diff --git a/endpoint/domain_filter_test.go b/endpoint/domain_filter_test.go
index f13870106..2cb8f0412 100644
--- a/endpoint/domain_filter_test.go
+++ b/endpoint/domain_filter_test.go
@@ -40,121 +40,121 @@ type regexDomainFilterTest struct {
 var domainFilterTests = []domainFilterTest{
 	{
 		[]string{"google.com.", "exaring.de", "inovex.de"},
-		[]string{""},
+		[]string{},
 		[]string{"google.com", "exaring.de", "inovex.de"},
 		true,
 	},
 	{
 		[]string{"google.com.", "exaring.de", "inovex.de"},
-		[]string{""},
+		[]string{},
 		[]string{"google.com", "exaring.de", "inovex.de"},
 		true,
 	},
 	{
 		[]string{"google.com.", "exaring.de.", "inovex.de"},
-		[]string{""},
+		[]string{},
 		[]string{"google.com", "exaring.de", "inovex.de"},
 		true,
 	},
 	{
 		[]string{"foo.org.      "},
-		[]string{""},
+		[]string{},
 		[]string{"foo.org"},
 		true,
 	},
 	{
 		[]string{"   foo.org"},
-		[]string{""},
+		[]string{},
 		[]string{"foo.org"},
 		true,
 	},
 	{
 		[]string{"foo.org."},
-		[]string{""},
+		[]string{},
 		[]string{"foo.org"},
 		true,
 	},
 	{
 		[]string{"foo.org."},
-		[]string{""},
+		[]string{},
 		[]string{"baz.org"},
 		false,
 	},
 	{
 		[]string{"baz.foo.org."},
-		[]string{""},
+		[]string{},
 		[]string{"foo.org"},
 		false,
 	},
 	{
 		[]string{"", "foo.org."},
-		[]string{""},
+		[]string{},
 		[]string{"foo.org"},
 		true,
 	},
 	{
 		[]string{"", "foo.org."},
-		[]string{""},
+		[]string{},
 		[]string{},
 		true,
 	},
 	{
 		[]string{""},
-		[]string{""},
+		[]string{},
 		[]string{"foo.org"},
 		true,
 	},
 	{
 		[]string{""},
-		[]string{""},
+		[]string{},
 		[]string{},
 		true,
 	},
 	{
 		[]string{" "},
-		[]string{""},
+		[]string{},
 		[]string{},
 		true,
 	},
 	{
 		[]string{"bar.sub.example.org"},
-		[]string{""},
+		[]string{},
 		[]string{"foo.bar.sub.example.org"},
 		true,
 	},
 	{
 		[]string{"example.org"},
-		[]string{""},
+		[]string{},
 		[]string{"anexample.org", "test.anexample.org"},
 		false,
 	},
 	{
 		[]string{".example.org"},
-		[]string{""},
+		[]string{},
 		[]string{"anexample.org", "test.anexample.org"},
 		false,
 	},
 	{
 		[]string{".example.org"},
-		[]string{""},
+		[]string{},
 		[]string{"example.org"},
 		false,
 	},
 	{
 		[]string{".example.org"},
-		[]string{""},
+		[]string{},
 		[]string{"test.example.org"},
 		true,
 	},
 	{
 		[]string{"anexample.org"},
-		[]string{""},
+		[]string{},
 		[]string{"example.org", "test.example.org"},
 		false,
 	},
 	{
 		[]string{".org"},
-		[]string{""},
+		[]string{},
 		[]string{"example.org", "test.example.org", "foo.test.example.org"},
 		true,
 	},