diff --git a/errors/error_test.go b/errors/error_test.go
index 7b04b1d98..51bdf7d37 100644
--- a/errors/error_test.go
+++ b/errors/error_test.go
@@ -240,7 +240,8 @@ func TestWrap(t *testing.T) {
 	if err.ErrorCode != int(CertificateError)+int(VerifyFailed)+certificateInvalid+int(x509.Expired) {
 		t.Fatal("Error code construction failed.")
 	}
-	if err.Message != "x509: certificate has expired or is not yet valid" {
+	errorString := "x509: certificate has expired or is not yet valid:"
+	if err.Message[:49] != errorString[:49] {
 		t.Fatal("Error message construction failed.")
 	}