Windows 7 with all updates applied.
C:\go\src>go version
go version devel +70af843fed44 Sat Apr 19 09:55:09 2014 +0200 windows/amd64
C:\go\src\pkg\crypto\x509>go test
--- FAIL: TestSystemVerify (0.03 seconds)
verify_test.go:382: #15: No expected chain matched BR/Moip Pagamentos S.A./MOIP,SSL Blindado
EV/api.moip.com.br -> GB/COMODO CA Limited//COMODO RSA Extended Validation Secure Server CA -> GB/C
OMODO CA Limited//COMODO RSA Certification Authority
FAIL
exit status 1
FAIL crypto/x509 1.117s
Windows 7 with all updates applied. C:\go\src>go version go version devel +70af843fed44 Sat Apr 19 09:55:09 2014 +0200 windows/amd64 C:\go\src\pkg\crypto\x509>go test --- FAIL: TestSystemVerify (0.03 seconds) verify_test.go:382: #15: No expected chain matched BR/Moip Pagamentos S.A./MOIP,SSL Blindado EV/api.moip.com.br -> GB/COMODO CA Limited//COMODO RSA Extended Validation Secure Server CA -> GB/C OMODO CA Limited//COMODO RSA Certification Authority FAIL exit status 1 FAIL crypto/x509 1.117s