%
<!--	Total:	34	35	97.14%	-->

Files with Coverage Reduction	New Missed Lines	%
main.go	4	79.31%
<!--	Total:	4		-->

Totals
Change from base Build 4399056933:	-2.0%
Covered Lines:	354
Relevant Lines:	562

---

💛 - Coveralls