diff --git a/shared_test.go b/shared_test.go
index 9368ebd..eb40f81 100644
--- a/shared_test.go
+++ b/shared_test.go
@@ -2,6 +2,7 @@ package shuffle
 
 import (
     "testing"
+    "net/http"
 )
 
 func TestIsLoop(t *testing.T) {
@@ -26,3 +27,17 @@ func TestIsLoop(t *testing.T) {
         }
     }
 }
+
+// Simple Test for HandleInternalProxy(client)
+// set env SHUFFLE_INTERNAL_HTTP_PROXY to test the function.
+func TestHandleInternalProxy(t *testing.T) {
+	client := &http.Client{}
+	result := HandleInternalProxy(client)
+
+	if result.Transport.(*http.Transport).Proxy != nil {
+		proxyURL, _ := result.Transport.(*http.Transport).Proxy(nil)
+		t.Logf("Proxy URL set: %v", proxyURL)
+	} else {
+		t.Log("No proxy set")
+	}
+}