diff --git a/canonicalize_test.go b/canonicalize_test.go
deleted file mode 100644
index 134ba5d..0000000
--- a/canonicalize_test.go
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright (C) 2019 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"
-)
-
-type stringCanonTest struct {
-	in  string
-	out string
-}
-
-var stringCanonTests = []stringCanonTest{
-	{"", ""},
-	{" ", ""},
-	{"  ", ""},
-	{"abc", "abc"},
-	{"aBc", "abc"},
-	{"ab c", "ab c"},
-	{"ab  c", "ab c"},
-	{"ab\n c", "ab c"},
-	{" ab c ", "ab c"},
-	{" ab  c ", "ab c"},
-	{" ab  c", "ab c"},
-	{"ab  c ", "ab c"},
-	{"abc ", "abc"},
-	{"abc  ", "abc"},
-	{"  abc  ", "abc"},
-	{"  abc ", "abc"},
-	{"  abc", "abc"},
-	{"  aBc de  f      g\n", "abc de f g"},
-}
-
-func TestCanonicalizeRDNString(t *testing.T) {
-	for i, test := range stringCanonTests {
-		ret := canonicalizeRDNString(test.in)
-		if test.out != ret {
-			t.Errorf("#%d: canonicalizeRDNString(%q) = %q, want %q", i, test.in, ret, test.out)
-		}
-	}
-}