diff --git a/server/server_test.go b/server/server_test.go
index e3cd988..bddaf8d 100644
--- a/server/server_test.go
+++ b/server/server_test.go
@@ -26,6 +26,12 @@ func TestNewServer(t *testing.T) {
 	if server.mutex == nil {
 		t.Error("Expected non-nil mutex")
 	}
+
+	server = NewServer("")
+
+	if server.addr != ":http" {
+		t.Errorf("Expected default port :http, but got %s", server.addr)
+	}
 }
 func TestServer_AddChannel(t *testing.T) {
 	// Create a new Server instance
@@ -232,6 +238,10 @@ func TestServer_Addr(t *testing.T) {
 
 	server.AddChannel(channel)
 
+	if server.Addr() != nil {
+		t.Error("Expected nil address for server that is not running")
+	}
+
 	// Start the server in a separate goroutine
 	done := make(chan struct{})