diff --git a/helpers_test.go b/helpers_test.go
deleted file mode 100644
index 5b1229c..0000000
--- a/helpers_test.go
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright (C) 2016 Opsmate, Inc.
-//
-// This Source Code Form is subject to the terms of the Mozilla
-// Public License, v. 2.0. If a copy of the MPL was not distributed
-// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
-//
-// This software is distributed WITHOUT A WARRANTY OF ANY KIND.
-// See the Mozilla Public License for details.
-
-package certspotter
-
-import (
-	"testing"
-)
-
-func doWildcardTest(t *testing.T, dnsName string, wildcard string, expected bool) {
-	if MatchesWildcard(dnsName, wildcard) != expected {
-		t.Errorf("MatchesWildcard(%q, %q) != %v", dnsName, wildcard, expected)
-	}
-}
-
-func TestMatchesWildcard(t *testing.T) {
-	doWildcardTest(t, "", "", true)
-	doWildcardTest(t, "example.com", "example.com", true)
-	doWildcardTest(t, "example.org", "example.com", false)
-	doWildcardTest(t, "example.com", "", false)
-	doWildcardTest(t, "", "example.com", false)
-	doWildcardTest(t, "", "*.example.com", false)
-	doWildcardTest(t, "", "exam*ple.com", false)
-	doWildcardTest(t, "", "exam*ple.co*m", false)
-	doWildcardTest(t, "example.org", "example.com", false)
-	doWildcardTest(t, "example.org", "*.example.com", false)
-	doWildcardTest(t, "example.org", "exam*ple.com", false)
-	doWildcardTest(t, "example.org", "exam*ple.co*m", false)
-	doWildcardTest(t, "example.com", "*.example.com", false)
-	doWildcardTest(t, "www.example.com", "*.example.com", true)
-	doWildcardTest(t, "", "*", true)
-	doWildcardTest(t, "", "****", true)
-	doWildcardTest(t, "a", "****", true)
-	doWildcardTest(t, "a", "*", true)
-	doWildcardTest(t, "a", "****", true)
-	doWildcardTest(t, "abcd", "****", true)
-	doWildcardTest(t, "abcdef", "****", true)
-	doWildcardTest(t, "www-example.com", "*-example.com", true)
-	doWildcardTest(t, "www-example-www.com", "*-example-*.com", true)
-	doWildcardTest(t, "examplecom", "example*", true)
-	doWildcardTest(t, "example.com", "example*", false)
-	doWildcardTest(t, "examplea.com", "example*", false)
-}