diff --git a/tests/Ramstack.Parsing.Tests/Utilities/StringBufferTests.cs b/tests/Ramstack.Parsing.Tests/Utilities/StringBufferTests.cs
index 3328e01..86010b6 100644
--- a/tests/Ramstack.Parsing.Tests/Utilities/StringBufferTests.cs
+++ b/tests/Ramstack.Parsing.Tests/Utilities/StringBufferTests.cs
@@ -1,4 +1,6 @@
-namespace Ramstack.Parsing.Utilities;
+#if TEST_INTERNALS
+
+namespace Ramstack.Parsing.Utilities;
 
 [TestFixture]
 public class StringBufferTests
@@ -89,3 +91,5 @@ public void FailOnLargeString()
         });
     }
 }
+
+#endif