diff --git a/internal/core/upstream_server_test.go b/internal/core/upstream_server_test.go
new file mode 100644
index 0000000..7b0eed5
--- /dev/null
+++ b/internal/core/upstream_server_test.go
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2023 F5 Inc. All rights reserved.
+ * Use of this source code is governed by the Apache License that can be found in the LICENSE file.
+ */
+
+package core
+
+import "testing"
+
+func TestNewUpstreamServer(t *testing.T) {
+	host := "localhost"
+	us := NewUpstreamServer(host)
+	if us.Host != host {
+		t.Errorf("NewUpstreamServer(%s) = %s; want %s", host, us.Host, host)
+	}
+}