var net/http/internal/testcert.LocalhostKey
2 uses
net/http/internal/testcert (current package)
testcert.go#L36: var LocalhostKey = []byte(testingKey(`-----BEGIN RSA TESTING KEY-----
net/http/httptest
server.go#L147: cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey)
The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)