diff --git a/.CodeQL.yml b/.CodeQL.yml
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--- /dev/null
+++ b/.CodeQL.yml
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+# This file configures CodeQL scanning path exclusions.
+# For more information, see:
+# https://eng.ms/docs/cloud-ai-platform/devdiv/one-engineering-system-1es/1es-docs/codeql/troubleshooting/bugs/generated-library-code
+
+path_classifiers:
+  refs:
+    # The playground and tests directories are not product code,
+    # so they don't need to be scanned by CodeQL.
+    - playground/**
+    - tests/**