diff --git a/tests/AnthropicClient.Tests/EndToEnd/EndToEndTest.cs b/tests/AnthropicClient.Tests/EndToEnd/EndToEndTest.cs
index 6e9b19b..7086d37 100644
--- a/tests/AnthropicClient.Tests/EndToEnd/EndToEndTest.cs
+++ b/tests/AnthropicClient.Tests/EndToEnd/EndToEndTest.cs
@@ -3,4 +3,5 @@ namespace AnthropicClient.Tests.EndToEnd;
 public class EndToEndTest(ConfigurationFixture configFixture) : IClassFixture<ConfigurationFixture>
 {
   protected readonly AnthropicApiClient _client = new(configFixture.AnthropicApiKey, new());
+  protected AnthropicApiClient CreateClient(HttpClient httpClient) => new(configFixture.AnthropicApiKey, httpClient);
 }
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