diff --git a/tests/AnthropicClient.Tests/Unit/Models/CacheControlTypeTests.cs b/tests/AnthropicClient.Tests/Unit/Models/CacheControlTypeTests.cs
new file mode 100644
index 0000000..4eecb88
--- /dev/null
+++ b/tests/AnthropicClient.Tests/Unit/Models/CacheControlTypeTests.cs
@@ -0,0 +1,10 @@
+namespace AnthropicClient.Tests.Unit.Models;
+
+public class CacheControlTypeTests
+{
+  [Fact]
+  public void Ephemeral_WhenCalled_ItShouldReturnExpectedValue()
+  {
+    CacheControlType.Ephemeral.Should().Be("ephemeral");
+  }
+}
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