diff --git a/ably/export_test.go b/ably/export_test.go
index 932b6e06..84b878c9 100644
--- a/ably/export_test.go
+++ b/ably/export_test.go
@@ -188,7 +188,7 @@ func ApplyOptionsWithDefaults(o ...ClientOption) *clientOptions {
 	return applyOptionsWithDefaults(o...)
 }
 
-func EndpointFqdn(endpoint string) bool {
+func IsEndpointFqdn(endpoint string) bool {
 	return isEndpointFQDN(endpoint)
 }
 
diff --git a/ably/options_test.go b/ably/options_test.go
index d9b736ac..50c59fe1 100644
--- a/ably/options_test.go
+++ b/ably/options_test.go
@@ -441,9 +441,9 @@ func TestPaginateParams(t *testing.T) {
 	})
 }
 
-func TestEndpointFqdn(t *testing.T) {
-	assert.Equal(t, false, ably.EndpointFqdn("sandbox"))
-	assert.Equal(t, true, ably.EndpointFqdn("sandbox.example.com"))
-	assert.Equal(t, true, ably.EndpointFqdn("127.0.0.1"))
-	assert.Equal(t, true, ably.EndpointFqdn("localhost"))
+func TestIsEndpointFQDN(t *testing.T) {
+	assert.Equal(t, false, ably.IsEndpointFQDN("sandbox"))
+	assert.Equal(t, true, ably.IsEndpointFQDN("sandbox.example.com"))
+	assert.Equal(t, true, ably.IsEndpointFQDN("127.0.0.1"))
+	assert.Equal(t, true, ably.IsEndpointFQDN("localhost"))
 }